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Johnson JP, Piche L, Worral H, Atanda SA, Coyne CJ, McGee RJ, McPhee K, Bandillo N. Effective population size in field pea. BMC Genomics 2024; 25:695. [PMID: 39009980 PMCID: PMC11251210 DOI: 10.1186/s12864-024-10587-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 07/02/2024] [Indexed: 07/17/2024] Open
Abstract
BACKGROUND Effective population size (Ne) is a pivotal parameter in population genetics as it can provide information on the rate of inbreeding and the contemporary status of genetic diversity in breeding populations. The population with smaller Ne can lead to faster inbreeding, with little potential for genetic gain making selections ineffective. The importance of Ne has become increasingly recognized in plant breeding, which can help breeders monitor and enhance the genetic variability or redesign their selection protocols. Here, we present the first Ne estimates based on linkage disequilibrium (LD) in the pea genome. RESULTS We calculated and compared Ne using SNP markers from North Dakota State University (NDSU) modern breeding lines and United States Department of Agriculture (USDA) diversity panel. The extent of LD was highly variable not only between populations but also among different regions and chromosomes of the genome. Overall, NDSU had a higher and longer-range LD than the USDA that could extend up to 500 Kb, with a genome-wide average r2 of 0.57 (vs 0.34), likely due to its lower recombination rates and the selection background. The estimated Ne for the USDA was nearly three-fold higher (Ne = 174) than NDSU (Ne = 64), which can be confounded by a high degree of population structure due to the selfing nature of pea. CONCLUSIONS Our results provided insights into the genetic diversity of the germplasm studied, which can guide plant breeders to actively monitor Ne in successive cycles of breeding to sustain viability of the breeding efforts in the long term.
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Affiliation(s)
| | - Lisa Piche
- Department of Plant Sciences, North Dakota State University, Fargo, ND, 58108-6050, USA
| | - Hannah Worral
- Department of Plant Sciences, North Dakota State University, Fargo, ND, 58108-6050, USA
| | - Sikiru Adeniyi Atanda
- Department of Plant Sciences, North Dakota State University, Fargo, ND, 58108-6050, USA
| | - Clarice J Coyne
- USDA-ARS Plant Germplasm Introduction and Testing, Washington State University, Pullman, WA, 99164, USA
| | - Rebecca J McGee
- USDA-ARS Grain Legume Genetics and Physiology Research, Pullman, WA, 99164, USA
- Department of Horticulture, Washington State University, Pullman, WA, 99164, USA
| | - Kevin McPhee
- Department of Plant Science and Plant Pathology, Montana State University, 119 Plant Bioscience Building, Bozeman, MT, 59717-3150, USA
| | - Nonoy Bandillo
- Department of Plant Sciences, North Dakota State University, Fargo, ND, 58108-6050, USA.
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Dueholm B, Fonskov J, Grimberg Å, Carlsson S, Hefni M, Henriksson T, Hammenhag C. Cookability of 24 pea accessions-determining factors and potential predictors of cooking quality. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:3685-3696. [PMID: 38158792 DOI: 10.1002/jsfa.13253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 12/19/2023] [Accepted: 12/30/2023] [Indexed: 01/03/2024]
Abstract
BACKGROUND Cooking time and cooking evenness are two critical quantities when determining the cooking quality (termed cookability) of pulses. Deciphering which factors contribute to pulse cookability is important for breeding new cultivars, and the identification of potential cookability predictors can facilitate breeding efforts. Seeds from 24 morphologically diverse pea accessions were tested to identify contributing factors and potential predictors of the observed cookability using a Mattson cooker. Size- and weight-based measures were recorded, and seed-coat hardness was obtained with a penetrometer. Content of protein, starch (amylose and amylopectin), and phytate was also determined. RESULTS Distinct differences were found between wrinkled and non-wrinkled seeds in terms of water-absorption capacity, seed-coat hardness, and plunger-perforation speed. Potential predictive indicators of cooking time and cooking evenness were seed-coat hardness (r = 0.49 and r = 0.38), relative area gained (r = -0.59 and r = -0.8), and percentage of swelled seeds after soaking (r = -0.49 and r = -0.58), but only for non-wrinkled seeds. Surprisingly, the coefficients of variation for the profile area of both dry and swelled seeds appeared to be potential cookability predictors of all pea types (correlation coefficients around r = 0.5 and supported by principal component analysis). However, no strong correlation was observed between cookability and protein, starch, or phytate levels. CONCLUSION Using three types of instruments together with chemical components enabled the identification of novel cookability predictors for both cooking time and cooking evenness in pea. This study unveils the diverse quantitative aspects influencing cookability in pea. Considering both cooking time and cooking evenness, as well as seed-coat hardness, underscores the multifaceted nature of pulse cookability and offers important insights for future breeding strategies to enhance pea cultivars. © 2023 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Bjørn Dueholm
- Department of Plant Breeding, Swedish University of Agricultural Sciences, Lomma, Sweden
| | - Johanna Fonskov
- Department of Plant Breeding, Swedish University of Agricultural Sciences, Lomma, Sweden
- LM Agriculture, Svalöv, Sweden
| | - Åsa Grimberg
- Department of Plant Breeding, Swedish University of Agricultural Sciences, Lomma, Sweden
| | - Sandra Carlsson
- Department of Plant Breeding, Swedish University of Agricultural Sciences, Lomma, Sweden
| | - Mohammed Hefni
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
- Food Industries Department, Faculty of Agriculture, Mansoura University, Mansoura, Egypt
| | | | - Cecilia Hammenhag
- Department of Plant Breeding, Swedish University of Agricultural Sciences, Lomma, Sweden
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Naik S, Sudan J, Urwat U, Pakhtoon MM, Bhat B, Sharma V, Sofi PA, Shikari AB, Bhat BA, Sofi NR, Prasad PVV, Zargar SM. Genome-wide SNP discovery and genotyping delineates potential QTLs underlying major yield-attributing traits in buckwheat. THE PLANT GENOME 2024; 17:e20427. [PMID: 38239091 DOI: 10.1002/tpg2.20427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 11/07/2023] [Accepted: 12/22/2023] [Indexed: 03/22/2024]
Abstract
Buckwheat (Fagopyrum spp.) is an important nutritional and nutraceutical-rich pseudo-cereal crop. Despite its obvious potential as a functional food, buckwheat has not been fully harnessed due to its low yield, self-incompatibility, increased seed cracking, limited seed set, lodging, and frost susceptibility. The inadequate availability of genomics resources in buckwheat is one of the major reasons for this. In the present study, genome-wide association mapping (GWAS) was conducted to identify loci associated with various morphological and yield-related traits in buckwheat. High throughput genotyping by sequencing led to the identification of 34,978 single nucleotide polymorphisms that were distributed across eight chromosomes. Population structure analysis grouped the genotypes into three sub-populations. The genotypes were also characterized for various qualitative and quantitative traits at two diverse locations, the analysis of which revealed a significant difference in the mean values. The association analysis revealed a total of 71 significant marker-trait associations across eight chromosomes. The candidate genes were identified near 100 Kb of quantitative trait loci (QTLs), providing insights into several metabolic and biosynthetic pathways. The integration of phenology and GWAS in the present study is useful to uncover the consistent genomic regions, related markers associated with various yield-related traits, and potential candidate genes having implications for being utilized in molecular breeding for the improvement of economically important traits in buckwheat. Moreover, the identified QTLs will assist in tracking the desirable alleles of target genes within the buckwheat breeding populations/germplasm.
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Affiliation(s)
- Samiullah Naik
- Proteomics Laboratory, Division of Plant Biotechnology, Faculty of Horticulture, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India
| | - Jebi Sudan
- Proteomics Laboratory, Division of Plant Biotechnology, Faculty of Horticulture, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India
| | - Uneeb Urwat
- Proteomics Laboratory, Division of Plant Biotechnology, Faculty of Horticulture, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India
| | - Mohammad Maqbool Pakhtoon
- Proteomics Laboratory, Division of Plant Biotechnology, Faculty of Horticulture, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India
| | - Basharat Bhat
- Division of Animal Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India
| | - Varun Sharma
- Bioinformatics Division, NMC Genetics India Pvt. Ltd., Gurugram, India
| | - Parvaze A Sofi
- Division of Genetics and Plant Breeding, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India
| | - Asif B Shikari
- Division of Genetics and Plant Breeding, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India
| | - Bilal A Bhat
- Mountain Agriculture Research & Extension Station, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India
| | - Najeebul Rehman Sofi
- Mountain Research Centre for Field Crops, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India
| | - P V Vara Prasad
- Sustainable Intensification Innovation Lab, Kansas State University, Manhattan, Kansas, USA
| | - Sajad Majeed Zargar
- Proteomics Laboratory, Division of Plant Biotechnology, Faculty of Horticulture, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India
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Williams OR, Vander Schoor JK, Butler JB, Hecht VFG, Weller JL. Physical seed dormancy in pea is genetically separable from seed coat thickness and roughness. FRONTIERS IN PLANT SCIENCE 2024; 15:1359226. [PMID: 38476691 PMCID: PMC10927720 DOI: 10.3389/fpls.2024.1359226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 02/09/2024] [Indexed: 03/14/2024]
Abstract
Introduction The seeds of wild pea (Pisum) exhibit marked physical dormancy due to impermeability of the seed coat to water, and the loss of this dormancy is thought to have been critical for domestication. Wild pea seed coats are also notably thick and rough, traits that have also reduced during domestication and are anecdotally linked to increased permeability. However, how these traits specifically interact with permeability is unclear. Methods To investigate this, we examined the genetic control of differences in seed coat characteristics between wild P. sativum ssp. humile and a non-dormant domesticated P. s. sativum accession in a recombinant inbred population. QTL effects were confirmed and their locations refined in segregating F4/5 populations. Results In this population we found a moderate correlation between testa thickness and permeability, and identified loci that affect them independently, suggesting no close functional association. However, the major loci affecting both testa thickness and permeability collocated closely with Mendel's pigmentation locus A, suggesting flavonoid compounds under its control might contribute significantly to both traits. We also show that seed coat roughness is oligogenic in this population, with the major locus independent of both testa thickness and permeability, suggesting selection for smooth seed was unlikely to be due to effects on either of these traits. Discussion Results indicate loss of seed coat dormancy during domestication was not primarily driven by reduced testa thickness or smooth seededness. The close association between major permeability and thickness QTL and Mendel's 'A' warrant further study, particularly regarding the role of flavonoids.
