Characterization and identification of cold tolerant near-isogenic lines in rice

文献类型： 外文期刊

第一作者： Zhou, Lei

作者： Zhou, Lei;Hu, Guanglong;Pan, Yinghua;Zhang, Hongliang;Li, Jinjie;Li, Zichao;Zhou, Lei;Hu, Guanglong;Pan, Yinghua;Zhang, Hongliang;Li, Jinjie;Li, Zichao;Zeng, Yawen;Yang, Shuming;Zhou, Lei;You, Aiqing;Hu, Guanglong

作者机构：

关键词： Oryza sativa;cold tolerance;booting stage;near-isogenic lines

期刊名称：BREEDING SCIENCE （ 影响因子：2.086； 五年影响因子：2.632 ）

ISSN： 1344-7610

年卷期： 2012 年 62 卷 2 期

页码：

收录情况： SCI

摘要： To exploit the genetic mechanism of cold tolerance in rice, cold tolerant near-isogenic lines (NILs) were developed by backcrossing Kunmingxiaobaigu (KMXBG), reported to be the most cold-tolerant variety at the booting stage, as donor, with the cold sensitive Japanese commercial japonica variety, Towada. Comparisons of cold tolerance-related traits between five BC6F5 NILs and recurrent parent Towada under cold treatment and normal temperatures at the booting stage showed that the differences between the NILs and Towada were significant only for spikelet fertility-related traits. Analyses of cold tolerance in the NILs at the budding (germination), seedling and booting stages indicated both correlated effects and differences. Lines 1913-4 and 1916-1 showed strong and stable tolerance at all three stages. Whole genome marker screening showed that the proportion of genetic background recovery was more than 98%. Seventeen markers from KMXBG were introgressed in two or more NILs, and cold tolerance genes were possibly present in these marker regions. The NILs should be excellent materials for both rice improvement and map-based cloning of cold tolerance QTLs.

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