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ISSN: 2329-9029

Journal of Plant Biochemistry & Physiology
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Research Article

Scanning QTLs for Grain Shape Using a Whole Genome SNP Array in Rice

Wei Hu, Mi Wen, Zhongmin Han, Cong Tan and Yongzhong Xing*
1 National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research, Huazhong Agricultural University, Wuhan, 430070 China
 
Corresponding Author : Yongzhong Xing
National Key Laboratory of Crop Genetic Improvement
National Center of Plant Gene Research
Huazhong Agricultural University, Wuhan, 430070 China
E-mail: [email protected]
Received January 26, 2013; Accepted March 25, 2013; Published March 31, 2013
Citation: Hu W, Wen M, Han Z, Tan C, Xing Y (2013) Scanning QTLs for Grain Shape Using a Whole Genome SNP Array in Rice. J Plant Biochem Physiol 1:104. doi: 10.4172/2329-9029.1000104
Copyright: © 2013 Hu W, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

Grain shape is an important appearance quality trait that is associated with grain weight in rice. Dissection of the
genetic basis of grain shape will benefit the improvement of grain shape. In this study, we constructed a high-density
genetic linkage map via genotyping a recombinant inbred line population by a single nucleotide polymorphism (SNP)
array. A total of 22 quantitative trait loci (QTLs) were detected, one half was detected in both years of the experiment,
and the other half only in one year. As well as the QTLs reported in previous studies, five novel QTLs were identified,
which could be targets for marker-aided selection for grain shape improvement. Six pleiotropic QTLs were identified
and well explained the correlations among traits. Complementary action of additive QTLs adequately accounted for
the genetic basis of transgressive segregation. One to six heterogeneous inbred families for all detected QTLs were
searched in the recombinant inbred population, which provided a good chance to quickly produce near isogenic
lines. These new QTLs could be quickly validated and fine mapped on the basis of these HIFs.

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