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Affiliation(s)
- Owen R. Williams
- School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia
| | - Jacqueline K. Vander Schoor
- School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia
- ARC Centre of Excellence for Plant Success in Nature and Agriculture, University of Tasmania, Hobart, TAS, Australia
| | - Jakob B. Butler
- School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia
- ARC Centre of Excellence for Plant Success in Nature and Agriculture, University of Tasmania, Hobart, TAS, Australia
| | | | - James L. Weller
- School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia
- ARC Centre of Excellence for Plant Success in Nature and Agriculture, University of Tasmania, Hobart, TAS, Australia
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Crosta M, Romani M, Nazzicari N, Ferrari B, Annicchiarico P. Genomic prediction and allele mining of agronomic and morphological traits in pea ( Pisum sativum) germplasm collections. FRONTIERS IN PLANT SCIENCE 2023; 14:1320506. [PMID: 38186592 PMCID: PMC10766761 DOI: 10.3389/fpls.2023.1320506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 11/30/2023] [Indexed: 01/09/2024]
Abstract
Well-performing genomic prediction (GP) models for polygenic traits and molecular marker sets for oligogenic traits could be useful for identifying promising genetic resources in germplasm collections, setting core collections, and establishing molecular variety distinction. This study aimed at (i) defining GP models and key marker sets for predicting 15 agronomic or morphological traits in germplasm collections, (ii) verifying the GP model usefulness also for selection in breeding programs, (iii) investigating the consistency between molecular and phenotypic diversity patterns, and (iv) identifying genomic regions associated with to the target traits. The study was based on phenotyping data and over 41,000 genotyping-by-sequencing-generated SNP markers of 220 landraces or old cultivars belonging to a world germplasm collection and 11 modern cultivars. Non-metric multi-dimensional scaling (NMDS) and an analysis of population genetic structure indicated a high level of genetic differentiation of material from Western Asia, a major West-East diversity gradient, and quite limited genetic diversity of the improved germplasm. Mantel's test revealed a low correlation (r = 0.12) between phenotypic and molecular diversity, which increased (r = 0.45) when considering only the molecular diversity relative to significant SNPs from genome-wide association analyses. These analyses identified, inter alia, several areas of chromosome 6 involved in a largely pleiotropic control of vegetative or reproductive organ pigmentation. We found various significant SNPs for grain and straw yield under severe drought and onset of flowering, and one SNP on chromosome 5 for grain protein content. GP models displayed moderately high predictive ability (0.43 to 0.61) for protein content, grain and straw yield, and onset of flowering, and high predictive ability (0.76) for individual seed weight, based on intra-population, intra-environment cross-validations. The inter-population, inter-environment assessment of the models trained on the germplasm collection for breeding material of three recombinant inbred line (RIL) populations, which was challenged by much narrower diversity of the material, over eight-fold less available markers and quite different test environments, led to an overall loss of predictive ability of about 40% for seed weight, 50% for protein content and straw yield, and 60% for onset of flowering, and no prediction for grain yield. Within-RIL population predictive ability differed among populations.
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Affiliation(s)
- Margherita Crosta
- Council for Agricultural Research and Economics (CREA), Research Centre for Animal Production and Aquaculture, Lodi, Italy
- Department of Sustainable Crop Production, Catholic University of Sacred Heart, Piacenza, Italy
| | - Massimo Romani
- Council for Agricultural Research and Economics (CREA), Research Centre for Animal Production and Aquaculture, Lodi, Italy
| | - Nelson Nazzicari
- Council for Agricultural Research and Economics (CREA), Research Centre for Animal Production and Aquaculture, Lodi, Italy
| | - Barbara Ferrari
- Council for Agricultural Research and Economics (CREA), Research Centre for Animal Production and Aquaculture, Lodi, Italy
| | - Paolo Annicchiarico
- Council for Agricultural Research and Economics (CREA), Research Centre for Animal Production and Aquaculture, Lodi, Italy
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Delvento C, Arcieri F, Marcotrigiano AR, Guerriero M, Fanelli V, Dellino M, Curci PL, Bouwmeester H, Lotti C, Ricciardi L, Pavan S. High-density linkage mapping and genetic dissection of resistance to broomrape ( Orobanche crenata Forsk.) in pea ( Pisum sativum L.). FRONTIERS IN PLANT SCIENCE 2023; 14:1216297. [PMID: 37492777 PMCID: PMC10364127 DOI: 10.3389/fpls.2023.1216297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 06/21/2023] [Indexed: 07/27/2023]
Abstract
Pea (Pisum sativum L.) is a widely cultivated legume of major importance for global food security and agricultural sustainability. Crenate broomrape (Orobanche crenata Forsk.) (Oc) is a parasitic weed severely affecting legumes, including pea, in the Mediterranean Basin and the Middle East. Previously, the identification of the pea line "ROR12", displaying resistance to Oc, was reported. Two-year field trials on a segregant population of 148 F7 recombinant inbred lines (RILs), originating from a cross between "ROR12" and the susceptible cultivar "Sprinter", revealed high heritability (0.84) of the "ROR12" resistance source. Genotyping-by-sequencing (GBS) on the same RIL population allowed the construction of a high-density pea linkage map, which was compared with the pea reference genome and used for quantitative trait locus (QTL) mapping. Three QTLs associated with the response to Oc infection, named PsOcr-1, PsOcr-2, and PsOcr-3, were identified, with PsOcr-1 explaining 69.3% of the genotypic variance. Evaluation of the effects of different genotypic combinations indicated additivity between PsOcr-1 and PsOcr-2, and between PsOcr-1 and PsOcr-3, and epistasis between PsOcr-2 and PsOcr-3. Finally, three Kompetitive Allele Specific PCR (KASP) marker assays were designed on the single-nucleotide polymorphisms (SNPs) associated with the QTL significance peaks. Besides contributing to the development of pea genomic resources, this work lays the foundation for the obtainment of pea cultivars resistant to Oc and the identification of genes involved in resistance to parasitic Orobanchaceae.
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Affiliation(s)
- Chiara Delvento
- Department of Soil, Plant and Food Sciences, Section of Plant Genetics and Breeding, University of Bari Aldo Moro, Bari, Italy
| | - Francesco Arcieri
- Department of Soil, Plant and Food Sciences, Section of Plant Genetics and Breeding, University of Bari Aldo Moro, Bari, Italy
| | - Angelo Raffaele Marcotrigiano
- Department of Soil, Plant and Food Sciences, Section of Plant Genetics and Breeding, University of Bari Aldo Moro, Bari, Italy
| | - Marzia Guerriero
- Department of Soil, Plant and Food Sciences, Section of Plant Genetics and Breeding, University of Bari Aldo Moro, Bari, Italy
| | - Valentina Fanelli
- Department of Soil, Plant and Food Sciences, Section of Plant Genetics and Breeding, University of Bari Aldo Moro, Bari, Italy
| | - Maria Dellino
- Department of Soil, Plant and Food Sciences, Section of Plant Genetics and Breeding, University of Bari Aldo Moro, Bari, Italy
| | - Pasquale Luca Curci
- Institute of Biosciences and Bioresources, National Research Council (CNR), Bari, Italy
| | - Harro Bouwmeester
- Plant Hormone Biology Group, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
| | - Concetta Lotti
- Department of Agricultural, Food and Environmental Sciences, University of Foggia, Foggia, Italy
| | - Luigi Ricciardi
- Department of Soil, Plant and Food Sciences, Section of Plant Genetics and Breeding, University of Bari Aldo Moro, Bari, Italy
| | - Stefano Pavan
- Department of Soil, Plant and Food Sciences, Section of Plant Genetics and Breeding, University of Bari Aldo Moro, Bari, Italy
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Rispail N, Wohor OZ, Osuna-Caballero S, Barilli E, Rubiales D. Genetic Diversity and Population Structure of a Wide Pisum spp. Core Collection. Int J Mol Sci 2023; 24:2470. [PMID: 36768792 PMCID: PMC9916889 DOI: 10.3390/ijms24032470] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/19/2023] [Accepted: 01/25/2023] [Indexed: 02/03/2023] Open
Abstract
Peas (Pisum sativum) are the fourth most cultivated pulses worldwide and a critical source of protein in animal feed and human food. Developing pea core collections improves our understanding of pea evolution and may ease the exploitation of their genetic diversity in breeding programs. We carefully selected a highly diverse pea core collection of 325 accessions and established their genetic diversity and population structure. DArTSeq genotyping provided 35,790 polymorphic DArTseq markers, of which 24,279 were SilicoDArT and 11,511 SNP markers. More than 90% of these markers mapped onto the pea reference genome, with an average of 2787 SilicoDArT and 1644 SNP markers per chromosome, and an average LD50 distance of 0.48 and 1.38 Mbp, respectively. The pea core collection clustered in three or six subpopulations depending on the pea subspecies. Many admixed accessions were also detected, confirming the frequent genetic exchange between populations. Our results support the classification of Pisum genus into two species, P. fulvum and P. sativum (including subsp. sativum, arvense, elatius, humile, jomardii and abyssinicum). In addition, the study showed that wild alleles were incorporated into the cultivated pea through the intermediate P. sativum subsp. jomardii and P. sativum subsp. arvense during pea domestication, which have important implications for breeding programs. The high genetic diversity found in the collection and the high marker coverage are also expected to improve trait discovery and the efficient implementation of advanced breeding approaches.
