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Loci discovery, network-guided approach, and genomic prediction for drought tolerance index in a multi-parent advanced generation intercross (MAGIC) cowpea population

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Horticulture Research 2021年第1期8卷 292-304页

作者： Waltram Ravelombola Ainong Shi Bao-Lam Huynh Department of Horticulture University of ArkansasFayettevilleAR 72701USA Texas A&M AgriLife Research&Extension VernonTX 76384USA Department of Nematology University of CaliforniaRiversideCA 92521USA

Cowpea is a nutrient-dense legume that significantly contributes to the population’s diet in sub-Saharan Africa and other regions of the *** cowpea cultivars to be more resilient to abiotic stress such as drought would be of great *** use of a multi-parent advanced generation intercross(MAGIC)population has been shown to be efficient in increasing the frequency of rare alleles that could be associated with important agricultural *** addition,drought tolerance index has been reported to be a reliable parameter for assessing crop tolerance to water-deficit ***,the objectives of this study were to evaluate the drought tolerance index for plant growth habit,plant maturity,flowering time,100-seed weight,and grain yield in a MAGIC cowpea population,to conduct genome-wide association study(GWAS)and identify single nucleotide polymorphism(SNP)markers associated with the drought tolerance indices,to investigate the potential relationship existing between the significant loci associated with the drought tolerance indices,and to conduct genomic selection(GS).These analyses were performed using the existing phenotypic and genotypic data published for the MAGIC population which consisted of 305 F8 recombinant inbred lines(RILs)developed at University of California,*** results indicated that:(1)large variation in drought tolerance indices existed among the cowpea genotypes,(2)a total of 14,18,5,5,and 35 SNPs were associated with plant growth habit change due to drought stress,and drought tolerance indices for maturity,flowering time,100-seed weight,and grain yield,respectively,(3)the network-guided approach revealed clear interactions between the loci associated with the drought tolerance traits,and(4)the GS accuracy varied from low to *** results could be applied to improve drought tolerance in cowpea through marker-assisted selection(MAS)and genomic selection(GS).To the best of our knowledge,this is the first re

关键词： drought cultivar MAGIC

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Homopteran Vector Biomarkers for Efficient Circulative Plant Virus Transmission are Conserved in Multiple Aphid Species and the Whitefly Bemisia tabaci

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Journal of Integrative Agriculture 2012年第2期11卷 249-262页

作者： Michelle Cilia Michael Bereman Tara Fish Michael J MacCoss stewart Gray USDA-ARS Robert W. Holley Center for Agriculture and Health Tower Road Ithaca New York 14853 USA Department of Plant Pathology and Plant-Microbe Biology Cornell University Ithaca New York 14853 USA Department of Genome Sciences University of Washington Seattle Washington 98195-5065 USA

Plant viruses in the families Luteoviridae and Geminiviridae are phloem restricted and are transmitted in a persistent,circulative manner by homopteran *** fluorescence 2-D difference gel electrophoresis to compare the proteomes of F2 genotypes of Schizaphis graminum segregating for virus transmission ability,we recently discovered a panel of protein biomarkers that predict vector *** we used aphid and whitefly nucleotide and expressed sequence tag database mining to test whether these biomarkers are conserved in other homopteran *** gene homologs that shared a high degree of predicted amino acid identity were discovered in two other aphid species and in the whitefly Bemisia *** reaction monitoring mass spectrometry was used to validate the expression of these biomarkers proteins in multiple aphid vector *** conservation of these proteins in multiple insect taxa that transmit plant viruses along the circulative transmission pathway creates the opportunity to use these biomarkers to rapidly identify insect populations that are the most efficient vectors and allow them to be targeted for control prior to the spread of virus within a crop.

关键词： aphid whitefly Schizaphis graminum Bemisia tabaci Acyrthosiphon pisum Toxoptera citricida Myzuspersicae proteomics biomarker circulative transmission begomovirus luteovirus geminivirus leaflaopper,selected reaction monitoring SRM mass spectrometry targeted proteomics Skyline

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