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Zhao G, Liu Y, Li L, Che R, Douglass M, Benza K, Angove M, Luo K, Hu Q, Chen X, Henry C, Li Z, Ning G, Luo H. Gene pyramiding for boosted plant growth and broad abiotic stress tolerance. PLANT BIOTECHNOLOGY JOURNAL 2024; 22:678-697. [PMID: 37902192 PMCID: PMC10893947 DOI: 10.1111/pbi.14216] [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: 10/02/2022] [Revised: 09/24/2023] [Accepted: 10/16/2023] [Indexed: 10/31/2023]
Abstract
Abiotic stresses such as salinity, heat and drought seriously impair plant growth and development, causing a significant loss in crop yield and ornamental value. Biotechnology approaches manipulating specific genes prove to be effective strategies in crop trait modification. The Arabidopsis vacuolar pyrophosphatase gene AVP1, the rice SUMO E3 ligase gene OsSIZ1 and the cyanobacterium flavodoxin gene Fld have previously been implicated in regulating plant stress responses and conferring enhanced tolerance to different abiotic stresses when individually overexpressed in various plant species. We have explored the feasibility of combining multiple favourable traits brought by individual genes to acquire superior plant performance. To this end, we have simultaneously introduced AVP1, OsSIZ1 and Fld in creeping bentgrass. Transgenic (TG) plants overexpressing these three genes performed significantly better than wild type controls and the TGs expressing individual genes under both normal and various abiotic stress conditions, exhibited significantly enhanced plant growth and tolerance to drought, salinity and heat stresses as well as nitrogen and phosphate starvation, which were associated with altered physiological and biochemical characteristics and delicately fine-tuned expression of genes involved in plant stress responses. Our results suggest that AVP1, OsSIZ1 and Fld function synergistically to regulate plant development and plant stress response, leading to superior overall performance under both normal and adverse environments. The information obtained provides new insights into gene stacking as an effective approach for plant genetic engineering. A similar strategy can be extended for the use of other beneficial genes in various crop species for trait modifications, enhancing agricultural production.
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Affiliation(s)
- Guiqin Zhao
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
- College of Grassland ScienceGansu Agricultural UniversityLanzhouGansuChina
| | - Yu Liu
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
- College of Landscape ArchitectureNortheast Forestry UniversityHarbinHeilongjiangChina
| | - Lei Li
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
- College of AgronomyHenan Agricultural UniversityZhengzhouHenanChina
| | - Rui Che
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
| | - Megan Douglass
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
| | - Katherine Benza
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
| | - Mitchell Angove
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
| | - Kristopher Luo
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
| | - Qian Hu
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
| | - Xiaotong Chen
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
| | - Charles Henry
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
| | - Zhigang Li
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
| | - Guogui Ning
- Key laboratory of Horticultural Plant Biology, Ministry of EducationHuazhong Agricultural UniversityWuhanChina
| | - Hong Luo
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
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2
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Xiong W, Berke L, Michelmore R, van Workum DJM, Becker FFM, Schijlen E, Bakker LV, Peters S, van Treuren R, Jeuken M, Bouwmeester K, Schranz ME. The genome of Lactuca saligna, a wild relative of lettuce, provides insight into non-host resistance to the downy mildew Bremia lactucae. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 115:108-126. [PMID: 36987839 DOI: 10.1111/tpj.16212] [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: 10/29/2022] [Revised: 02/20/2023] [Accepted: 02/27/2023] [Indexed: 06/19/2023]
Abstract
Lactuca saligna L. is a wild relative of cultivated lettuce (Lactuca sativa L.), with which it is partially interfertile. Hybrid progeny suffer from hybrid incompatibility (HI), resulting in reduced fertility and distorted transmission ratios. Lactuca saligna displays broad-spectrum resistance against lettuce downy mildew caused by Bremia lactucae Regel and is considered a non-host species. This phenomenon of resistance in L. saligna is called non-host resistance (NHR). One possible mechanism behind this NHR is through the plant-pathogen interaction triggered by pathogen recognition receptors, including nucleotide-binding leucine-rich repeat (NLR) proteins and receptor-like kinases (RLKs). We report a chromosome-level genome assembly of L. saligna (accession CGN05327), leading to the identification of two large paracentric inversions (>50 Mb) between L. saligna and L. sativa. Genome-wide searches delineated the major resistance clusters as regions enriched in NLRs and RLKs. Three of the enriched regions co-locate with previously identified NHR intervals. RNA-seq analysis of Bremia-infected lettuce identified several differentially expressed RLKs in NHR regions. Three tandem wall-associated kinase-encoding genes (WAKs) in the NHR8 interval display particularly high expression changes at an early stage of infection. We propose RLKs as strong candidates for determinants of the NHR phenotype of L. saligna.