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Affiliation(s)
- Nicolas Rispail
- Instituto de Agricultura Sostenible, CSIC, Avda. Menéndez Pidal s/n, 14004 Córdoba, Spain
| | - Osman Zakaria Wohor
- Instituto de Agricultura Sostenible, CSIC, Avda. Menéndez Pidal s/n, 14004 Córdoba, Spain
- Savanna Agriculture Research Institute, CSIR, Nyankpala, Tamale P.O. Box TL52, Ghana
| | | | - Eleonora Barilli
- Instituto de Agricultura Sostenible, CSIC, Avda. Menéndez Pidal s/n, 14004 Córdoba, Spain
| | - Diego Rubiales
- Instituto de Agricultura Sostenible, CSIC, Avda. Menéndez Pidal s/n, 14004 Córdoba, Spain
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Large-Scale Heat-Tolerance Screening and Genetic Diversity of Pea (Pisum sativum L.) Germplasms. PLANTS 2022; 11:plants11192473. [PMID: 36235339 PMCID: PMC9573610 DOI: 10.3390/plants11192473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/11/2022] [Accepted: 09/17/2022] [Indexed: 11/22/2022]
Abstract
Pea (Pisum sativum L.) is an important legume crop. However, the yield of pea is adversely affected by heat stress in China. In this study, heat-tolerant germplasms were screened and evaluated in the field under multi-conditions. The results showed that heat stress could significantly affect pea yield. On the basis of grain weight per plant, 257 heat-tolerant and 175 heat-sensitive accessions were obtained from the first year’s screening, and 26 extremely heat-tolerant and 19 extremely heat-sensitive accessions were finally obtained in this study. Based on SNaPshot technology, two sets of SNP markers, including 46 neutral and 20 heat-tolerance-related markers, were used to evaluate the genetic diversity and population genetic structure of the 432 pea accessions obtained from the first year’s screening. Genetic diversity analysis showed that the average polymorphic information content was lower using heat-tolerance-related markers than neutral markers because of the selective pressure under heat stress. In addition, population genetic structure analysis showed that neutral markers divided the 432 pea accessions into two subpopulations associated with sowing date type and geographical origin, while the heat-tolerance-related markers divided these germplasms into two subpopulations associated with heat tolerance and sowing date type. Overall, we present a comprehensive resource of heat-tolerant and heat-sensitive pea accessions through heat-tolerance screenings in multi-conditions, which could help genetic improvements of pea in the future.
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Martins LB, Balint-Kurti P, Reberg-Horton SC. Genome-wide association study for morphological traits and resistance to Peryonella pinodes in the USDA pea single plant plus collection. G3 (BETHESDA, MD.) 2022; 12:jkac168. [PMID: 35792880 PMCID: PMC9434253 DOI: 10.1093/g3journal/jkac168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 06/28/2022] [Indexed: 11/30/2022]
Abstract
Peas (Pisum sativum) are the second most cultivated pulse crop in the world. They can serve as human food, fodder, and cover crop. The most serious foliar disease of pea cultivars worldwide is Ascochyta blight, which can be caused by several pathogens. Of these, Peyronella pinodes is the most aggressive and prevalent worldwide. Several traits, including resistance to Peyronella pinodes, stem diameter, internode length between nodes 2-3 and 5-6, and area of 7th leaf, were measured in 269 entries of the pea single plant plus collection. The heritability (H2) of the morphological traits was relatively high, while disease resistance had low heritability. Using 53,196 single-nucleotide polymorphism markers to perform a genome-wide association study to identify genomic loci associated with variation in all the traits measured, we identified 27 trait-locus associations, 5 of which were associated with more than 1 trait.
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Affiliation(s)
- Lais B Martins
- Department of Crop and Soil Sciences, NC State University, Raleigh, NC 27607, USA
| | - Peter Balint-Kurti
- Department of Entomology and Plant Pathology, NC State University, Raleigh, NC 27607, USA
- Plant Science Research Unit USDA-ARS, NC State University, Raleigh, NC 27695, USA
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Parihar AK, Hazra KK, Lamichaney A, Dixit GP, Singh D, Singh AK, Singh NP. Characterizing plant trait(s) for improved heat tolerance in field pea (Pisum sativum L.) under subtropical climate. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2022; 66:1267-1281. [PMID: 35486200 DOI: 10.1007/s00484-022-02275-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 02/27/2022] [Accepted: 03/13/2022] [Indexed: 06/14/2023]
Abstract
Field pea is highly sensitive to climatic vagaries, particularly high-temperature stress. The crop often experiences terminal heat stress in tropical climates indicating the need for the development of heat-tolerant cultivars. Characterization and identification of stress-adaptive plant traits are pre-requisites for breeding stress-tolerant/adaptive cultivar(s). In the study, a panel of 150 diverse field pea genotypes was tested under three different temperature environments (i.e., normal sowing time or non-heat stress environment (NSTE), 15 days after normal sowing time or heat stress environment-I (LSHTE-I), and 30 days after normal sowing time or heat stress environment-II (LSHTE-II)) to verify the effect of high-temperature environment, genotype, and genotype × environment interaction on different plant traits and to elucidate their significance in heat stress adaptation/tolerance. The delayed sowing had exposed field pea crops to high temperatures during flowering stage by + 3.5 °C and + 8.1 °C in the LSHTE-I and LSHTE-II, respectively. Likewise, the maximum ambient temperature during the grain-filling period was + 3.3 °C and + 6.1 °C higher in the LSHTE-I and LSHTE-II over the NSTE. The grain yield loss with heat stress was 25.8 ± 2.2% in LSHTE-I, and 59.3 ± 1.5% in LSHTE-II compared to the NSTE. Exposure of crops to a high-temperature environment during the flowering stage had a higher impact on grain yield than the heat stress at the grain filling period. Results suggested that the reduced sink capacity (pod set (pod plant-1), seed set (seed pod-1)) was the primary cause of yield loss under the heat stress environments, while, under the NSTE, yield potential was mostly attributed to the source capacity (plant biomass). The high-temperature stress resulted in forced maturity as revealed by shrinkage in crop period (5-11%) and reproductive period (15-36%), prominently in long-duration genotypes. The failure of pod set in the upper nodes and higher ovule abortion (7-16%) was noticed under the high-temperature environments, particularly in the LSHTE-II. Multivariate analysis results revealed seed set, pods plant-1, last pod bearing node, and plant biomass as a critical yield determinant under the heat stress. The GGE biplot suggested that the genotypes G-112, G-114, and G-33 had higher potential to sustain yield coupled with higher stability across the environments and, thus, could serve as a source for breeding heat-tolerant high yielding cultivars.
