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Manicardi A, Scarabel L, Llenes JM, Montull JM, Osuna MD, Torra Farré J, Milani A. Genetic basis and origin of resistance to acetolactate synthase inhibitors in Amaranthus palmeri from Spain and Italy. PEST MANAGEMENT SCIENCE 2023; 79:4886-4896. [PMID: 37515753 DOI: 10.1002/ps.7690] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/19/2023] [Accepted: 07/29/2023] [Indexed: 07/31/2023]
Abstract
BACKGROUND Amaranthus palmeri is an aggressive annual weed native to the United States, which has become invasive in some European countries. Populations resistant to acetolactate synthase (ALS) inhibitors have been recorded in Spain and Italy, but the evolutionary origin of the resistance traits remains unknown. Bioassays were conducted to identify cross-resistance to ALS inhibitors and a haplotype-based genetic approach was used to elucidate the origin and distribution of resistance in both countries. RESULTS Amaranthus palmeri populations were resistant to thifensulfuron-methyl and imazamox, and the 574-Leu mutant ALS allele was found to be the main cause of resistance among them. In two Spanish populations, 376-Glu and 197-Thr mutant ALS alleles were also found. The haplotype analyses revealed the presence of two and four distinct 574-Leu mutant haplotypes in the Italian and Spanish populations, respectively. None was common to both countries, but some mutant haplotypes were shared between geographically close populations or between populations more than 100 km apart. Wide genetic diversity was found in two very close Spanish populations. CONCLUSION ALS-resistant A. palmeri populations were introduced to Italy and Spain from outside Europe. Populations from both countries have different evolutionary histories and originate from independent introduction events. ALS resistance then spread over short and long distances by seed dispersal. The higher number and genetic diversity among mutant haplotypes from the Spanish populations indicated recurrent invasions. The implementation of control tactics to limit seed dispersal and the establishment of A. palmeri is recommended in both countries. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Alfredo Manicardi
- Department of Forestry and Agricultural Science and Engineering, University of Lleida, Lleida, Spain
| | - Laura Scarabel
- Institute for Sustainable Plant Protection (IPSP), CNR, Legnaro, Italy
| | - Josep María Llenes
- Weed Science Unit of the Plant Protection Service, DARP, Generalitat de Catalunya, Lleida, Spain
| | - José María Montull
- Department of Forestry and Agricultural Science and Engineering, University of Lleida, Lleida, Spain
| | - María Dolores Osuna
- Plant Protection Department, Extremadura Scientific and Technological Research Center (CICYTEX), Badajoz, Spain
| | - Joel Torra Farré
- Department of Forestry and Agricultural Science and Engineering, University of Lleida, Lleida, Spain
| | - Andrea Milani
- Institute for Sustainable Plant Protection (IPSP), CNR, Legnaro, Italy
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González-Torralva F, Norsworthy JK. Quizalofop resistance in weedy rice (Oryza sativa L.) is mainly conferred by an Ile1781Leu mutation. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2023; 336:111838. [PMID: 37611832 DOI: 10.1016/j.plantsci.2023.111838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/26/2023] [Accepted: 08/19/2023] [Indexed: 08/25/2023]
Abstract
Weedy rice (Oryza sativa L.) is an economically important weed species in rice (Oryza sativa L.) cropping systems. Two weedy rice samples (acc7 and acc8) suspected to be resistant to quizalofop-ethyl (quizalofop) were collected in Arkansas. In this research, susceptibility to quizalofop and resistance mechanisms have been explored. Dose-response assays displayed a resistance index of 42- and 58-fold for the acc7 and acc8, respectively. Experiments with metabolism inhibitors demonstrated that NBD-Cl (4-chloro-7-nitrobenzofurazan) increased quizalofop efficacy slightly in acc8, whereas malathion did not improve effectiveness in resistant samples. Sequencing of the ACCase gene displayed an Ile1781Leu substitution in the resistant samples, like the mutation present in Provisia™ rice. In addition, an allele-specific PCR was developed to genotype the Ile1781Leu mutation. The gene copy number of ACCase showed similar values among samples. In the resistant plants, a KASP (Kompetitive Allele Specific PCR) assay to detect the ALSS653D (acetolactate synthase) and HIS1 (HPPD Inhibitor Sensitive 1) traits revealed that 37.5% of plants carried the ALSS653D trait, whereas 25% showed the HIS1 allele. In summary, a target-site mutation is the main resistance mechanism to quizalofop in weedy rice. Results also suggest the presence of herbicide metabolism (a non-target site resistance mechanism) mediated by glutathione-S-transferases (GSTs) in one resistant sample.
