Genetic Architecture of Maize Kernel Composition in the Nested Association Mapping and Inbred Association Panels  | Zendy

Jason P. Cook | Zendy; Michael D. McMullen | Zendy; James B. Holland | Zendy; Feng Tian | Zendy; Peter J. Bradbury | Zendy; Jeffrey RossIbarra | Zendy; Edward S. Buckler | Zendy; Sherry FlintGarcia | Zendy

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Genetic Architecture of Maize Kernel Composition in the Nested Association Mapping and Inbred Association Panels

Author(s) -

Jason P. Cook,

Michael D. McMullen,

James B. Holland,

Feng Tian,

Peter J. Bradbury,

Jeffrey RossIbarra,

Edward S. Buckler,

Sherry FlintGarcia

Publication year - 2011

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.111.185033

Subject(s) - association (psychology) , genetic architecture , association mapping , kernel (algebra) , genetic association , biology , inbred strain , composition (language) , genetics , quantitative trait locus , mathematics , genotype , gene , psychology , single nucleotide polymorphism , pure mathematics , linguistics , philosophy , psychotherapist

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.

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