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Affiliation(s)
- Ashok K Parihar
- ICAR-Indian Institute of Pulses Research, Kanpur, Uttar Pradesh, 208024, India
| | - Kali K Hazra
- ICAR-Indian Institute of Pulses Research, Kanpur, Uttar Pradesh, 208024, India.
| | - Amrit Lamichaney
- ICAR-Indian Institute of Pulses Research, Kanpur, Uttar Pradesh, 208024, India.
| | - Girish P Dixit
- ICAR-Indian Institute of Pulses Research, Kanpur, Uttar Pradesh, 208024, India
| | - Deepak Singh
- ICAR-Indian Agricultural Statistics Research Institute, New Delhi, 110012, India
| | - Anil K Singh
- ICAR-Indian Institute of Pulses Research, Kanpur, Uttar Pradesh, 208024, India
| | - Narendra P Singh
- ICAR-Indian Institute of Pulses Research, Kanpur, Uttar Pradesh, 208024, India
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11
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Gianella M, Doria E, Dondi D, Milanese C, Gallotti L, Börner A, Zannino L, Macovei A, Pagano A, Guzzon F, Biggiogera M, Balestrazzi A. Physiological and molecular aspects of seed longevity: exploring intra-species variation in eight Pisum sativum L. accessions. PHYSIOLOGIA PLANTARUM 2022; 174:e13698. [PMID: 35526223 PMCID: PMC9321030 DOI: 10.1111/ppl.13698] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 04/20/2022] [Accepted: 05/02/2022] [Indexed: 05/12/2023]
Abstract
Conservation of plant genetic diversity is fundamental for crop improvement, increasing agricultural production and sustainability, especially in the face of climatic changes. Although seed longevity is essential for the management of seed banks, few studies have, so far, addressed differences in this trait among the accessions of a single species. Eight Pisum sativum L. (pea) accessions were investigated to study the impact of long-term (approximately 20 years) storage, aiming to reveal contrasting seed longevity and clarify the causes for these differences. The outstanding seed longevity observed in the G4 accession provided a unique experimental system. To characterize the biochemical and physical status of stored seeds, reactive oxygen species, lipid peroxidation, tocopherols, free proline and reducing sugars were measured. Thermoanalytical measurements (thermogravimetry and differential scanning calorimetry) and transmission electron microscopy combined with immunohistochemical analysis were performed. The long-lived G4 seeds neither consumed tocopherols during storage nor showed free proline accumulation, as a deterioration hallmark, whereas reducing sugars were not affected. Thermal decomposition suggested a biomass composition compatible with the presence of low molecular weight molecules. Expansion of heterochromatic areas and reduced occurrence of γH2AX foci were highlighted in the nucleus of G4 seeds. The longevity of G4 seeds correlates with the occurrence of a reducing cellular environment and a nuclear ultrastructure favourable to genome stability. This work brings novelty to the study of within-species variations in seed longevity, underlining the relevance of multidisciplinary approaches in seed longevity research.
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Affiliation(s)
- Maraeva Gianella
- Department of Biology and Biotechnology ‘L. Spallanzani’University of PaviaPaviaItaly
- Royal Botanic Gardens, Kew, Wakehurst, ArdinglyHaywards HeathWest SussexUK
| | - Enrico Doria
- Department of Biology and Biotechnology ‘L. Spallanzani’University of PaviaPaviaItaly
| | - Daniele Dondi
- C.S.G.I. & Department of ChemistryUniversity of PaviaPaviaItaly
| | - Chiara Milanese
- C.S.G.I. & Department of ChemistryUniversity of PaviaPaviaItaly
| | - Lucia Gallotti
- C.S.G.I. & Department of ChemistryUniversity of PaviaPaviaItaly
| | - Andreas Börner
- Genebank DepartmentLeibniz Institute of Plant Genetics and Crop Plant Research (IPK) CorrensstrSeelandGermany
| | - Lorena Zannino
- Department of Biology and Biotechnology ‘L. Spallanzani’University of PaviaPaviaItaly
| | - Anca Macovei
- Department of Biology and Biotechnology ‘L. Spallanzani’University of PaviaPaviaItaly
| | - Andrea Pagano
- Department of Biology and Biotechnology ‘L. Spallanzani’University of PaviaPaviaItaly
| | - Filippo Guzzon
- International Maize and Wheat Improvement Center (CIMMYT)Carretera México‐VeracruzTexcocoMexico StateMexico
- Centre for Pacific Crops and Trees (CePaCT), Land Resource Division (LRD)Pacific Community (SPC)SuvaFiji
| | - Marco Biggiogera
- Department of Biology and Biotechnology ‘L. Spallanzani’University of PaviaPaviaItaly
| | - Alma Balestrazzi
- Department of Biology and Biotechnology ‘L. Spallanzani’University of PaviaPaviaItaly
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12
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Pavan S, Delvento C, Nazzicari N, Ferrari B, D’Agostino N, Taranto F, Lotti C, Ricciardi L, Annicchiarico P. Merging genotyping-by-sequencing data from two ex situ collections provides insights on the pea evolutionary history. HORTICULTURE RESEARCH 2022; 9:uhab062. [PMID: 35043171 PMCID: PMC8935929 DOI: 10.1093/hr/uhab062] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 11/09/2021] [Accepted: 11/09/2021] [Indexed: 05/13/2023]
Abstract
Pea (Pisum sativum L. subsp. sativum) is one of the oldest domesticated species and a widely cultivated legume. In this study, we combined next generation sequencing (NGS) data referring to two genotyping-by-sequencing (GBS) libraries, each one prepared from a different Pisum germplasm collection. The selection of single nucleotide polymorphism (SNP) loci called in both germplasm collections caused some loss of information; however, this did not prevent the obtainment of one of the largest datasets ever used to explore pea biodiversity, consisting of 652 accessions and 22 127 markers. The analysis of population structure reflected genetic variation based on geographic patterns and allowed the definition of a model for the expansion of pea cultivation from the domestication centre to other regions of the world. In genetically distinct populations, the average decay of linkage disequilibrium (LD) ranged from a few bases to hundreds of kilobases, thus indicating different evolutionary histories leading to their diversification. Genome-wide scans resulted in the identification of putative selective sweeps associated with domestication and breeding, including genes known to regulate shoot branching, cotyledon colour and resistance to lodging, and the correct mapping of two Mendelian genes. In addition to providing information of major interest for fundamental and applied research on pea, our work describes the first successful example of integration of different GBS datasets generated from ex situ collections - a process of potential interest for a variety of purposes, including conservation genetics, genome-wide association studies, and breeding.
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Affiliation(s)
- Stefano Pavan
- Department of Soil, Plant and Food Sciences, University of Bari “Aldo Moro”, Via Amendola 165/A, 70126 Bari, Italy
| | - Chiara Delvento
- Department of Soil, Plant and Food Sciences, University of Bari “Aldo Moro”, Via Amendola 165/A, 70126 Bari, Italy
| | - Nelson Nazzicari
- Council for Agricultural Research and Economics, Research Centre for Animal Production and Aquaculture, viale Piacenza 29, 26900 Lodi, Italy
| | - Barbara Ferrari
- Council for Agricultural Research and Economics, Research Centre for Animal Production and Aquaculture, viale Piacenza 29, 26900 Lodi, Italy
| | - Nunzio D’Agostino
- Department of Agricultural Sciences, University of Naples Federico II, via Università 100, 80055 Portici, Italy
| | - Francesca Taranto
- Institute of Biosciences and Bioresources, National Research Council of Italy, Via Amendola 165/A, 70126 Bari,
Italy
| | - Concetta Lotti
- Department of Agriculture, Food, Natural Resources and Engineering, University of Foggia, Via Napoli 25, 71100 Foggia, Italy
| | - Luigi Ricciardi
- Department of Soil, Plant and Food Sciences, University of Bari “Aldo Moro”, Via Amendola 165/A, 70126 Bari, Italy
| | - Paolo Annicchiarico
- Council for Agricultural Research and Economics, Research Centre for Animal Production and Aquaculture, viale Piacenza 29, 26900 Lodi, Italy
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13
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Thavarajah D, Lawrence TJ, Powers SE, Kay J, Thavarajah P, Shipe E, McGee R, Kumar S, Boyles R. Organic dry pea (Pisum sativum L.) biofortification for better human health. PLoS One 2022; 17:e0261109. [PMID: 35025919 PMCID: PMC8757916 DOI: 10.1371/journal.pone.0261109] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 11/25/2021] [Indexed: 12/24/2022] Open
Abstract
A primary criticism of organic agriculture is its lower yield and nutritional quality compared to conventional systems. Nutritionally, dry pea (Pisum sativum L.) is a rich source of low digestible carbohydrates, protein, and micronutrients. This study aimed to evaluate dry pea cultivars and advanced breeding lines using on-farm field selections to inform the development of biofortified organic cultivars with increased yield and nutritional quality. A total of 44 dry pea entries were grown in two USDA-certified organic on-farm locations in South Carolina (SC), United States of America (USA) for two years. Seed yield and protein for dry pea ranged from 61 to 3833 kg ha-1 and 12.6 to 34.2 g/100 g, respectively, with low heritability estimates. Total prebiotic carbohydrate concentration ranged from 14.7 to 26.6 g/100 g. A 100-g serving of organic dry pea provides 73.5 to 133% of the recommended daily allowance (%RDA) of prebiotic carbohydrates. Heritability estimates for individual prebiotic carbohydrates ranged from 0.27 to 0.82. Organic dry peas are rich in minerals [iron (Fe): 1.9-26.2 mg/100 g; zinc (Zn): 1.1-7.5 mg/100 g] and have low to moderate concentrations of phytic acid (PA:18.8-516 mg/100 g). The significant cultivar, location, and year effects were evident for grain yield, thousand seed weight (1000-seed weight), and protein, but results for other nutritional traits varied with genotype, environment, and interactions. "AAC Carver," "Jetset," and "Mystique" were the best-adapted cultivars with high yield, and "CDC Striker," "Fiddle," and "Hampton" had the highest protein concentration. These cultivars are the best performing cultivars that should be incorporated into organic dry pea breeding programs to develop cultivars suitable for organic production. In conclusion, organic dry pea has potential as a winter cash crop in southern climates. Still, it will require selecting diverse genetic material and location sourcing to develop improved cultivars with a higher yield, disease resistance, and nutritional quality.