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Affiliation(s)
- Fidel González-Torralva
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA.
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
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Kalendar R, Baidyussen A, Serikbay D, Zotova L, Khassanova G, Kuzbakova M, Jatayev S, Hu YG, Schramm C, Anderson PA, Jenkins CLD, Soole KL, Shavrukov Y. Modified "Allele-Specific qPCR" Method for SNP Genotyping Based on FRET. FRONTIERS IN PLANT SCIENCE 2021; 12:747886. [PMID: 35082803 PMCID: PMC8784781 DOI: 10.3389/fpls.2021.747886] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 10/22/2021] [Indexed: 05/02/2023]
Abstract
The proposed method is a modified and improved version of the existing "Allele-specific q-PCR" (ASQ) method for genotyping of single nucleotide polymorphism (SNP) based on fluorescence resonance energy transfer (FRET). This method is similar to frequently used techniques like Amplifluor and Kompetitive allele specific PCR (KASP), as well as others employing common universal probes (UPs) for SNP analyses. In the proposed ASQ method, the fluorophores and quencher are located in separate complementary oligonucleotides. The ASQ method is based on the simultaneous presence in PCR of the following two components: an allele-specific mixture (allele-specific and common primers) and a template-independent detector mixture that contains two or more (up to four) universal probes (UP-1 to 4) and a single universal quencher oligonucleotide (Uni-Q). The SNP site is positioned preferably at a penultimate base in each allele-specific primer, which increases the reaction specificity and allele discrimination. The proposed ASQ method is advanced in providing a very clear and effective measurement of the fluorescence emitted, with very low signal background-noise, and simple procedures convenient for customized modifications and adjustments. Importantly, this ASQ method is estimated as two- to ten-fold cheaper than Amplifluor and KASP, and much cheaper than all those methods that rely on dual-labeled probes without universal components, like TaqMan and Molecular Beacons. Results for SNP genotyping in the barley genes HvSAP16 and HvSAP8, in which stress-associated proteins are controlled, are presented as proven and validated examples. This method is suitable for bi-allelic uniplex reactions but it can potentially be used for 3- or 4-allelic variants or different SNPs in a multiplex format in a range of applications including medical, forensic, or others involving SNP genotyping.
