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Received: 2010-06-23

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Crosschecked: 2010-11-02

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Journal of Zhejiang University SCIENCE B 2010 Vol.11 No.12 P.958-964


Quantitative trait loci analysis for rice seed vigor during the germination stage

Author(s):  Zhou-fei Wang, Jian-fei Wang, Yong-mei Bao, Fu-hua Wang, Hong-sheng Zhang

Affiliation(s):  State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China, Institute of Crop Science, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China

Corresponding email(s):   wangjf@njau.edu.cn, hszhang@njau.edu.cn

Key Words:  Rice, Recombinant inbred line (RIL) population, Seed vigor, Quantitative trait locus (QTL), Germination

Zhou-fei Wang, Jian-fei Wang, Yong-mei Bao, Fu-hua Wang, Hong-sheng Zhang. Quantitative trait loci analysis for rice seed vigor during the germination stage[J]. Journal of Zhejiang University Science B, 2010, 11(12): 958-964.

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author="Zhou-fei Wang, Jian-fei Wang, Yong-mei Bao, Fu-hua Wang, Hong-sheng Zhang",
journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

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%T Quantitative trait loci analysis for rice seed vigor during the germination stage
%A Zhou-fei Wang
%A Jian-fei Wang
%A Yong-mei Bao
%A Fu-hua Wang
%A Hong-sheng Zhang
%J Journal of Zhejiang University SCIENCE B
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%D 2010
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1000238

T1 - Quantitative trait loci analysis for rice seed vigor during the germination stage
A1 - Zhou-fei Wang
A1 - Jian-fei Wang
A1 - Yong-mei Bao
A1 - Fu-hua Wang
A1 - Hong-sheng Zhang
J0 - Journal of Zhejiang University Science B
VL - 11
IS - 12
SP - 958
EP - 964
%@ 1673-1581
Y1 - 2010
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.B1000238

seed vigor is an important characteristic of seed quality, and rice cultivars with strong seed vigor are desirable in direct-sowing rice production for optimum stand establishment. In the present study, the quantitative trait loci (QTLs) of three traits for rice seed vigor during the germination stage, including germination rate, final germination percentage, and germination index, were investigated using one recombinant inbred line (RIL) population derived from a cross between japonica Daguandao and indica IR28, and using the multiple interval mapping (MIM) approach. The results show that indica rice presented stronger seed vigor during the germination stage than japonica rice. A total of ten QTLs, and at least five novel alleles, were detected to control rice seed vigor, and the amount of variation (R2) explained by an individual QTL ranged from 7.5% to 68.5%, with three major QTLs with R2>20%. Most of the QTLs detected here are likely to coincide with QTLs for seed weight, seed size, or seed dormancy, suggesting that the rice seed vigor might be correlated with seed weight, seed size, and seed dormancy. At least five QTLs are novel alleles with no previous reports of seed vigor genes in rice, and those major or minor QTLs could be used to significantly improve the seed vigor by marker-assisted selection (MAS) in rice.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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