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Affiliation(s)
- Dil Thavarajah
- Plant and Environmental Sciences, Pulse Quality and Nutritional Breeding, Biosystems Research Complex, Clemson University, Clemson, South Carolina, United States of America
| | - Tristan J. Lawrence
- Plant and Environmental Sciences, Pulse Quality and Nutritional Breeding, Biosystems Research Complex, Clemson University, Clemson, South Carolina, United States of America
| | - Sarah E. Powers
- Plant and Environmental Sciences, Pulse Quality and Nutritional Breeding, Biosystems Research Complex, Clemson University, Clemson, South Carolina, United States of America
| | - Joshua Kay
- Plant and Environmental Sciences, Pulse Quality and Nutritional Breeding, Biosystems Research Complex, Clemson University, Clemson, South Carolina, United States of America
| | - Pushparajah Thavarajah
- Plant and Environmental Sciences, Pulse Quality and Nutritional Breeding, Biosystems Research Complex, Clemson University, Clemson, South Carolina, United States of America
| | - Emerson Shipe
- Plant and Environmental Sciences, Pulse Quality and Nutritional Breeding, Biosystems Research Complex, Clemson University, Clemson, South Carolina, United States of America
| | - Rebecca McGee
- USDA Agriculture Research Service, Grain Legume Genetics and Physiology Research Unit, Washington State University, Pullman, Washington, United States of America
| | - Shiv Kumar
- Biodiversity and Crop Improvement Program, International Centre for Agricultural Research in the Dry Areas (ICARDA), Rabat, Morocco
| | - Rick Boyles
- Plant and Environmental Sciences, PeeDee Research and Education Center, Florence, South Carolina, United States of America
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14
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Bari MAA, Zheng P, Viera I, Worral H, Szwiec S, Ma Y, Main D, Coyne CJ, McGee RJ, Bandillo N. Harnessing Genetic Diversity in the USDA Pea Germplasm Collection Through Genomic Prediction. Front Genet 2022; 12:707754. [PMID: 35003202 PMCID: PMC8740293 DOI: 10.3389/fgene.2021.707754] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 10/26/2021] [Indexed: 11/13/2022] Open
Abstract
Phenotypic evaluation and efficient utilization of germplasm collections can be time-intensive, laborious, and expensive. However, with the plummeting costs of next-generation sequencing and the addition of genomic selection to the plant breeder's toolbox, we now can more efficiently tap the genetic diversity within large germplasm collections. In this study, we applied and evaluated genomic prediction's potential to a set of 482 pea (Pisum sativum L.) accessions-genotyped with 30,600 single nucleotide polymorphic (SNP) markers and phenotyped for seed yield and yield-related components-for enhancing selection of accessions from the USDA Pea Germplasm Collection. Genomic prediction models and several factors affecting predictive ability were evaluated in a series of cross-validation schemes across complex traits. Different genomic prediction models gave similar results, with predictive ability across traits ranging from 0.23 to 0.60, with no model working best across all traits. Increasing the training population size improved the predictive ability of most traits, including seed yield. Predictive abilities increased and reached a plateau with increasing number of markers presumably due to extensive linkage disequilibrium in the pea genome. Accounting for population structure effects did not significantly boost predictive ability, but we observed a slight improvement in seed yield. By applying the best genomic prediction model (e.g., RR-BLUP), we then examined the distribution of genotyped but nonphenotyped accessions and the reliability of genomic estimated breeding values (GEBV). The distribution of GEBV suggested that none of the nonphenotyped accessions were expected to perform outside the range of the phenotyped accessions. Desirable breeding values with higher reliability can be used to identify and screen favorable germplasm accessions. Expanding the training set and incorporating additional orthogonal information (e.g., transcriptomics, metabolomics, physiological traits, etc.) into the genomic prediction framework can enhance prediction accuracy.
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Affiliation(s)
- Md Abdullah Al Bari
- Department of Plant Sciences, North Dakota State University, Fargo, ND, United States
| | - Ping Zheng
- Department of Horticulture, Washington State University, Pullman, WA, United States
| | - Indalecio Viera
- Department of Plant Sciences, North Dakota State University, Fargo, ND, United States
| | - Hannah Worral
- NDSU North Central Research Extension Center, Minot, ND, United States
| | - Stephen Szwiec
- NDSU North Central Research Extension Center, Minot, ND, United States
| | - Yu Ma
- Department of Horticulture, Washington State University, Pullman, WA, United States
| | - Dorrie Main
- Department of Horticulture, Washington State University, Pullman, WA, United States
| | - Clarice J Coyne
- USDA-ARS Plant Germplasm Introduction and Testing, Washington State University, Pullman, WA, United States
| | - Rebecca J McGee
- USDA-ARS Grain Legume Genetics and Physiology Research, Pullman, WA, United States
| | - Nonoy Bandillo
- Department of Plant Sciences, North Dakota State University, Fargo, ND, United States
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15
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Powers S, Boatwright JL, Thavarajah D. Genome-wide association studies of mineral and phytic acid concentrations in pea (Pisum sativum L.) to evaluate biofortification potential. G3 (BETHESDA, MD.) 2021; 11:jkab227. [PMID: 34544130 PMCID: PMC8496233 DOI: 10.1093/g3journal/jkab227] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 06/27/2021] [Indexed: 11/12/2022]
Abstract
Pea (Pisum sativum L.) is an important cool season food legume for sustainable food production and human nutrition due to its nitrogen fixation capabilities and nutrient-dense seed. However, minimal breeding research has been conducted to improve the nutritional quality of the seed for biofortification, and most genomic-assisted breeding studies utilize small populations with few single nucleotide polymorphisms (SNPs). Genomic resources for pea have lagged behind those of other grain crops, but the recent release of the Pea Single Plant Plus Collection (PSPPC) and the pea reference genome provide new tools to study nutritional traits for biofortification. Calcium, phosphorus, potassium, iron, zinc, and phytic acid concentrations were measured in a study population of 299 different accessions grown under greenhouse conditions. Broad phenotypic variation was detected for all parameters except phytic acid. Calcium exhibited moderate broad-sense heritability (H2) estimates, at 50%, while all other minerals exhibited low heritability. Of the accessions used, 267 were previously genotyped in the PSPPC release by the USDA, and we mapped the genotyping data to the pea reference genome for the first time. This study generated 54,344 high-quality SNPs used to investigate the population structure of the PSPPC and perform a genome-wide association study to identify genomic loci associated with mineral concentrations in mature pea seed. Overall, we were able to identify multiple significant SNPs and candidate genes for iron, phosphorus, and zinc. These results can be used for genetic improvement in pea for nutritional traits and biofortification, and the candidate genes provide insight into mineral metabolism.
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Affiliation(s)
- Sarah Powers
- Plant and Environmental Sciences, Clemson University, Clemson, SC 29634, USA
| | - J Lucas Boatwright
- Plant and Environmental Sciences, Clemson University, Clemson, SC 29634, USA
| | - Dil Thavarajah
- Plant and Environmental Sciences, Clemson University, Clemson, SC 29634, USA
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16
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Swisher Grimm KD, Porter LD. KASP Markers Reveal Established and Novel Sources of Resistance to Pea Seedborne Mosaic Virus in Pea Genetic Resources. PLANT DISEASE 2021; 105:2503-2508. [PMID: 33487018 DOI: 10.1094/pdis-09-20-1917-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Pea seed-borne mosaic virus (PSbMV) is both seedborne and aphid-transmitted and can cause economic losses for pea (Pisum sativum L.) production by reducing yield through decreased seed weight and number. The P1 pathotype is especially virulent, affecting this important vegetable crop across the United States and internationally in regions of West Asia, North Africa, Europe, and Australia. Previously, two kompetitive allele-specific PCR (KASP) genotyping markers (eIF4E resistant 1 and 2) were developed and validated on P. sativum accessions identifying two PSbMV pathotype P1 resistance alleles in the eukaryotic translation initiation factor gene, eIF4E. The current study utilized these novel markers to rapidly evaluate 318 genetic resource accessions maintained as part of the United States Department of Agriculture National Plant Germplasm System's Pea Single Plant Collection (PSPC). The evaluations also included 58 commercial and other plant introduction (PI) lines that were assessed for the two eIF4E resistance alleles. All genotyping results were validated in greenhouse assays by confirmation of observable disease symptoms after inoculations and by enzyme-linked immunosorbent assays. The eIF4E resistant 1 and 2 alleles were found in 18 accessions from the PSPC, five commercial lines, and 14 other PI accessions. A single PSPC accession showed resistance to PSbMV pathotype P1 that is believed to be a novel source of resistance based on sequencing analysis of eIF4E. Sources of resistance were identified in the PSPC and in commercial cultivars that can be introgressed into breeding lines using traditional techniques to reduce the time and cost required to generate germplasm with superior disease-resistant traits.
