NDLI: Genome-wide association analysis for nine agronomic traits in maize under well-watered and water-stressed conditions

Content Provider	Springer Nature Link
Author	Xue, Yadong Warburton, Marilyn L. Sawkins, Mark Zhang, Xuehai Setter, Tim Xu, Yunbi Grudloyma, Pichet Gethi, James Ribaut, Jean Marcel Li, Wanchen Zhang, Xiaobo Zheng, Yonglian Yan, Jianbing
Copyright Year	2013
Abstract	Drought can cause severe reduction in maize production, and strongly threatens crop yields. To dissect this complex trait and identify superior alleles, 350 tropical and subtropical maize inbred lines were genotyped using a 1536-SNP array developed from drought-related genes and an array of 56,110 random SNPs. The inbred lines were crossed with a common tester, CML312, and the testcrosses were phenotyped for nine traits under well-watered and water-stressed conditions in seven environments. Using genome-wide association mapping with correction for population structure, 42 associated SNPs (P ≤ 2.25 × 10−6 0.1/N) were identified, located in 33 genes for 126 trait × environment × treatment combinations. Of these genes, three were co-localized to drought-related QTL regions. Gene GRMZM2G125777 was strongly associated with ear relative position, hundred kernel weight and timing of male and female flowering, and encodes NAC domain-containing protein 2, a transcription factor expressed in different tissues. These results provide some good information for understanding the genetic basis for drought tolerance and further studies on identified candidate genes should illuminate mechanisms of drought tolerance and provide tools for designing drought-tolerant maize cultivars tailored to different environmental scenarios.
Starting Page	2587
Ending Page	2596
Page Count	10
File Format	PDF
ISSN	00405752
Journal	Theoretical and Applied Genetics
Volume Number	126
Issue Number	10
e-ISSN	14322242
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-07-25
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Plant Breeding/Biotechnology Plant Genetics & Genomics Agriculture Plant Biochemistry Biochemistry Biotechnology
Content Type	Text
Resource Type	Article
Subject	Genetics Medicine Biotechnology Agronomy and Crop Science

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