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Affiliation(s)
- Ruslan Kalendar
- National Laboratory Astana, Nazarbayev University, Nur-Sultan, Kazakhstan
- Institute of Biotechnology HiLIFE, University of Helsinki, Helsinki, Finland
- *Correspondence: Ruslan Kalendar
| | - Akmaral Baidyussen
- Faculty of Agronomy, S. Seifullin Kazakh AgroTechnical University, Nur-Sultan, Kazakhstan
| | - Dauren Serikbay
- Faculty of Agronomy, S. Seifullin Kazakh AgroTechnical University, Nur-Sultan, Kazakhstan
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, China
| | - Lyudmila Zotova
- Faculty of Agronomy, S. Seifullin Kazakh AgroTechnical University, Nur-Sultan, Kazakhstan
| | - Gulmira Khassanova
- Faculty of Agronomy, S. Seifullin Kazakh AgroTechnical University, Nur-Sultan, Kazakhstan
| | - Marzhan Kuzbakova
- Faculty of Agronomy, S. Seifullin Kazakh AgroTechnical University, Nur-Sultan, Kazakhstan
| | - Satyvaldy Jatayev
- Faculty of Agronomy, S. Seifullin Kazakh AgroTechnical University, Nur-Sultan, Kazakhstan
| | - Yin-Gang Hu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, China
| | - Carly Schramm
- College of Science and Engineering, Biological Sciences, Flinders University, Adelaide, SA, Australia
| | - Peter A. Anderson
- College of Science and Engineering, Biological Sciences, Flinders University, Adelaide, SA, Australia
| | - Colin L. D. Jenkins
- College of Science and Engineering, Biological Sciences, Flinders University, Adelaide, SA, Australia
| | - Kathleen L. Soole
- College of Science and Engineering, Biological Sciences, Flinders University, Adelaide, SA, Australia
| | - Yuri Shavrukov
- College of Science and Engineering, Biological Sciences, Flinders University, Adelaide, SA, Australia
- Yuri Shavrukov
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Presence of the HPPD Inhibitor Sensitive 1 Gene and ALS S653N Mutation in Weedy Oryza sativa Sensitive to Benzobicyclon. PLANTS 2020; 9:plants9111576. [PMID: 33202609 PMCID: PMC7697765 DOI: 10.3390/plants9111576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/10/2020] [Accepted: 11/11/2020] [Indexed: 11/17/2022]
Abstract
Benzobicyclon has shown varying results in controlling weedy rice, including those with imidazolinone (IMI) resistance. Tolerance to benzobicyclon in cultivated japonica rice, but not indica or aus-like cultivars, is conferred by a fully functional HPPD Inhibitor Sensitive 1 (HIS1) gene. Herein, a diagnostic Kompetitive Allele Specific PCR (KASP) assay was developed to predict the HIS1 genotype of weedy rice plants from 37 accessions and correlated to their response to benzobicyclon in the field. Two-thirds of the 693 weedy rice plants screened were tolerant to benzobicyclon (371 g ai ha−1, SC formulation) at 30 days after treatment (DAT). Thirty-four percent of plants were homozygous for the HIS1 allele and 98% of these plants exhibited field tolerance. However, the his1 genotype did not always correlate with field data. Only 52% of his1 plants were considered sensitive, indicating that the single nucleotide polymorphisms (SNPs) chosen in the KASP assay are not a reliable tool in predicting his1 homozygous plants. In an additional experiment, 86% of the 344 plants with at least one copy of the ALSS653N trait harbored a HIS1 allele, suggesting fields infested with IMI herbicide-resistant weedy rice are unlikely to be controlled with benzobicyclon.
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Dampanaboina L, Jiao Y, Chen J, Gladman N, Chopra R, Burow G, Hayes C, Christensen SA, Burke J, Ware D, Xin Z. Sorghum MSD3 Encodes an ω-3 Fatty Acid Desaturase that Increases Grain Number by Reducing Jasmonic Acid Levels. Int J Mol Sci 2019; 20:ijms20215359. [PMID: 31661847 PMCID: PMC6862555 DOI: 10.3390/ijms20215359] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 10/25/2019] [Accepted: 10/26/2019] [Indexed: 12/31/2022] Open
Abstract
Grain number per panicle is an important component of grain yield in sorghum (Sorghum bicolor (L.)) and other cereal crops. Previously, we reported that mutations in multi-seeded 1 (MSD1) and MSD2 genes result in a two-fold increase in grain number per panicle due to the restoration of the fertility of the pedicellate spikelets, which invariably abort in natural sorghum accessions. Here, we report the identification of another gene, MSD3, which is also involved in the regulation of grain numbers in sorghum. Four bulked F2 populations from crosses between BTx623 and each of the independent msd mutants p6, p14, p21, and p24 were sequenced to 20× coverage of the whole genome on a HiSeq 2000 system. Bioinformatic analyses of the sequence data showed that one gene, Sorbi_3001G407600, harbored homozygous mutations in all four populations. This gene encodes a plastidial ω-3 fatty acid desaturase that catalyzes the conversion of linoleic acid (18:2) to linolenic acid (18:3), a substrate for jasmonic acid (JA) biosynthesis. The msd3 mutants had reduced levels of linolenic acid in both leaves and developing panicles that in turn decreased the levels of JA. Furthermore, the msd3 panicle phenotype was reversed by treatment with methyl-JA (MeJA). Our characterization of MSD1, MSD2, and now MSD3 demonstrates that JA-regulated processes are critical to the msd phenotype. The identification of the MSD3 gene reveals a new target that could be manipulated to increase grain number per panicle in sorghum, and potentially other cereal crops, through the genomic editing of MSD3 functional orthologs.