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Affiliation(s)
- Kylie D Swisher Grimm
- Agricultural Research Service of the United States Department of Agriculture, Temperate Tree Fruit and Vegetable Research Unit, Prosser, WA 99350
| | - Lyndon D Porter
- Agricultural Research Service of the United States Department of Agriculture, Grain Legume Genetics and Physiology Research Unit, Prosser, WA 99350
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17
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Yu B, Xiang D, Mahfuz H, Patterson N, Bing D. Understanding Starch Metabolism in Pea Seeds towards Tailoring Functionality for Value-Added Utilization. Int J Mol Sci 2021; 22:8972. [PMID: 34445676 PMCID: PMC8396644 DOI: 10.3390/ijms22168972] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 08/16/2021] [Accepted: 08/16/2021] [Indexed: 11/17/2022] Open
Abstract
Starch is the most abundant storage carbohydrate and a major component in pea seeds, accounting for about 50% of dry seed weight. As a by-product of pea protein processing, current uses for pea starch are limited to low-value, commodity markets. The globally growing demand for pea protein poses a great challenge for the pea fractionation industry to develop new markets for starch valorization. However, there exist gaps in our understanding of the genetic mechanism underlying starch metabolism, and its relationship with physicochemical and functional properties, which is a prerequisite for targeted tailoring functionality and innovative applications of starch. This review outlines the understanding of starch metabolism with a particular focus on peas and highlights the knowledge of pea starch granule structure and its relationship with functional properties, and industrial applications. Using the currently available pea genetics and genomics knowledge and breakthroughs in omics technologies, we discuss the perspectives and possible avenues to advance our understanding of starch metabolism in peas at an unprecedented level, to ultimately enable the molecular design of multi-functional native pea starch and to create value-added utilization.
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Affiliation(s)
- Bianyun Yu
- Aquatic and Crop Resource Development Research Centre, National Research Council Canada, 110 Gymnasium Place, Saskatoon, SK S7N 0W9, Canada; (D.X.); (H.M.); (N.P.)
| | - Daoquan Xiang
- Aquatic and Crop Resource Development Research Centre, National Research Council Canada, 110 Gymnasium Place, Saskatoon, SK S7N 0W9, Canada; (D.X.); (H.M.); (N.P.)
| | - Humaira Mahfuz
- Aquatic and Crop Resource Development Research Centre, National Research Council Canada, 110 Gymnasium Place, Saskatoon, SK S7N 0W9, Canada; (D.X.); (H.M.); (N.P.)
- Department of Biology, Faculty of Science, University of Ottawa, 30 Marie Curie, Ottawa, ON K1N 6N5, Canada
| | - Nii Patterson
- Aquatic and Crop Resource Development Research Centre, National Research Council Canada, 110 Gymnasium Place, Saskatoon, SK S7N 0W9, Canada; (D.X.); (H.M.); (N.P.)
| | - Dengjin Bing
- Lacombe Research and Development Centre, Agriculture and Agri-Food Canada, 6000 C and E Trail, Lacombe, AB T4L 1W1, Canada;
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18
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Pandey AK, Rubiales D, Wang Y, Fang P, Sun T, Liu N, Xu P. Omics resources and omics-enabled approaches for achieving high productivity and improved quality in pea (Pisum sativum L.). TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2021; 134:755-776. [PMID: 33433637 DOI: 10.1007/s00122-020-03751-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 12/10/2020] [Indexed: 05/09/2023]
Abstract
Pea (Pisum sativum L.), a cool-season legume crop grown in more than 85 countries, is the second most important grain legume and one of the major green vegetables in the world. While pea was historically studied as the genetic model leading to the discovery of the laws of genetics, pea research has lagged behind that of other major legumes in the genomics era, due to its large and complex genome. The evolving climate change and growing population have posed grand challenges to the objective of feeding the world, making it essential to invest research efforts to develop multi-omics resources and advanced breeding tools to support fast and continuous development of improved pea varieties. Recently, the pea researchers have achieved key milestones in omics and molecular breeding. The present review provides an overview of the recent important progress including the development of genetic resource databases, high-throughput genotyping assays, reference genome, genes/QTLs responsible for important traits, transcriptomic, proteomic, and phenomic atlases of various tissues under different conditions. These multi-faceted resources have enabled the successful implementation of various markers for monitoring early-generation populations as in marker-assisted backcrossing breeding programs. The emerging new breeding approaches such as CRISPR, speed breeding, and genomic selection are starting to change the paradigm of pea breeding. Collectively, the rich omics resources and omics-enable breeding approaches will enhance genetic gain in pea breeding and accelerate the release of novel pea varieties to meet the elevating demands on productivity and quality.
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Affiliation(s)
- Arun K Pandey
- College of Life Sciences, China Jiliang University, Hangzhou, 310018, China
| | - Diego Rubiales
- Institute for Sustainable Agriculture, CSIC, 14004, Córdoba, Spain
| | - Yonggang Wang
- College of Life Sciences, China Jiliang University, Hangzhou, 310018, China
| | - Pingping Fang
- College of Life Sciences, China Jiliang University, Hangzhou, 310018, China
| | - Ting Sun
- College of Life Sciences, China Jiliang University, Hangzhou, 310018, China
| | - Na Liu
- Institute of Vegetables, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Pei Xu
- College of Life Sciences, China Jiliang University, Hangzhou, 310018, China.
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19
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Powers S, Mirsky E, Bandaranayake A, Thavarajah P, Shipe E, Bridges W, Thavarajah D. Field pea (Pisum sativum L.) shows genetic variation in phosphorus use efficiency in different P environments. Sci Rep 2020; 10:18940. [PMID: 33144592 PMCID: PMC7641124 DOI: 10.1038/s41598-020-75804-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Accepted: 10/08/2020] [Indexed: 11/09/2022] Open
Abstract
Field pea is important to agriculture as a nutritionally dense legume, able to fix nitrogen from the atmosphere and supply it back to the soil. However, field pea requires more phosphorus (P) than other crops. Identifying field pea cultivars with high phosphorus use efficiency (PUE) is highly desirable for organic pulse crop biofortification. This study identified field pea accessions with high PUE by determining (1) the variation in P remobilization rate, (2) correlations between P and phytic acid (PA), and (3) broad-sense heritability estimates of P concentrations. Fifty field pea accessions were grown in a completely randomized design in a greenhouse with two replicates under normal (7551 ppm) and reduced (4459 ppm) P fertilizer conditions and harvested at two time points (mid-pod and full-pod). P concentrations ranged from 332 to 9520 ppm under normal P and from 83 to 8473 ppm under reduced P conditions across all tissues and both time points. Field pea accessions showed variation in remobilization rates, with PI 125840 and PI 137119 increasing remobilization of P under normal P conditions. Field pea accessions PI 411142 and PI 413683 increased P remobilization under the reduced P treatment. No correlation was evident between tissue P concentration and seed PA concentration (8-61 ppm). Finally, seed P concentration under limited P conditions was highly heritable (H2 = 0.85), as was mid-pod lower leaf P concentrations under normal P conditions (H2 = 0.81). In conclusion, breeding for PUE in field pea is possible by selecting for higher P remobilization accessions in low P soils with genetic and location sourcing.
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Affiliation(s)
- Sarah Powers
- Plant and Environmental Sciences, 270 Poole Agricultural Center, Clemson University, Clemson, SC, 29634, USA
| | - Emily Mirsky
- Plant and Environmental Sciences, 270 Poole Agricultural Center, Clemson University, Clemson, SC, 29634, USA
| | - Anuruddha Bandaranayake
- Plant and Environmental Sciences, 270 Poole Agricultural Center, Clemson University, Clemson, SC, 29634, USA
| | - Pushparajah Thavarajah
- Plant and Environmental Sciences, 270 Poole Agricultural Center, Clemson University, Clemson, SC, 29634, USA
| | - Emerson Shipe
- Plant and Environmental Sciences, 270 Poole Agricultural Center, Clemson University, Clemson, SC, 29634, USA
| | - William Bridges
- Plant and Environmental Sciences, 270 Poole Agricultural Center, Clemson University, Clemson, SC, 29634, USA
| | - Dil Thavarajah
- Plant and Environmental Sciences, 270 Poole Agricultural Center, Clemson University, Clemson, SC, 29634, USA.
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20
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DNA Fingerprinting and Species Identification Uncovers the Genetic Diversity of Katsouni Pea in the Greek Islands Amorgos and Schinoussa. PLANTS 2020; 9:plants9040479. [PMID: 32283704 PMCID: PMC7238155 DOI: 10.3390/plants9040479] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 04/04/2020] [Accepted: 04/05/2020] [Indexed: 11/17/2022]
Abstract
Pea (P. sativum L.), one of the most important legume crops worldwide, has been traditionally cultivated in Lesser Cyclades since ancient times. The commonly known traditional pea cultivar, ‘Katsouni’, is endemic to the islands of Amorgos and Schinoussa and is of great local economic importance. Despite the widespread cultivation of ‘Katsouni’ in both islands, it is still unknown whether the current Schinoussa and Amorgos pea populations are distinct landraces, and if they have common evolutionary origin. To assist conservation and breeding of the pea crop, the genetic diversity and phylogenetic relationships of 39 pea samples from Amorgos and 86 from Schinoussa were studied using DNA barcoding and ISSR marker analyses. The results indicate that both populations are different landraces with distinct geographical distribution and are more closely related to P. sativum subsp. elatius than the P. abyssinicum and P. fulvum species. Further characterization of the ‘Katsouni’ landraces for functional polymorphisms regarding pathogen resistance, revealed susceptibility to the powdery mildew (Erysiphe pisi DC.). This work represents the first investigation on the genetic diversity and population structure of the ‘Katsouni’ cultivar. Exploiting the local genetic diversity of traditional landraces is fundamental for conservation practices and crop improvement through breeding strategies.