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Affiliation(s)
- Wei Xiong
- Biosystematics Group, Wageningen University and Research, Wageningen, The Netherlands
| | - Lidija Berke
- Biosystematics Group, Wageningen University and Research, Wageningen, The Netherlands
| | - Richard Michelmore
- Genome Center and Department of Plant Sciences, University of California, Davis, CA, USA
| | | | - Frank F M Becker
- Biosystematics Group, Wageningen University and Research, Wageningen, The Netherlands
| | - Elio Schijlen
- Bioscience, Wageningen University and Research, Wageningen, The Netherlands
| | - Linda V Bakker
- Bioscience, Wageningen University and Research, Wageningen, The Netherlands
| | - Sander Peters
- Bioscience, Wageningen University and Research, Wageningen, The Netherlands
| | - Rob van Treuren
- Centre for Genetic Resources, The Netherlands (CGN), Wageningen University and Research, Wageningen, The Netherlands
| | - Marieke Jeuken
- Plant Breeding, Wageningen University and Research, Wageningen, The Netherlands
| | - Klaas Bouwmeester
- Biosystematics Group, Wageningen University and Research, Wageningen, The Netherlands
| | - M Eric Schranz
- Biosystematics Group, Wageningen University and Research, Wageningen, The Netherlands
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3
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Quillévéré-Hamard A, Le Roy G, Lesné A, Le May C, Pilet-Nayel ML. Aggressiveness of Diverse French Aphanomyces euteiches Isolates on Pea Near Isogenic Lines Differing in Resistance Quantitative Trait Loci. PHYTOPATHOLOGY 2021; 111:695-702. [PMID: 32781903 DOI: 10.1094/phyto-04-20-0147-r] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Aphanomyces root rot is a major disease in many pea growing regions worldwide. Development of resistant varieties is necessary to manage the disease. Near isogenic lines (NILs) carrying resistance alleles at main quantitative trait loci (QTLs) were developed by marker-assisted backcrossing. This study aimed to evaluate the aggressiveness of diverse French isolates of Aphanomyces euteiches on NILs carrying different resistance QTLs. Forty-three A. euteiches isolates from different French pea growing regions were tested for aggressiveness on eight NILs carrying single or combinations of resistance QTLs and two susceptible or resistant control lines, in controlled conditions. Three clusters of isolates, unrelated to geographical origin, were identified, including 37, 56, and 7% of isolates with high, moderate, and low average levels of aggressiveness, respectively. Three groups of pea lines were also identified. The first group consisted of a pea resistant control line, moderately to highly resistant to all of the isolates. The second group included five NILs carrying a major-effect resistance allele at QTL Ae-Ps7.6, with a medium to broad range of effects on the isolates. The third group consisted of three NILs carrying minor-effect resistance alleles, with a narrow range of effects on the isolates. The results suggest that highly aggressive isolates occur naturally, which may be selected by future partially resistant pea varieties carrying QTLs and increase the risk of erosion of QTL effect. QTL pyramiding strategies for a higher level and a broader range of effect of quantitative resistance on A. euteiches populations will be required for breeding for durable pea resistant varieties.
