Identification and pyramiding of QTLs for cold tolerance at the bud bursting and the seedling stages by use of single segment substitution lines in rice (Oryza sativa L.)
文献类型: 外文期刊
第一作者: Yang, Tifeng
作者: Yang, Tifeng;Zhang, Shaohong;Zhao, Junliang;Liu, Qing;Huang, Zhanghui;Mao, Xingxue;Dong, Jingfang;Wang, Xiaofei;Liu, Bin;Yang, Tifeng;Zhang, Guiquan;Yang, Tifeng;Zhang, Shaohong;Zhao, Junliang;Liu, Qing;Huang, Zhanghui;Mao, Xingxue;Dong, Jingfang;Wang, Xiaofei;Liu, Bin
作者机构:
关键词: Rice;Single segment substitution line;Cold tolerance;QTL mapping;QTL pyramiding
期刊名称:MOLECULAR BREEDING ( 影响因子:2.589; 五年影响因子:2.75 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: Cold stress is one of the main constraints in rice production, and damage from cold can occur at different developmental stages in rice. Understanding the genetic basis of cold tolerance is the key for breeding cold-tolerant variety. In this study, we used single segment substitution lines (SSSLs) derived from a cross between cold-tolerant japonica variety "Nan-yang-zhan" and a popular indica variety "Hua-jing-xian 74" to detect and pyramid QTLs for cold tolerance at the bud bursting and the seedling stages. Evaluation of cold tolerance of these SSSLs and their recurrent parent helped identify two cold-tolerant QTLs (qCTBB-5 and qCTBB-6) at the bud bursting stage and two cold-tolerant QTLs (qCTS-6 and qCTS-12) at the seedling stage. The SSSLs carrying these QTLs showed stronger cold tolerance than their recurrent parent HJX74 did in three independent experiments. The qCTBB-6 and qCTS-6 were mapped to the same chromosomal region. QTL pyramiding was performed by intercrossing of SSSLs carrying the respective QTLs for cold tolerance at the bud bursting stage and the seedling stage and marker-assisted selection (MAS). The selected pyramiding line SC-11 with different cold-tolerant QTLs showed cumulative effects on cold tolerance. Our results suggest that different genes (QTLs) control cold tolerance at bud bursting and seedling stages, and pyramiding of stable expression QTLs for cold tolerance at different developmental stages through MAS is a good strategy to prevent cold damage in rice.
分类号: Q94
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