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Affiliation(s)
- Lavanya Dampanaboina
- Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, U.S. Department of Agriculture-Agricultural Research Service, Lubbock, TX 79415, USA.
| | - Yinping Jiao
- Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, U.S. Department of Agriculture-Agricultural Research Service, Lubbock, TX 79415, USA.
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, NY 11724, USA.
| | - Junping Chen
- Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, U.S. Department of Agriculture-Agricultural Research Service, Lubbock, TX 79415, USA.
| | - Nicholas Gladman
- Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, U.S. Department of Agriculture-Agricultural Research Service, Lubbock, TX 79415, USA.
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, NY 11724, USA.
| | - Ratan Chopra
- Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, U.S. Department of Agriculture-Agricultural Research Service, Lubbock, TX 79415, USA.
- Current address: Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108, USA.
| | - Gloria Burow
- Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, U.S. Department of Agriculture-Agricultural Research Service, Lubbock, TX 79415, USA.
| | - Chad Hayes
- Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, U.S. Department of Agriculture-Agricultural Research Service, Lubbock, TX 79415, USA.
| | - Shawn A Christensen
- Chemistry Research Unit, USDA-ARS, 1700 S.W. 23rd Drive, Gainesville, FL 32608, USA.
| | - John Burke
- Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, U.S. Department of Agriculture-Agricultural Research Service, Lubbock, TX 79415, USA.
| | - Doreen Ware
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, NY 11724, USA.
- U.S. Department of Agriculture-Agricultural Research Service, NEA Robert W. Holley Center for Agriculture and Health, Cornell University, Ithaca, New York, NY 14853, USA.
| | - Zhanguo Xin
- Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, U.S. Department of Agriculture-Agricultural Research Service, Lubbock, TX 79415, USA.
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Yang G, Chen S, Chen L, Sun K, Huang C, Zhou D, Huang Y, Wang J, Liu Y, Wang H, Chen Z, Guo T. Development of a core SNP arrays based on the KASP method for molecular breeding of rice. RICE (NEW YORK, N.Y.) 2019; 12:21. [PMID: 30963280 PMCID: PMC6453994 DOI: 10.1186/s12284-019-0272-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 02/20/2019] [Indexed: 05/07/2023]
Abstract
BACKGROUND The development and utilization of genetic markers play a pivotal role in marker-assisted breeding of rice cultivars during pyramiding of valuable genes. Among molecular markers, SNPs have become the most promising due to their wide distribution within genomes and suitability for high -throughput automated genotyping. Although metadata of SNPs have been identified via next generation sequencing in rice, a large gap between the development of SNP markers and the application in breeding still exists. To promote the application of SNP markers based on the KASP (Kompetitive Allele-Specific PCR) method in rice breeding, a set of core SNP arrays was built via the screening of SNP databases and literature resources based on the KASP method. RESULTS Five hundred and ninety six SNPs classified into eight subsets including quality control, indica-indica variation, highly polymorphic, functional genes, key genes targeting sites, gene cloned region, important trait associated and gap filling sites were chosen to design KASP primers and 565 out of them were successfully designed, and the assay design success rate was 94.8%. Finally, 467 out of the 565 successfully-designed SNPs can display diversity at the loci were used to develop a set of core SNP arrays. To evaluate the application value of the core SNP markers in rice breeding, 481 rice germplasms were genotyped with three functional KASP markers designed from the sequences of GBSSI, SSIIa, and Badh2 from the core SNP arrays for estimation of their grain quality performance. Eighteen rice lines, including Xiangwanxian 13, Basmati 370, Ruanhua A, and PR 33319-9-1-1-5-3-5-4-1, harbor all three favorable alleles. The core KASP arrays were also used