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Affiliation(s)
| | - Gwenola Le Roy
- IGEPP, INRAE, Institut Agro, Univ Rennes, 35653, Le Rheu, France
| | - Angélique Lesné
- IGEPP, INRAE, Institut Agro, Univ Rennes, 35653, Le Rheu, France
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4
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Wan WL, Kim ST, Castel B, Charoennit N, Chae E. Genetics of autoimmunity in plants: an evolutionary genetics perspective. THE NEW PHYTOLOGIST 2021; 229:1215-1233. [PMID: 32970825 DOI: 10.1111/nph.16947] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 08/12/2020] [Indexed: 05/14/2023]
Abstract
Autoimmunity in plants has been found in numerous hybrids as a form of hybrid necrosis and mutant panels. Uncontrolled cell death is a main cellular outcome of autoimmunity, which negatively impacts growth. Its occurrence highlights the vulnerable nature of the plant immune system. Genetic investigation of autoimmunity in hybrid plants revealed that extreme variation in the immune receptor repertoire is a major contributor, reflecting an evolutionary conundrum that plants face in nature. In this review, we discuss natural variation in the plant immune system and its contribution to fitness. The value of autoimmunity genetics lies in its ability to identify combinations of a natural immune receptor and its partner that are predisposed to triggering autoimmunity. The network of immune components for autoimmunity becomes instrumental in revealing mechanistic details of how immune receptors recognize cellular invasion and activate signaling. The list of autoimmunity-risk variants also allows us to infer evolutionary processes contributing to their maintenance in the natural population. Our approach to autoimmunity, which integrates mechanistic understanding and evolutionary genetics, has the potential to serve as a prognosis tool to optimize immunity in crops.
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Affiliation(s)
- Wei-Lin Wan
- Department of Biological Sciences, National University of Singapore, Singapore, 117558, Singapore
| | - Sang-Tae Kim
- Department of Life Sciences, The Catholic University of Korea, Bucheon, Gyeonggi-do, 14662, South Korea
| | - Baptiste Castel
- Department of Biological Sciences, National University of Singapore, Singapore, 117558, Singapore
| | - Nuri Charoennit
- Department of Biological Sciences, National University of Singapore, Singapore, 117558, Singapore
| | - Eunyoung Chae
- Department of Biological Sciences, National University of Singapore, Singapore, 117558, Singapore
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Giesbers AKJ, den Boer E, Ulen JJWEH, van Kaauwen MPW, Visser RGF, Niks RE, Jeuken MJW. Patterns of Transmission Ratio Distortion in Interspecific Lettuce Hybrids Reveal a Sex-Independent Gametophytic Barrier. Genetics 2019; 211:263-276. [PMID: 30401697 PMCID: PMC6325705 DOI: 10.1534/genetics.118.301566] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 10/30/2018] [Indexed: 11/18/2022] Open
Abstract
Interspecific crosses can result in progeny with reduced vitality or fertility due to genetic incompatibilities between species, a phenomenon known as hybrid incompatibility (HI). HI is often caused by a bias against deleterious allele combinations, which results in transmission ratio distortion (TRD). Here, we determined the genome-wide distribution of HI between wild lettuce, Lactuca saligna, and cultivated lettuce, L. sativa, in a set of backcross inbred lines (BILs) with single introgression segments from L. saligna introgressed into a L. sativa genetic background. Almost all BILs contained an introgression segment in a homozygous state except a few BILs, for which we were able to obtain only a single heterozygous introgression. Their inbred progenies displayed severe TRD with a bias toward the L. sativa allele and complete nontransmission of the homozygous L. saligna introgression, i.e., absolute HI. These HI might be caused by deleterious heterospecific allele combinations at two loci. We used an multilocus segregating interspecific F2 population to identify candidate conspecific loci that can nullify the HI in BILs. Segregation analysis of developed double-introgression progenies showed nullification of three HI and proved that these HI are explained by nuclear pairwise incompatibilities. One of these digenic HI showed 29% reduced seed set and its pattern of TRD pointed to a sex-independent gametophytic barrier. Namely, this HI was caused by complete nontransmission of one heterospecific allele combination at the haploid stage, surprisingly in both male and female gametophytes. Our study shows that two-locus incompatibility systems contribute to reproductive barriers among Lactuca species.
