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Genetic architecture of maize kernel composition in the nested association mapping and inbred association panels.
Cook, Jason P; McMullen, Michael D; Holland, James B; Tian, Feng; Bradbury, Peter; Ross-Ibarra, Jeffrey; Buckler, Edward S; Flint-Garcia, Sherry A.
Afiliação
  • Cook JP; Division of Plant Sciences, University of Missouri, Columbia, Missouri 65211, USA.
Plant Physiol ; 158(2): 824-34, 2012 Feb.
Article em En | MEDLINE | ID: mdl-22135431
The maize (Zea mays) kernel plays a critical role in feeding humans and livestock around the world and in a wide array of industrial applications. An understanding of the regulation of kernel starch, protein, and oil is needed in order to manipulate composition to meet future needs. We conducted joint-linkage quantitative trait locus mapping and genome-wide association studies (GWAS) for kernel starch, protein, and oil in the maize nested association mapping population, composed of 25 recombinant inbred line families derived from diverse inbred lines. Joint-linkage mapping revealed that the genetic architecture of kernel composition traits is controlled by 21-26 quantitative trait loci. Numerous GWAS associations were detected, including several oil and starch associations in acyl-CoA:diacylglycerol acyltransferase1-2, a gene that regulates oil composition and quantity. Results from nested association mapping were verified in a 282 inbred association panel using both GWAS and candidate gene association approaches. We identified many beneficial alleles that will be useful for improving kernel starch, protein, and oil content.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Genes de Plantas / Zea mays Tipo de estudo: Prognostic_studies / Risk_factors_studies Idioma: En Ano de publicação: 2012 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Genes de Plantas / Zea mays Tipo de estudo: Prognostic_studies / Risk_factors_studies Idioma: En Ano de publicação: 2012 Tipo de documento: Article