QTL mapping for Q-enzyme activity during grain development in rice

文献类型： 外文期刊

第一作者： Yang, Zhan-Lie

作者： Yang, Zhan-Lie;Zhang, Hong-Wei;Gao, Zhi-Qiang;Zhan, Xiao-Deng;Cao, Li-Yong

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关键词： Q-enzyme; grain filling; quantitative trait locus; recombinant inbred line; rice

期刊名称：INDIAN JOURNAL OF GENETICS AND PLANT BREEDING （ 影响因子：0.508； 五年影响因子：0.523 ）

ISSN： 0019-5200

年卷期： 2018 年 78 卷 2 期

页码：

收录情况： SCI

摘要： Q-enzyme is important for the synthesis of rice grain starch and vital for grain filling. In this study, QTL (Quantitative trait locus) analysis for Q-enzyme activity during grain filling was carried out using recombinant inbred line population derived from the super rice Xieyou 9308. The activity of Q-enzyme was greatest at 15 days after heading. In addition, the Q-enzyme activity in early stage (Q10 and Q15) showed significant correlation with the grain filling rate of each stage as well as the average grain filling rate. Nine main-effect QTLs for grain Q-enzyme activity were identified through QTL analysis, they were distributed on chromosome 2, 3, 5, 6 and 7, and the proportion of phenotypic variation explained (R-2) by individual QTLs ranged from 5.68% to 11.59%. Among them, qQ10-3 and qQ15-3-2 are located in the same region of RM282-RM6283 on chromosome 3. qQ10-7-1 was detected in two years with an average R-2 of 8.86%, and significant epistasis effect with environment was also identified. These results enhance our understanding of the genetic bases of Q-enzyme activity in rice grain.

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