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Affiliation(s)
- Anne K J Giesbers
- Plant Breeding, Wageningen University and Research, 6708 PB Wageningen, The Netherlands
| | - Erik den Boer
- Plant Breeding, Wageningen University and Research, 6708 PB Wageningen, The Netherlands
| | | | | | - Richard G F Visser
- Plant Breeding, Wageningen University and Research, 6708 PB Wageningen, The Netherlands
| | - Rients E Niks
- Plant Breeding, Wageningen University and Research, 6708 PB Wageningen, The Netherlands
| | - Marieke J W Jeuken
- Plant Breeding, Wageningen University and Research, 6708 PB Wageningen, The Netherlands
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6
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Giesbers AKJ, Boer ED, Braspenning DNJ, Bouten TPH, Specken JW, van Kaauwen MPW, Visser RGF, Niks RE, Jeuken MJW. Bidirectional backcrosses between wild and cultivated lettuce identify loci involved in nonhost resistance to downy mildew. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2018; 131:1761-1776. [PMID: 29802449 PMCID: PMC6061147 DOI: 10.1007/s00122-018-3112-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 05/07/2018] [Indexed: 05/31/2023]
Abstract
KEY MESSAGE The nonhost resistance of wild lettuce to lettuce downy mildew seems explained by four components of a putative set of epistatic genes. The commonplace observation that plants are immune to most potential pathogens is known as nonhost resistance (NHR). The genetic basis of NHR is poorly understood. Inheritance studies of NHR require crosses of nonhost species with a host, but these crosses are usually unsuccessful. The plant-pathosystem of lettuce and downy mildew, Bremia lactucae, provides a rare opportunity to study the inheritance of NHR, because the nonhost wild lettuce species Lactuca saligna is sufficiently cross-compatible with the cultivated host Lactuca sativa. Our previous studies on NHR in one L. saligna accession led to the hypothesis that multi-locus epistatic interactions might explain NHR. Here, we studied NHR at the species level in nine accessions. Besides the commonly used approach of studying a target trait from a wild donor species in a cultivar genetic background, we also explored the opposite, complementary approach of cultivar introgression in a wild species background. This bidirectional approach encompassed (1) nonhost into host introgression: identification of L. saligna derived chromosome regions that were overrepresented in highly resistant BC1 plants (F1 × L. sativa), (2) host into nonhost introgression: identification of L. sativa derived chromosome regions that were overrepresented in BC1 inbred lines (F1 × L. saligna) with relatively high infection levels. We demonstrated that NHR is based on resistance factors from L. saligna and the genetic dose for NHR differs between accessions. NHR seemed explained by combinations of epistatic genes on three or four chromosome segments, of which one chromosome segment was validated by the host into nonhost approach.
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Affiliation(s)
- Anne K J Giesbers
- Plant Breeding, Wageningen University & Research, PO Box 386, 6700 AJ, Wageningen, The Netherlands
- Michelmore Lab, The Genome Center, Department of Plant Sciences, University of California, Davis, CA, 95616, USA
| | - Erik den Boer
- Plant Breeding, Wageningen University & Research, PO Box 386, 6700 AJ, Wageningen, The Netherlands
- Rijk Zwaan, 2678 ZG, De Lier, The Netherlands
| | - David N J Braspenning
- Plant Breeding, Wageningen University & Research, PO Box 386, 6700 AJ, Wageningen, The Netherlands
- Limgroup, Veld Oostenrijk 13, 5961 NV, Horst, The Netherlands
| | - Thijs P H Bouten
- Plant Breeding, Wageningen University & Research, PO Box 386, 6700 AJ, Wageningen, The Netherlands
- Limgroup, Veld Oostenrijk 13, 5961 NV, Horst, The Netherlands
| | - Johan W Specken
- Plant Breeding, Wageningen University & Research, PO Box 386, 6700 AJ, Wageningen, The Netherlands
- PAGV, Wageningen University & Research, Edelhertweg 1, 8219 PH, Lelystad, The Netherlands
| | - Martijn P W van Kaauwen
- Plant Breeding, Wageningen University & Research, PO Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Richard G F Visser
- Plant Breeding, Wageningen University & Research, PO Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Rients E Niks
- Plant Breeding, Wageningen University & Research, PO Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Marieke J W Jeuken
- Plant Breeding, Wageningen University & Research, PO Box 386, 6700 AJ, Wageningen, The Netherlands.
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7
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Nelson R, Wiesner-Hanks T, Wisser R, Balint-Kurti P. Navigating complexity to breed disease-resistant crops. Nat Rev Genet 2017; 19:21-33. [PMID: 29109524 DOI: 10.1038/nrg.2017.82] [Citation(s) in RCA: 205] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Plant diseases are responsible for substantial crop losses each year and pose a threat to global food security and agricultural sustainability. Improving crop resistance to pathogens through breeding is an environmentally sound method for managing disease and minimizing these losses. However, it is challenging to breed varieties with resistance that is effective, stable and broad-spectrum. Recent advances in genetic and genomic technologies have contributed to a better understanding of the complexity of host-pathogen interactions and have identified some of the genes and mechanisms that underlie resistance. This new knowledge is benefiting crop improvement through better-informed breeding strategies that utilize diverse forms of resistance at different scales, from the genome of a single plant to the plant varieties deployed across a region.
