Mapping quantitative trait loci for heat tolerance at the booting stage using chromosomal segment substitution lines in rice
文献类型: 外文期刊
第一作者: Zhu, Shan
作者: Zhu, Shan;He, Haohua;Zhu, Shan;Huang, Renliang;Wai, Hnin Pwint;Xiong, Hongliang;Shen, Xianhua;Yan, Song;Wai, Hnin Pwint
作者机构:
关键词: Rice (Oryza sativa L.);Heat tolerance;Booting stage;CSSL;QTL;qHTB3-3
期刊名称:PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS ( 影响因子:2.391; 五年影响因子:2.836 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: High temperature stress is a major obstacle in rice productivity. Considerable progress has been made on studying heat tolerance (HT) at different stages. However, the genetic basis of HT at the booting stage is poorly understood. In this study, we analyzed the morphological features of a heat-sensitive japonica cultivar Sasanishiki under natural high temperature stress at the booting stage. The anthers became smaller and the number, and fertility, of pollen grains were decreased significantly. As a result, there was a dramatic reduction in spikelet fertility. In contrast, the indica cultivar Habataki showed high HT and normal spikelet fertility under high temperature stress. Additonally, a set of chromosome segment substitution lines, derived from Sasanishiki and Habataki, were evaluated for HT related quantitative trait loci (QTLs) across two environments in the natural field. A total of 12 QTLs associated with HT were detected, of which, 5 were identified in two environments, and 7 in one environment. Furthermore, one of the major-effect QTLs (qHTB3-3) detected on the long arm of chromosome 3, was confirmed using overlapping substituted lines. qHTB3-3 was finally mapped between the two markers RM3525 and 3-M95, approximately 2.8 Mb apart. These findings and further gene cloning of qHTB3-3 will help us better understand the molecular control of HT in rice, and may contribute to the development of high HT rice varieties.
分类号: Q94`Q
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