QTL Analysis of Cold Resistance and Ratooning Ability by Using indicajaponica RIL Populations in Rice

YANG Chuanhang1,2, WANG   Yuping1, TU Bin1, ZENGYuqing2, LI Shigui1,*

doi:10.3969/j.issn.10017216.2012.06.015

Chinese Journal OF Rice Science >

2012 , Vol. 26 >Issue 6: 741 - 745

DOI: https://doi.org/10.3969/j.issn.10017216.2012.06.015

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QTL Analysis of Cold Resistance and Ratooning Ability by Using indicajaponica RIL Populations in Rice

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¹ Rice Research Institute, Sichuan Agricultural University, Wenjiang 611130， China; ² Zigong Agricultural Research Institute, Zigong 643000， China;

Received date: 2011-11-08

Revised date: 2012-01-14

Online published: 2012-11-10

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Abstract

A molecular linkage map containing 105 SSR markers was constructed by using a RIL population which was derived from the F7 descent of a cross between japonica glutinous rice variety Nuo 891 and an indica variety Shuhui 527. The cold resistance of bud for both the parents and the RIL was investigated at 5℃ low temperature, and their survival and ratooning ability were evaluated under natural temperature conditions in winter. QTL analysis showed that the cold resistance of rice was controlled by QTLs and followed a continuous distribution in RIL population. Two QTL, qCtg3 and qCtg5， controlling cold resistance at bud stage were located on chromosome 3 and 5, explaining 7557% and 79.04% phenotypic variation, respectively. A major QTL, qCtr5， controlling the survival and ratooning ability in rice was mapped on chromosome 5. Two QTLs(qRa4, qRa5) conferning ratooning capacity were detected on chromosome 4 and 5, explaining 8.17% and 7.09% phenotypic variation, respectively. qCtg5， qCtr5 and qRa5 locus were simultaneously linked to RM153 on chromosome 5, which indicated the relationship of those traits.

Key words： rice; recombinant inbred lines; cold tolerance; ratooning ability; QTL

Cite this article

YANG Chuanhang1,2, WANG Yuping1, TU Bin1, ZENGYuqing2, LI Shigui1,* . QTL Analysis of Cold Resistance and Ratooning Ability by Using indicajaponica RIL Populations in Rice[J]. Chinese Journal OF Rice Science, 2012 , 26(6) : 741 -745 . DOI: 10.3969/j.issn.10017216.2012.06.015

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