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Affiliation(s)
- Rebecca Nelson
- School of Integrative Plant Science, Cornell University, Ithaca, New York 14853, USA
| | - Tyr Wiesner-Hanks
- School of Integrative Plant Science, Cornell University, Ithaca, New York 14853, USA
| | - Randall Wisser
- Department of Plant and Soil Sciences, University of Delaware, Newark, Delaware 19716, USA
| | - Peter Balint-Kurti
- United States Department of Agriculture Agricultural Research Service (USDA-ARS), Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, North Carolina 27695-7616, USA
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8
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Giesbers AKJ, Pelgrom AJE, Visser RGF, Niks RE, Van den Ackerveken G, Jeuken MJW. Effector-mediated discovery of a novel resistance gene against Bremia lactucae in a nonhost lettuce species. THE NEW PHYTOLOGIST 2017; 216:915-926. [PMID: 28833168 PMCID: PMC5656935 DOI: 10.1111/nph.14741] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 06/26/2017] [Indexed: 05/03/2023]
Abstract
Candidate effectors from lettuce downy mildew (Bremia lactucae) enable high-throughput germplasm screening for the presence of resistance (R) genes. The nonhost species Lactuca saligna comprises a source of B. lactucae R genes that has hardly been exploited in lettuce breeding. Its cross-compatibility with the host species L. sativa enables the study of inheritance of nonhost resistance (NHR). We performed transient expression of candidate RXLR effector genes from B. lactucae in a diverse Lactuca germplasm set. Responses to two candidate effectors (BLR31 and BLN08) were genetically mapped and tested for co-segregation with disease resistance. BLN08 induced a hypersensitive response (HR) in 55% of the L. saligna accessions, but responsiveness did not co-segregate with resistance to Bl:24. BLR31 triggered an HR in 5% of the L. saligna accessions, and revealed a novel R gene providing complete B. lactucae race Bl:24 resistance. Resistant hybrid plants that were BLR31 nonresponsive indicated other unlinked R genes and/or nonhost QTLs. We have identified a candidate avirulence effector of B. lactucae (BLR31) and its cognate R gene in L. saligna. Concurrently, our results suggest that R genes are not required for NHR of L. saligna.
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Affiliation(s)
- Anne K. J. Giesbers
- Laboratory of Plant BreedingWageningen University & Research6700AJ Wageningenthe Netherlands
| | - Alexandra J. E. Pelgrom
- Plant–Microbe InteractionsDepartment of BiologyUtrecht University3584CH Utrechtthe Netherlands
| | - Richard G. F. Visser
- Laboratory of Plant BreedingWageningen University & Research6700AJ Wageningenthe Netherlands
| | - Rients E. Niks
- Laboratory of Plant BreedingWageningen University & Research6700AJ Wageningenthe Netherlands
| | | | - Marieke J. W. Jeuken
- Laboratory of Plant BreedingWageningen University & Research6700AJ Wageningenthe Netherlands
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9
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Pyne R, Honig J, Vaiciunas J, Koroch A, Wyenandt C, Bonos S, Simon J. A first linkage map and downy mildew resistance QTL discovery for sweet basil (Ocimum basilicum) facilitated by double digestion restriction site associated DNA sequencing (ddRADseq). PLoS One 2017; 12:e0184319. [PMID: 28922359 PMCID: PMC5603166 DOI: 10.1371/journal.pone.0184319] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 08/22/2017] [Indexed: 12/15/2022] Open
Abstract
Limited understanding of sweet basil (Ocimum basilicum L.) genetics and genome structure has reduced efficiency of breeding strategies. This is evidenced by the rapid, worldwide dissemination of basil downy mildew (Peronospora belbahrii) in the absence of resistant cultivars. In an effort to improve available genetic resources, expressed sequence tag simple sequence repeat (EST-SSR) and single nucleotide polymorphism (SNP) markers were developed and used to genotype the MRI x SB22 F2 mapping population, which segregates for response to downy mildew. SNP markers were generated from genomic sequences derived from double digestion restriction site associated DNA sequencing (ddRADseq). Disomic segregation was observed in both SNP and EST-SSR markers providing evidence of an O. basilicum allotetraploid genome structure and allowing for subsequent analysis of the mapping population as a diploid intercross. A dense linkage map was constructed using 42 EST-SSR and 1,847 SNP markers spanning 3,030.9 cM. Multiple quantitative trait loci (QTL) model (MQM) analysis identified three QTL that explained 37-55% of phenotypic variance associated with downy mildew response across three environments. A single major QTL, dm11.1 explained 21-28% of phenotypic variance and demonstrated dominant gene action. Two minor QTL dm9.1 and dm14.1 explained 5-16% and 4-18% of phenotypic variance, respectively. Evidence is provided for an additive effect between the two minor QTL and the major QTL dm11.1 increasing downy mildew susceptibility. Results indicate that ddRADseq-facilitated SNP and SSR marker genotyping is an effective approach for mapping the sweet basil genome.
