Association Analysis of Grain-setting Rates in Apical and Basal Spikelets in Bread Wheat (Triticum aestivum L.)

文献类型： 外文期刊

第一作者： Guo, Jie

作者： Guo, Jie;Zhang, Yong;Zhang, Boqiao;Cheng, Xiaoming;Cheng, Kai;Cheng, Shunhe;Zhang, Xueyong;Hao, Chenyang;Guo, Jie;Shi, Weiping;Zhang, Jingjuan;Xu, Yanhao

作者机构：

关键词： bread wheat;released cultivars;grain numbers in apical spikelets;grain numbers in basal spikelets;association analysis

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2015 年 6 卷

页码：

收录情况： SCI

摘要： The rates of grain setting in apical and basal spikelets in wheat directly affect the kernel number per spike (KNPS). In this study, 220 wheat lines from 18 Chinese provinces and five foreign countries were used as a natural population. Phenotypic analysis showed differences in grain-setting rates between apical and basal spikelets. The broad-sense heritability of grain setting rate in apical spikelets (18.7-21.0%) was higher than that for basal spikelets (9.4-16.4%). Significant correlations were found between KNPS and grain numbers in apical (R-2 = 0.40-0.45, P < 0.01) and basal (R-2= 0.41-0.56, P < 0.01) spikelets. Seventy two of 106 SSR markers were associated with grain setting, 32 for apical spikelets, and 34 for basal spikelets. The SSR loci were located on 17 chromosomes, except 3A, 3D, 4A, and 7D, and explained 3.7-22.9% of the phenotypic variance. Four markers, Xcfa2153-1A(202), Xgwrn186-5A(118), Xgwm156-3B(319), and Xgwm537-7B(210), showed the largest effects on grain numbers in apical and basal spikelets. High grain numbers in apical and basal spikelets were associated with elite alleles. Ningmai 9, Ning 0569, and Yangmai 18 with high grain-setting rates carried larger numbers of favorable alleles. Comparison of grain numbers in basal and apical spikelets of 35 Yangmai and Ningmai lines indicated that the Ningmai lines had better grain setting rates (mean 21.4) than the Yangmai lines (16.5).

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