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

被引：37

作者：

Zhang, Anpeng ^{[1
]}

Liu, Chaolei ^{[1
]}

Chen, Guang ^{[1
]}

Hong, Kai ^{[1
]}

Gao, Yang ^{[1
]}

Tian, Peng ^{[1
]}

Peng, Youlin ^{[1
]}

Zhang, Bin ^{[1
]}

Ruan, Banpu ^{[1
]}

Jiang, Hongzhen ^{[1
]}

Guo, Longbiao ^{[1
]}

Qian, Qian ^{[1
]}

Gao, Zhenyu ^{[1
]}

机构：

[1] China Natl Rice Res Inst, State Key Lab Rice Biol, Hangzhou 310006, Zhejiang, Peoples R China

来源：

BREEDING SCIENCE | 2017年 / 67卷 / 03期

基金：

中国国家自然科学基金;

关键词：

rice; QTL; seedling vigor; qSSL1b; early seedling stage; QUANTITATIVE TRAIT LOCI; LOW-TEMPERATURE GERMINABILITY; IDENTIFICATION; YIELD; GERMINATION; ESTABLISHMENT; DISSECTION; DIVERSITY; QLTG3-1;

D O I：

10.1270/jsbbs.16195

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

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.

引用

页码：307 / 315

页数：9

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