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Affiliation(s)
- Robert Pyne
- Department of Plant Biology, Rutgers University, New Brunswick, New Jersey, United States of America
| | - Josh Honig
- Department of Plant Biology, Rutgers University, New Brunswick, New Jersey, United States of America
| | - Jennifer Vaiciunas
- Department of Plant Biology, Rutgers University, New Brunswick, New Jersey, United States of America
| | - Adolfina Koroch
- Science Dept., Borough of Manhattan Community College, The City University of New York, New York, NY, United States of America
| | - Christian Wyenandt
- Department of Plant Biology, Rutgers University, New Brunswick, New Jersey, United States of America
| | - Stacy Bonos
- Department of Plant Biology, Rutgers University, New Brunswick, New Jersey, United States of America
| | - James Simon
- Department of Plant Biology, Rutgers University, New Brunswick, New Jersey, United States of America
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10
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Lee S, Whitaker VM, Hutton SF. Mini Review: Potential Applications of Non-host Resistance for Crop Improvement. FRONTIERS IN PLANT SCIENCE 2016; 7:997. [PMID: 27462329 PMCID: PMC4939297 DOI: 10.3389/fpls.2016.00997] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 06/24/2016] [Indexed: 05/18/2023]
Abstract
Plant breeding for disease resistance is crucial to sustain global crop production. For decades, plant breeders and researchers have extensively used host plant resistance genes (R-genes) to develop disease resistant cultivars. However, the general instability of R-genes in crop cultivars when challenged with diverse pathogen populations emphasizes the need for more stable means of resistance. Alternatively, non-host resistance is recognized as the most durable, broad-spectrum form of resistance against the majority of potential pathogens in plants and has gained great attention as an alternative target for managing resistance. While transgenic approaches have been utilized to transfer non-host resistance to host species, conventional breeding applications have been more elusive. Nevertheless, avenues for discovery and deployment of genetic loci for non-host resistance via hybridization are increasingly abundant, particularly when transferring genes among closely related species. In this mini review, we discuss current and developing applications of non-host resistance for crop improvement with a focus on the overlap between host and non-host mechanisms and the potential impacts of new technology.
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Affiliation(s)
- Seonghee Lee
- Department of Horticultural Science, Gulf Coast Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FLUSA
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11
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Wyenandt CA, Simon JE, Pyne RM, Homa K, McGrath MT, Zhang S, Raid RN, Ma LJ, Wick R, Guo L, Madeiras A. Basil Downy Mildew (Peronospora belbahrii): Discoveries and Challenges Relative to Its Control. PHYTOPATHOLOGY 2015; 105:885-94. [PMID: 25894318 DOI: 10.1094/phyto-02-15-0032-fi] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Basil (Ocimum spp.) is one of the most economically important and widely grown herbs in the world. Basil downy mildew, caused by Peronospora belbahrii, has become an important disease in sweet basil (O. basilicum) production worldwide in the past decade. Global sweet basil production is at significant risk to basil downy mildew because of the lack of genetic resistance and the ability of the pathogen to be distributed on infested seed. Controlling the disease is challenging and consequently many crops have been lost. In the past few years, plant breeding efforts have been made to identify germplasm that can be used to introduce downy mildew resistance genes into commercial sweet basils while ensuring that resistant plants have the correct phenotype, aroma, and tastes needed for market acceptability. Fungicide efficacy studies have been conducted to evaluate current and newly developed conventional and organic fungicides for its management with limited success. This review explores the current efforts and progress being made in understanding basil downy mildew and its control.
