Genetic analysis for rice seedling vigor and fine mapping of a major QTL qSSL1b for seedling shoot length

文献类型： 外文期刊

第一作者： Zhang, Anpeng

作者： Zhang, Anpeng;Liu, Chaolei;Chen, Guang;Hong, Kai;Gao, Yang;Tian, Peng;Peng, Youlin;Zhang, Bin;Ruan, Banpu;Jiang, Hongzhen;Guo, Longbiao;Qian, Qian;Gao, Zhenyu

作者机构：

关键词： rice;QTL;seedling vigor;qSSL1b;early seedling stage

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

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收录情况： SCI

摘要： Seedling vigor is an important agricultural trait as direct-seeded rice technology becomes widely applied. In order to investigate the genetic mechanisms underlying seedling vigor in rice, seeds of 132 recombinant inbred lines (RILs) derived from 93-11 and PA64s, harvested from Lingshui and Hangzhou were cultivated in the nutrient solution, and four indices for seedling vigor were measured including seedling shoot length (SSL), seedling root length (SRL), seedling wet weight (SWW) and seedling dry weight (SDW). Significant correlations were observed among the indices, and also between 1000-seed weight (TSW) and SWW or SDW. Combined with a high-resolution genetic map generated from sequencing of the RILs, 65 quantitative trait loci (QTLs) were detected on all chromosomes with interval of 1.93 Mb on average. Among 57 QTLs for seedling vigor, 28 were detected from seeds harvested in both sites and 33 were first identified. With BC3F2 derived from 93-11 and a CSSL harboring segments from PA64s in 93-11 background, a major QTL for SSL, qSSL1b was fine mapped within 80.5 kb between two InDel markers. Our study provides a platform for further cloning of the QTL and dissecting the molecular basis for seedling vigor at early seedling stage in rice.

分类号： S33

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