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Genome-wide association of drought-related and biomass traits with HapMap SNPs in Medicago truncatula.
Kang, Yun; Sakiroglu, Muhammet; Krom, Nicholas; Stanton-Geddes, John; Wang, Mingyi; Lee, Yi-Ching; Young, Nevin D; Udvardi, Michael.
Afiliação
  • Kang Y; Plant Biology Division, The Samuel Roberts Noble Foundation, Ardmore, OK, 73401, USA.
  • Sakiroglu M; Bioengineering Department, Kafkas University, Kars, 36100, Turkey.
  • Krom N; Plant Biology Division, The Samuel Roberts Noble Foundation, Ardmore, OK, 73401, USA.
  • Stanton-Geddes J; Department of Biology, University of Vermont, Burlington, VT, 05405, USA.
  • Wang M; Plant Biology Division, The Samuel Roberts Noble Foundation, Ardmore, OK, 73401, USA.
  • Lee YC; Plant Biology Division, The Samuel Roberts Noble Foundation, Ardmore, OK, 73401, USA.
  • Young ND; Department of Plant Biology, University of Minnesota, St. Paul, MN, 55108, USA.
  • Udvardi M; Plant Biology Division, The Samuel Roberts Noble Foundation, Ardmore, OK, 73401, USA.
Plant Cell Environ ; 38(10): 1997-2011, 2015 Oct.
Article em En | MEDLINE | ID: mdl-25707512
Improving drought tolerance of crop plants is a major goal of plant breeders. In this study, we characterized biomass and drought-related traits of 220 Medicago truncatula HapMap accessions. Characterized traits included shoot biomass, maximum leaf size, specific leaf weight, stomatal density, trichome density and shoot carbon-13 isotope discrimination (δ(13) C) of well-watered M. truncatula plants, and leaf performance in vitro under dehydration stress. Genome-wide association analyses were carried out using the general linear model (GLM), the standard mixed linear model (MLM) and compressed MLM (CMLM) in TASSEL, which revealed significant overestimation of P-values by CMLM. For each trait, candidate genes and chromosome regions containing SNP markers were found that are in significant association with the trait. For plant biomass, a 0.5 Mbp region on chromosome 2 harbouring a plasma membrane intrinsic protein, PIP2, was discovered that could potentially be targeted to increase dry matter yield. A protein disulfide isomerase-like protein was found to be tightly associated with both shoot biomass and leaf size. A glutamate-cysteine ligase and an aldehyde dehydrogenase family protein with Arabidopsis homologs strongly expressed in the guard cells were two of the top genes identified by stomata density genome-wide association studies analysis.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Polimorfismo de Nucleotídeo Único / Medicago truncatula / Estudos de Associação Genética Tipo de estudo: Risk_factors_studies Idioma: En Revista: Plant Cell Environ Assunto da revista: BOTANICA Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Polimorfismo de Nucleotídeo Único / Medicago truncatula / Estudos de Associação Genética Tipo de estudo: Risk_factors_studies Idioma: En Revista: Plant Cell Environ Assunto da revista: BOTANICA Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Estados Unidos