水稻抽穗期耐热QTL的定位研究Mapping QTLs for Rice Heat Tolerance at Heading Stage

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 水稻抽穗期耐热QTL的定位研究[EB/OL]

北京:中国科技论文在线

通过比较江苏扬州2013年大田极端高温和2014年常温条件下水稻耐热性的差异来定位水稻耐热性QTL (数量性状基因座位)

) 摘要: 为鉴定和定位水稻抽穗灌浆期对高温的耐受性

以水稻耐热指数[(常温结实率-高温结实率)/常温结实率]为评价指标

相关研究为后续耐热QTL的精细定位、克隆和高温钝感型优异品种的培育提供了依据

共检测到3个耐热性QTL

CSSLs; QTL; 耐热性 Zhang Changquan

陈飞

陈飞

) Abstract: In this paper, a japonica rice (Oryza sativa L

) variety Nipponbare, an indica variety 9311 and a set of chromosome segment substitution lines (CSSLs) which were generated using Nipponbare as the recipient parent and 9311 as the donor parent were used as the experimental materials

The CSSLs were grown in 2012 (normal temperature condition) and 2013 (high temperature condition) in Yangzhou, Jiangsu, and were used to map the quantitative trait loci (QTLs) for heat tolerance, based on the heat tolerance index [(The seed setting rate under normal temperature condition - The seed setting rate under high temperature condition) / The seed setting rate under normal temperature condition]

As a result, three QTLs for heat tolerance in rice were mapped on chromosomes 2, 4 and 12, respectively

They had LOD (logarithm of odds) scores of 2

56, 4

02 and 2

79, and contribution rates of 4

95%, 7

99% and 5

44%

Among them, qHT12

1 showed positive effect, while qHT2

1 and qHT4

1 showed negative effect on heat tolerance

The results lay a foundation for the fine mapping and cloning of the QTLs and genes related to heat tolerance, and for the breeding of heat-tolerant rice varieties

Keywords: Rice (Oryza Sativa ); CSSLs; QTL; Heat tolerance 下载PDF阅读器 PDF全文下载: 初稿 ( 0 ) 作者简介: Zhang Changquan (1981-), Male, Master, Main in rice grain quality improvement 通信联系人: Liu Qiaoquan (1973-), Male, Professor, Main in rice grain quality improvement 【收录情况】 中国科技论文在线: 张昌泉

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