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Gali KK, Sackville A, Tafesse EG, Lachagari VR, McPhee K, Hybl M, Mikić A, Smýkal P, McGee R, Burstin J, Domoney C, Ellis TN, Tar'an B, Warkentin TD. Genome-Wide Association Mapping for Agronomic and Seed Quality Traits of Field Pea ( Pisum sativum L.). FRONTIERS IN PLANT SCIENCE 2019; 10:1538. [PMID: 31850030 PMCID: PMC6888555 DOI: 10.3389/fpls.2019.01538] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 11/04/2019] [Indexed: 05/24/2023]
Abstract
Genome-wide association study (GWAS) was conducted to identify loci associated with agronomic (days to flowering, days to maturity, plant height, seed yield and seed weight), seed morphology (shape and dimpling), and seed quality (protein, starch, and fiber concentrations) traits of field pea (Pisum sativum L.). A collection of 135 pea accessions from 23 different breeding programs in Africa (Ethiopia), Asia (India), Australia, Europe (Belarus, Czech Republic, Denmark, France, Lithuania, Netherlands, Russia, Sweden, Ukraine and United Kingdom), and North America (Canada and USA), was used for the GWAS. The accessions were genotyped using genotyping-by-sequencing (GBS). After filtering for a minimum read depth of five, and minor allele frequency of 0.05, 16,877 high quality SNPs were selected to determine marker-trait associations (MTA). The LD decay (LD1/2max,90) across the chromosomes varied from 20 to 80 kb. Population structure analysis grouped the accessions into nine subpopulations. The accessions were evaluated in multi-year, multi-location trials in Olomouc (Czech Republic), Fargo, North Dakota (USA), and Rosthern and Sutherland, Saskatchewan (Canada) from 2013 to 2017. Each trait was phenotyped in at least five location-years. MTAs that were consistent across multiple trials were identified. Chr5LG3_566189651 and Chr5LG3_572899434 for plant height, Chr2LG1_409403647 for lodging resistance, Chr1LG6_57305683 and Chr1LG6_366513463 for grain yield, Chr1LG6_176606388, Chr2LG1_457185, Chr3LG5_234519042 and Chr7LG7_8229439 for seed starch concentration, and Chr3LG5_194530376 for seed protein concentration were identified from different locations and years. This research identified SNP markers associated with important traits in pea that have potential for marker-assisted selection towards rapid cultivar improvement.
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Affiliation(s)
- Krishna Kishore Gali
- Crop Development Centre, Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK, Canada
| | - Alison Sackville
- Crop Development Centre, Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK, Canada
| | - Endale G. Tafesse
- Crop Development Centre, Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK, Canada
| | | | - Kevin McPhee
- Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT, United States
| | - Mick Hybl
- Crop Research Institute/Department of Genetic Resources for Vegetables, Medicinal and Special Plants, Olomouc, Czechia
| | - Alexander Mikić
- Forage Crops Department, Institute of Field and Vegetable Crops, Novi Sad, Serbia
| | - Petr Smýkal
- Department of Botany, Palacký University, Olomouc, Czechia
| | - Rebecca McGee
- Grain Legume Genetics and Physiology Research Unit, USDA, ARS, Pullman, WA, United States
| | | | - Claire Domoney
- Department of Metabolic Biology, John Innes Centre, Norwich, United Kingdom
| | - T.H. Noel Ellis
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Bunyamin Tar'an
- Crop Development Centre, Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK, Canada
| | - Thomas D. Warkentin
- Crop Development Centre, Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK, Canada
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Powers SE, Thavarajah D. Checking Agriculture's Pulse: Field Pea ( Pisum Sativum L.), Sustainability, and Phosphorus Use Efficiency. FRONTIERS IN PLANT SCIENCE 2019; 10:1489. [PMID: 31803218 PMCID: PMC6873872 DOI: 10.3389/fpls.2019.01489] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 10/28/2019] [Indexed: 05/10/2023]
Abstract
Investigations regarding the incorporation of better sustainable production strategies into current agricultural-food systems are necessary to grow crops that reduce negative impacts on the environment yet will meet the production and nutritional demand of 10 billion people by 2050. The introduction of organic, alternative staple food crops, such as nutrient-dense field pea (Pisum sativum L.), to the everyday diet, may alleviate micronutrient malnutrition and incorporate more sustainable agriculture practices globally. Varieties are grown in organic systems currently yield less than conventionally produced foods, with less bioavailable nutrients, due to poor soil nutrient content. One of the most limiting nutrients for field pea is phosphorus (P) because this legume crop requires significant inputs for nodule formation. Therefore, P use efficiency (PUE) should be a breeding target for sustainable agriculture and biofortification efforts; the important role of the soil microbiome in nutrient acquisition should also be examined. The objectives of this review are to highlight the benefits of field pea for organic agriculture and human health, and discuss nutritional breeding strategies to increase field pea production in organic systems. Field pea and other pulse crops are underrepresented in agricultural research, yet are important crops for a sustainable future and better food systems. Furthermore, because field pea is consumed globally by both developed and at-risk populations, research efforts could help increase global health overall and combat micronutrient malnutrition.
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Affiliation(s)
| | - Dil Thavarajah
- Plant and Environmental Sciences, 270 Poole Agricultural Center, Clemson University, Clemson, SC, United States
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Wille L, Messmer MM, Studer B, Hohmann P. Insights to plant-microbe interactions provide opportunities to improve resistance breeding against root diseases in grain legumes. PLANT, CELL & ENVIRONMENT 2019; 42:20-40. [PMID: 29645277 DOI: 10.1111/pce.13214] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Revised: 03/26/2018] [Accepted: 03/27/2018] [Indexed: 05/19/2023]
Abstract
Root and foot diseases severely impede grain legume cultivation worldwide. Breeding lines with resistance against individual pathogens exist, but these resistances are often overcome by the interaction of multiple pathogens in field situations. Novel tools allow to decipher plant-microbiome interactions in unprecedented detail and provide insights into resistance mechanisms that consider both simultaneous attacks of various pathogens and the interplay with beneficial microbes. Although it has become clear that plant-associated microbes play a key role in plant health, a systematic picture of how and to what extent plants can shape their own detrimental or beneficial microbiome remains to be drawn. There is increasing evidence for the existence of genetic variation in the regulation of plant-microbe interactions that can be exploited by plant breeders. We propose to consider the entire plant holobiont in resistance breeding strategies in order to unravel hidden parts of complex defence mechanisms. This review summarizes (a) the current knowledge of resistance against soil-borne pathogens in grain legumes, (b) evidence for genetic variation for rhizosphere-related traits, (c) the role of root exudation in microbe-mediated disease resistance and elaborates (d) how these traits can be incorporated in resistance breeding programmes.
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Affiliation(s)
- Lukas Wille
- Department of Crop Sciences, Research Institute of Organic Agriculture (FiBL), 5070, Frick, Switzerland
- Molecular Plant Breeding, Institute of Agricultural Sciences, ETH Zürich, 8092, Zurich, Switzerland
| | - Monika M Messmer
- Department of Crop Sciences, Research Institute of Organic Agriculture (FiBL), 5070, Frick, Switzerland
| | - Bruno Studer
- Molecular Plant Breeding, Institute of Agricultural Sciences, ETH Zürich, 8092, Zurich, Switzerland
| | - Pierre Hohmann
- Department of Crop Sciences, Research Institute of Organic Agriculture (FiBL), 5070, Frick, Switzerland
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Trněný O, Brus J, Hradilová I, Rathore A, Das RR, Kopecký P, Coyne CJ, Reeves P, Richards C, Smýkal P. Molecular Evidence for Two Domestication Events in the Pea Crop. Genes (Basel) 2018; 9:genes9110535. [PMID: 30404223 PMCID: PMC6265838 DOI: 10.3390/genes9110535] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 10/25/2018] [Accepted: 10/29/2018] [Indexed: 12/02/2022] Open
Abstract
Pea, one of the founder crops from the Near East, has two wild species: Pisum sativum subsp. elatius, with a wide distribution centered in the Mediterranean, and P. fulvum, which is restricted to Syria, Lebanon, Israel, Palestine and Jordan. Using genome wide analysis of 11,343 polymorphic single nucleotide polymorphisms (SNPs) on a set of wild P. elatius (134) and P. fulvum (20) and 74 domesticated accessions (64 P. sativum landraces and 10 P. abyssinicum), we demonstrated that domesticated P. sativum and the Ethiopian pea (P. abyssinicum) were derived from different P. elatius genepools. Therefore, pea has at least two domestication events. The analysis does not support a hybrid origin of P. abyssinicum, which was likely introduced into Ethiopia and Yemen followed by eco-geographic adaptation. Both P. sativum and P. abyssinicum share traits that are typical of domestication, such as non-dormant seeds. Non-dormant seeds were also found in several wild P. elatius accessions which could be the result of crop to wild introgression or natural variation that may have been present during pea domestication. A sub-group of P. elatius overlaps with P. sativum landraces. This may be a consequence of bidirectional gene-flow or may suggest that this group of P. elatius is the closest extant wild relative of P. sativum.