for rice germplasm assessment, genetic diversity and population evaluation. Four hundred and eighty-one rice germplasms were divided into 3 groups: POP1, POP2 and POP3. POP1 and POP2 were indica rice subgroups consisting of 263 and 186 rice germplasms, respectively. POP3 was a japonica rice subgroup consisting of 32 rice germplasms. The average FST value for the three subgroups was 0.3501; the FST value of POP1 and POP3 was the largest (0.5482), while that of POP1 and POP2 was the smallest (0.0721). The results showed that the genetic distance between the japonica and indica rice subspecies was large, indicating that the core SNP markers were effective at discriminating the population structure of the germplasms. Finally, the core KASP arrays were used for association analysis with milled grain traits. A total of 31 KASP markers were significantly associated (P < 0.01) with ML and the LWR. Among the 31 markers, 13 were developed based on cloned genes or on identified loci related to yield traits. Notably, several KASP markers associated with grain quality were also found to be associated with brown planthopper resistance or green leafhopper resistance simultaneously. CONCLUSIONS The core KASP arrays developed in our study were efficient and versatile for rice germplasm assessment, genetic diversity and population evaluation and are valuable for promoting SNP molecular breeding in rice. Our study demonstrated that useful assays combined with molecular breeding can be exploited for important economic trait improvement in rice breeding.
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Affiliation(s)
- Guili Yang
- National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou, 510642, China
| | - Siping Chen
- National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou, 510642, China
| | - Likai Chen
- National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou, 510642, China
| | - Kai Sun
- National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou, 510642, China
| | - Cuihong Huang
- National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou, 510642, China
| | - Danhua Zhou
- National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou, 510642, China
| | - Yuting Huang
- National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou, 510642, China
| | - Jiafeng Wang
- National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou, 510642, China
| | - Yongzhu Liu
- National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou, 510642, China
| | - Hui Wang
- National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou, 510642, China
| | - Zhiqiang Chen
- National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou, 510642, China.
| | - Tao Guo
- National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou, 510642, China.
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Burow G, Chopra R, Hughes H, Xin Z, Burke J. Marker Assisted Selection in Sorghum Using KASP Assay for the Detection of Single Nucleotide Polymorphism/Insertion Deletion. Methods Mol Biol 2019; 1931:75-84. [PMID: 30652284 DOI: 10.1007/978-1-4939-9039-9_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] [Indexed: 04/26/2023]
Abstract
Marker assisted selection (MAS), an advance tool in plant breeding that allows accurate and efficient introgression of important agronomic trait(s) from a germplasm source to desired elite lines, has been applied to sorghum recently. Here, we report the methods for the deployment of MAS for trait introgression using endpoint genotyping technology for single nucleotide polymorphism (SNP)/insertion deletion (InDel) coupled with an application of KASP (Kompetitive Allele Specific Polymerase Chain Reaction [PCR]) chemistry allowing for the selection of parents for generational advancement without going through the laborious and time consuming phenotypic selection and additional generations for selection of desired individuals. This MAS-SNP marker assisted backcrossing scheme can be applied to accurately select heterozygotes for use as an allele donor parent in each backcross generation, thus expediting the backcrossing scheme and resulting in time savings of 3 years compared to conventional methods of introgression practiced in sorghum breeding and improvement.