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Affiliation(s)
- Christian A Wyenandt
- First author, second, third, and fourth authors: Department of Plant Biology and Pathology, Rutgers University, Rutgers Agricultural Research and Extension Center, Bridgeton, NJ 08302; fifth author: Plant Pathology and Plant-Microbe Biology Section, School of Integrated Plant Sciences, Cornell University, Long Island Horticultural Research and Extension Center, Riverhead, NY 11901; sixth author: Department of Plant Pathology, University of Florida, IFAS, Tropical Research and Education Center, Homestead 33031; seventh author: Department of Plant Pathology, University of Florida, IFAS, Everglades Research and Education Center, Belle Glade 33430; eighth and tenth authors: Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst 01033; and ninth and eleventh authors: Stockbridge School of Agriculture, University of Massachusetts, Amherst 01033
| | - James E Simon
- First author, second, third, and fourth authors: Department of Plant Biology and Pathology, Rutgers University, Rutgers Agricultural Research and Extension Center, Bridgeton, NJ 08302; fifth author: Plant Pathology and Plant-Microbe Biology Section, School of Integrated Plant Sciences, Cornell University, Long Island Horticultural Research and Extension Center, Riverhead, NY 11901; sixth author: Department of Plant Pathology, University of Florida, IFAS, Tropical Research and Education Center, Homestead 33031; seventh author: Department of Plant Pathology, University of Florida, IFAS, Everglades Research and Education Center, Belle Glade 33430; eighth and tenth authors: Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst 01033; and ninth and eleventh authors: Stockbridge School of Agriculture, University of Massachusetts, Amherst 01033
| | - Robert M Pyne
- First author, second, third, and fourth authors: Department of Plant Biology and Pathology, Rutgers University, Rutgers Agricultural Research and Extension Center, Bridgeton, NJ 08302; fifth author: Plant Pathology and Plant-Microbe Biology Section, School of Integrated Plant Sciences, Cornell University, Long Island Horticultural Research and Extension Center, Riverhead, NY 11901; sixth author: Department of Plant Pathology, University of Florida, IFAS, Tropical Research and Education Center, Homestead 33031; seventh author: Department of Plant Pathology, University of Florida, IFAS, Everglades Research and Education Center, Belle Glade 33430; eighth and tenth authors: Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst 01033; and ninth and eleventh authors: Stockbridge School of Agriculture, University of Massachusetts, Amherst 01033
| | - Kathryn Homa
- First author, second, third, and fourth authors: Department of Plant Biology and Pathology, Rutgers University, Rutgers Agricultural Research and Extension Center, Bridgeton, NJ 08302; fifth author: Plant Pathology and Plant-Microbe Biology Section, School of Integrated Plant Sciences, Cornell University, Long Island Horticultural Research and Extension Center, Riverhead, NY 11901; sixth author: Department of Plant Pathology, University of Florida, IFAS, Tropical Research and Education Center, Homestead 33031; seventh author: Department of Plant Pathology, University of Florida, IFAS, Everglades Research and Education Center, Belle Glade 33430; eighth and tenth authors: Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst 01033; and ninth and eleventh authors: Stockbridge School of Agriculture, University of Massachusetts, Amherst 01033
| | - Margaret T McGrath
- First author, second, third, and fourth authors: Department of Plant Biology and Pathology, Rutgers University, Rutgers Agricultural Research and Extension Center, Bridgeton, NJ 08302; fifth author: Plant Pathology and Plant-Microbe Biology Section, School of Integrated Plant Sciences, Cornell University, Long Island Horticultural Research and Extension Center, Riverhead, NY 11901; sixth author: Department of Plant Pathology, University of Florida, IFAS, Tropical Research and Education Center, Homestead 33031; seventh author: Department of Plant Pathology, University of Florida, IFAS, Everglades Research and Education Center, Belle Glade 33430; eighth and tenth authors: Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst 01033; and ninth and eleventh authors: Stockbridge School of Agriculture, University of Massachusetts, Amherst 01033
| | - Shouan Zhang