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Affiliation(s)
- Oldřich Trněný
- Agricultural Research Ltd., 66441 Troubsko, Czech Republic.
| | - Jan Brus
- Department of Geoinformatics, Palacký University, 783 71 Olomouc, Czech Republic.
| | - Iveta Hradilová
- Department of Botany, Palacký University, 783 71 Olomouc, Czech Republic.
| | - Abhishek Rathore
- The International Crops Research Institute for the Semi-Arid Tropics, Hyderabad, Telangana 502324, India.
| | - Roma R Das
- The International Crops Research Institute for the Semi-Arid Tropics, Hyderabad, Telangana 502324, India.
| | - Pavel Kopecký
- Crop Research Institute, The Centre of the Region Haná for biotechnological and Agricultural Research, 783 71 Olomouc, Czech Republic.
| | - Clarice J Coyne
- United States Department of Agriculture, Washington State University, Pullman, WA 99164-6402, USA.
| | - Patrick Reeves
- United States Department of Agriculture, National Laboratory for Genetic Resources Preservation, Fort Collins, CO 80521, USA.
| | - Christopher Richards
- United States Department of Agriculture, National Laboratory for Genetic Resources Preservation, Fort Collins, CO 80521, USA.
| | - Petr Smýkal
- Department of Botany, Palacký University, 783 71 Olomouc, Czech Republic.
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Chang H, Sang H, Wang J, McPhee KE, Zhuang X, Porter LD, Chilvers MI. Exploring the genetics of lesion and nodal resistance in pea ( Pisum sativum L.) to Sclerotinia sclerotiorum using genome-wide association studies and RNA-Seq. PLANT DIRECT 2018; 2:e00064. [PMID: 31245727 PMCID: PMC6508546 DOI: 10.1002/pld3.64] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 05/09/2018] [Accepted: 05/21/2018] [Indexed: 05/30/2023]
Abstract
The disease white mold caused by the fungus Sclerotinia sclerotiorum is a significant threat to pea production, and improved resistance to this disease is needed. Nodal resistance in plants is a phenomenon where a fungal infection is prevented from passing through a node, and the infection is limited to an internode region. Nodal resistance has been observed in some pathosystems such as the pea (Pisum sativum L.)-S. sclerotiorum pathosystem. In addition to nodal resistance, different pea lines display different levels of stem lesion size restriction, referred to as lesion resistance. It is unclear whether the genetics of lesion resistance and nodal resistance are identical or different. This study applied genome-wide association studies (GWAS) and RNA-Seq to understand the genetic makeup of these two types of resistance. The time series RNA-Seq experiment consisted of two pea lines (the susceptible 'Lifter' and the partially resistant PI 240515), two treatments (mock inoculated samples and S. sclerotiorum-inoculated samples), and three time points (12, 24, and 48 hr post inoculation). Integrated results from GWAS and RNA-Seq analyses identified different redox-related transcripts for lesion and nodal resistances. A transcript encoding a glutathione S-transferase was the only shared resistance variant for both phenotypes. There were more leucine rich-repeat containing transcripts found for lesion resistance, while different candidate resistance transcripts such as a VQ motif-containing protein and a myo-inositol oxygenase were found for nodal resistance. This study demonstrated the robustness of combining GWAS and RNA-Seq for identifying white mold resistance in pea, and results suggest different genetics underlying lesion and nodal resistance.
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Affiliation(s)
- Hao‐Xun Chang
- Department of Plant, Soil and Microbial SciencesMichigan State UniversityEast LansingMichigan
| | - Hyunkyu Sang
- Department of Plant, Soil and Microbial SciencesMichigan State UniversityEast LansingMichigan
| | - Jie Wang
- Department of Plant BiologyMichigan State UniversityEast LansingMichigan
| | - Kevin E. McPhee
- Department of Plant Sciences and Plant PathologyMontana State UniversityBozemanMontana
| | - Xiaofeng Zhuang
- Department of Horticulture and Crop ScienceThe Ohio State UniversityWoosterOhio
| | | | - Martin I. Chilvers
- Department of Plant, Soil and Microbial SciencesMichigan State UniversityEast LansingMichigan
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Smýkal P, Trněný O, Brus J, Hanáček P, Rathore A, Roma RD, Pechanec V, Duchoslav M, Bhattacharyya D, Bariotakis M, Pirintsos S, Berger J, Toker C. Genetic structure of wild pea (Pisum sativum subsp. elatius) populations in the northern part of the Fertile Crescent reflects moderate cross-pollination and strong effect of geographic but not environmental distance. PLoS One 2018; 13:e0194056. [PMID: 29579076 PMCID: PMC5868773 DOI: 10.1371/journal.pone.0194056] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 02/24/2018] [Indexed: 01/19/2023] Open
Abstract
Knowledge of current genetic diversity and mating systems of crop wild relatives (CWR) in the Fertile Crescent is important in crop genetic improvement, because western agriculture began in the area after the cold-dry period known as Younger Dryas about 12,000 years ago and these species are also wild genepools of the world's most important food crops. Wild pea (Pisum sativum subsp. elatius) is an important source of genetic diversity for further pea crop improvement harbouring traits useful in climate change context. The genetic structure was assessed on 187 individuals of Pisum sativum subsp. elatius from fourteen populations collected in the northern part of the Fertile Crescent using 18,397 genome wide single nucleotide polymorphism DARTseq markers. AMOVA showed that 63% of the allelic variation was distributed between populations and 19% between individuals within populations. Four populations were found to contain admixed individuals. The observed heterozygosity ranged between 0.99 to 6.26% with estimated self-pollination rate between 47 to 90%. Genetic distances of wild pea populations were correlated with geographic but not environmental (climatic) distances and support a mixed mating system with predominant self-pollination. Niche modelling with future climatic projections showed a local decline in habitats suitable for wild pea, making a strong case for further collection and ex situ conservation.
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Affiliation(s)
- Petr Smýkal
- Department of Botany, Palacký University, Olomouc, Czech Republic
| | | | - Jan Brus
- Department of Geoinformatics, Palacký University, Olomouc, Czech Republic
| | - Pavel Hanáček
- Department of Plant Biology, Mendel University, Brno, Czech Republic
| | | | | | - Vilém Pechanec
- Department of Geoinformatics, Palacký University, Olomouc, Czech Republic
| | - Martin Duchoslav
- Department of Botany, Palacký University, Olomouc, Czech Republic
| | | | - Michalis Bariotakis
- Department of Biology and Botanical Garden, University of Crete, Heraklion, Greece
| | - Stergios Pirintsos
- Department of Biology and Botanical Garden, University of Crete, Heraklion, Greece
| | - Jens Berger
- CSIRO Agriculture and Food, Wembley, Western Australia, Australia
| | - Cengiz Toker
- Department of Field Crops, Akdeniz University, Antalya, Turkey
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27
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Smýkal P, Hradilová I, Trněný O, Brus J, Rathore A, Bariotakis M, Das RR, Bhattacharyya D, Richards C, Coyne CJ, Pirintsos S. Genomic diversity and macroecology of the crop wild relatives of domesticated pea. Sci Rep 2017; 7:17384. [PMID: 29234080 PMCID: PMC5727218 DOI: 10.1038/s41598-017-17623-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 11/29/2017] [Indexed: 11/09/2022] Open
Abstract
There is growing interest in the conservation and utilization of crop wild relatives (CWR) in international food security policy and research. Legumes play an important role in human health, sustainable food production, global food security, and the resilience of current agricultural systems. Pea belongs to the ancient set of cultivated plants of the Near East domestication center and remains an important crop today. Based on genome-wide analysis, P. fulvum was identified as a well-supported species, while the diversity of wild P. sativum subsp. elatius was structured into 5 partly geographically positioned clusters. We explored the spatial and environmental patterns of two progenitor species of domesticated pea in the Mediterranean Basin and in the Fertile Crescent in relation to the past and current climate. This study revealed that isolation by distance does not explain the genetic structure of P. sativum subsp. elatius in its westward expansion from its center of origin. The genetic diversity of wild pea may be driven by Miocene-Pliocene events, while the phylogenetic diversity centers may reflect Pleisto-Holocene climatic changes. These findings help set research and discussion priorities and provide geographical and ecological information for germplasm-collecting missions, as well as for the preservation of extant diversity in ex-situ collections.
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Affiliation(s)
- Petr Smýkal
- Department of Botany, Palacký University in Olomouc, Olomouc, Czech Republic.
| | - Iveta Hradilová
- Department of Botany, Palacký University in Olomouc, Olomouc, Czech Republic
| | | | - Jan Brus
- Department of Geoinformatics, Palacký University in Olomouc, Olomouc, Czech Republic
| | - Abhishek Rathore
- The International Crops Research Institute for the Semi-Arid Tropics, Hyderabad, India
| | - Michael Bariotakis
- Department of Biology and Botanical Garden, University of Crete, Heraklion, Greece
| | - Roma Rani Das
- The International Crops Research Institute for the Semi-Arid Tropics, Hyderabad, India
| | | | - Christopher Richards
- United States Department of Agriculture, National Laboratory for Genetic Resources Preservation, Fort Collins, USA
| | - Clarice J Coyne
- United States Department of Agriculture, Washington State University, Pullman, Washington, USA
| | - Stergios Pirintsos
- Department of Biology and Botanical Garden, University of Crete, Heraklion, Greece
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