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Affiliation(s)
- Gloria Burow
- Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, USDA-ARS, Lubbock, TX, USA.
| | - Ratan Chopra
- Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, USDA-ARS, Lubbock, TX, USA
- Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN, USA
| | - Halee Hughes
- Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, USDA-ARS, Lubbock, TX, USA
| | - Zhanguo Xin
- Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, USDA-ARS, Lubbock, TX, USA
| | - John Burke
- Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, USDA-ARS, Lubbock, TX, USA
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Chopra R, Johnson EB, Daniels E, McGinn M, Dorn KM, Esfahanian M, Folstad N, Amundson K, Altendorf K, Betts K, Frels K, Anderson JA, Wyse DL, Sedbrook JC, David Marks M. Translational genomics using Arabidopsis as a model enables the characterization of pennycress genes through forward and reverse genetics. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2018; 96:1093-1105. [PMID: 30394623 DOI: 10.1111/tpj.14147] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 09/05/2018] [Accepted: 10/26/2018] [Indexed: 05/05/2023]
Abstract
Thlaspi arvense (pennycress) has the potential for domestication as a new oilseed crop. Information from an extensive body of research on the related plant species Arabidopsis can be used to greatly speed this process. Genome-scale comparisons in this paper documented that pennycress and Arabidopsis share similar gene duplication. This finding led to the hypothesis that it should be possible to isolate Arabidopsis-like mutants in pennycress. This proved to be true, as forward genetic screens identified floral and vegetative pennycress mutants that were similar to mutants found in Arabidopsis. Extending this approach, it was shown that most of the pennycress genes responsible for the formation of oxidized tannins could be rapidly identified. The causative mutations in the pennycress mutants could be identified either by PCR amplification of candidate genes or through whole-genome sequencing (WGS) analysis. In all, WGS was used to characterize 95 ethyl methane sulfonate mutants, which revealed a mutation rate of 4.09 mutations per megabase. A sufficient number of non-synonymous mutations were identified to create a mutant gene index that could be used for reverse genetic approaches to identify pennycress mutants of interest. As proof of concept, a Ta-max3-like dwarf mutant and Ta-kcs5/cer60-like wax mutants deficient in the biosynthesis of long chain fatty acids were identified. Overall, these studies demonstrate that translational genomics can be used to promote the domestication of pennycress. Furthermore, the ease with which important findings could be made in pennycress makes this species a new potential model plant.
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Affiliation(s)
- Ratan Chopra
- Department of Plant and Microbial Biology, University of Minnesota, St Paul, MN, 55108, USA
| | - Evan B Johnson
- Department of Plant and Microbial Biology, University of Minnesota, St Paul, MN, 55108, USA
| | - Erin Daniels
- Department of Plant and Microbial Biology, University of Minnesota, St Paul, MN, 55108, USA
| | - Michaela McGinn
- School of Biological Sciences, Illinois State University, Normal, IL, 61790, USA
| | - Kevin M Dorn
- Department of Plant and Microbial Biology, University of Minnesota, St Paul, MN, 55108, USA
| | - Maliheh Esfahanian
- School of Biological Sciences, Illinois State University, Normal, IL, 61790, USA
| | - Nicole Folstad
- Department of Plant and Microbial Biology, University of Minnesota, St Paul, MN, 55108, USA
| | - Kirk Amundson
- Department of Plant and Microbial Biology, University of Minnesota, St Paul, MN, 55108, USA
| | - Kayla Altendorf
- Department of Agronomy and Plant Genetics, University of Minnesota, St Paul, MN, 55108, USA
| | - Kevin Betts
- Department of Agronomy and Plant Genetics, University of Minnesota, St Paul, MN, 55108, USA
| | - Katherine Frels
- Department of Agronomy and Plant Genetics, University of Minnesota, St Paul, MN, 55108, USA
| | - James A Anderson
- Department of Agronomy and Plant Genetics, University of Minnesota, St Paul, MN, 55108, USA
| | - Donald L Wyse
- Department of Agronomy and Plant Genetics, University of Minnesota, St Paul, MN, 55108, USA
| | - John C Sedbrook
- School of Biological Sciences, Illinois State University, Normal, IL, 61790, USA
| | - M David Marks
- Department of Plant and Microbial Biology, University of Minnesota, St Paul, MN, 55108, USA
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