- First author, second, third, and fourth authors: Department of Plant Biology and Pathology, Rutgers University, Rutgers Agricultural Research and Extension Center, Bridgeton, NJ 08302; fifth author: Plant Pathology and Plant-Microbe Biology Section, School of Integrated Plant Sciences, Cornell University, Long Island Horticultural Research and Extension Center, Riverhead, NY 11901; sixth author: Department of Plant Pathology, University of Florida, IFAS, Tropical Research and Education Center, Homestead 33031; seventh author: Department of Plant Pathology, University of Florida, IFAS, Everglades Research and Education Center, Belle Glade 33430; eighth and tenth authors: Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst 01033; and ninth and eleventh authors: Stockbridge School of Agriculture, University of Massachusetts, Amherst 01033
| | - Richard N Raid
- First author, second, third, and fourth authors: Department of Plant Biology and Pathology, Rutgers University, Rutgers Agricultural Research and Extension Center, Bridgeton, NJ 08302; fifth author: Plant Pathology and Plant-Microbe Biology Section, School of Integrated Plant Sciences, Cornell University, Long Island Horticultural Research and Extension Center, Riverhead, NY 11901; sixth author: Department of Plant Pathology, University of Florida, IFAS, Tropical Research and Education Center, Homestead 33031; seventh author: Department of Plant Pathology, University of Florida, IFAS, Everglades Research and Education Center, Belle Glade 33430; eighth and tenth authors: Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst 01033; and ninth and eleventh authors: Stockbridge School of Agriculture, University of Massachusetts, Amherst 01033
| | - Li-Jun Ma
- First author, second, third, and fourth authors: Department of Plant Biology and Pathology, Rutgers University, Rutgers Agricultural Research and Extension Center, Bridgeton, NJ 08302; fifth author: Plant Pathology and Plant-Microbe Biology Section, School of Integrated Plant Sciences, Cornell University, Long Island Horticultural Research and Extension Center, Riverhead, NY 11901; sixth author: Department of Plant Pathology, University of Florida, IFAS, Tropical Research and Education Center, Homestead 33031; seventh author: Department of Plant Pathology, University of Florida, IFAS, Everglades Research and Education Center, Belle Glade 33430; eighth and tenth authors: Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst 01033; and ninth and eleventh authors: Stockbridge School of Agriculture, University of Massachusetts, Amherst 01033
| | - Robert Wick
- First author, second, third, and fourth authors: Department of Plant Biology and Pathology, Rutgers University, Rutgers Agricultural Research and Extension Center, Bridgeton, NJ 08302; fifth author: Plant Pathology and Plant-Microbe Biology Section, School of Integrated Plant Sciences, Cornell University, Long Island Horticultural Research and Extension Center, Riverhead, NY 11901; sixth author: Department of Plant Pathology, University of Florida, IFAS, Tropical Research and Education Center, Homestead 33031; seventh author: Department of Plant Pathology, University of Florida, IFAS, Everglades Research and Education Center, Belle Glade 33430; eighth and tenth authors: Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst 01033; and ninth and eleventh authors: Stockbridge School of Agriculture, University of Massachusetts, Amherst 01033
| | - Li Guo
- First author, second, third, and fourth authors: Department of Plant Biology and Pathology, Rutgers University, Rutgers Agricultural Research and Extension Center, Bridgeton, NJ 08302; fifth author: Plant Pathology and Plant-Microbe Biology Section, School of Integrated Plant Sciences, Cornell University, Long Island Horticultural Research and Extension Center, Riverhead, NY 11901; sixth author: Department of Plant Pathology, University of Florida, IFAS, Tropical Research and Education Center, Homestead 33031; seventh author: Department of Plant Pathology, University of Florida, IFAS, Everglades Research and Education Center, Belle Glade 33430; eighth and tenth authors: Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst 01033; and ninth and eleventh authors: Stockbridge School of Agriculture, University of Massachusetts, Amherst 01033
| | - Angela Madeiras
- First author, second, third, and fourth authors: Department of Plant Biology and Pathology, Rutgers University, Rutgers Agricultural Research and Extension Center, Bridgeton, NJ 08302; fifth author: Plant Pathology and Plant-Microbe Biology Section, School of Integrated Plant Sciences, Cornell University, Long Island Horticultural Research and Extension Center, Riverhead, NY 11901; sixth author: Department of Plant Pathology, University of Florida, IFAS, Tropical Research and Education Center, Homestead 33031; seventh author: Department of Plant Pathology, University of Florida, IFAS, Everglades Research and Education Center, Belle Glade 33430; eighth and tenth authors: Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst 01033; and ninth and eleventh authors: Stockbridge School of Agriculture, University of Massachusetts, Amherst 01033
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