Journal
PLANT PHYSIOLOGY
Volume 158, Issue 2, Pages 824-834Publisher
OXFORD UNIV PRESS INC
DOI: 10.1104/pp.111.185033
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Funding
- National Science Foundation [DBI-0321467, IOS-0820619]
- U.S. Department of Agriculture National Institute of Food and Agriculture [2009-01864]
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [0820619] Funding Source: National Science Foundation
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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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