Unconditional and conditional QTL mapping for the developmental behavior of tiller number in rice (Oryza sativa L.)

文献类型: 外文期刊

第一作者: Liu, Guifu

作者: Liu, Guifu;Zhu, Haitao;Zeng, Ruizhen;Zhang, Zemin;Li, Wentao;Ding, Xiaohua;Zhao, Fangming;Zhang, Guiquan;Liu, Shuwen

作者机构:

关键词: Unconditional QTL mapping;Conditional QTL mapping;Developmental behavior;Tiller number;Rice (Oryza sativa L.)

期刊名称:GENETICA ( 影响因子:1.082; 五年影响因子:1.489 )

ISSN: 0016-6707

年卷期: 2010 年 138 卷 8 期

页码:

收录情况: SCI

摘要: A single segment substitution population of 26 lines and their recipient parent Hua-jing-xian 74 (HJX74) were selected as experimental materials for analyzing the developmental behavior of tiller number in rice. By the unconditional QTL (quantitative trait locus) mapping method, a total number of 14 SSSLs were detected with QTLs controlling rice tiller number. The number of QTLs significantly affecting tiller number and their effect values estimated differed across measuring stages. More QTLs could be detected based on time-dependent measures of different stages. By the conditional QTL mapping method, it is possible to reveal net expression of gene in a time interval. 14 QTLs on tiller number expressed their effects in dynamic patterns of themselves during whole ontogeny. They exhibited mainly negative effects within 7 days after transplanting. During 7-21 days, QTLs were in active status and expressed larger positive effects. In the mid-period of 21-35 days, they had opposite genetic effects to wither tillers. Since then these QTLs expressed positive effects again to cause the appearance of noneffective tillers. The dynamics of QTL effects was in agreement with the actual change of tillers. Mapping QTL combining unconditional with conditional analysis for time-dependent measures is helpful to understand roundly the genetic bases for the development of quantitative traits.

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