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首页> 外文期刊>Genetic Resources and Crop Evolution >Variation in flowering time in sorghum core collection and mapping of QTLs controlling flowering time by association analysis
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Variation in flowering time in sorghum core collection and mapping of QTLs controlling flowering time by association analysis

机译：高粱核心区开花时间的变化和通过关联分析控制开花时间的QTL定位

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A wide range of variation in flowering time was observed within a diversity research set of 107 sorghum accessions ranging from 56 to 133 days. Accessions were classified into early medium and late flowering groups. 45 accessions were grown under three different environments of photoperiod (11, 12 and 15 h). Sorghum accessions gradually responded to the decreasing of day-length. The 12 h of photoperiod could be considered as a threshold above which day-length delays the flowering time in sorghum. Association analysis was performed to identify the QTLs controlling flowering time and photoperiod sensitivity using 107 accessions of sorghum grown under natural condition and 45 accessions grown under controlled conditions. Four QTLs controlling flowering time were detected under natural condition of day-length at threshold 2.5 using K model. A total of seven flowering time loci were detected under controlled conditions of day-length. One QTL controlling photoperiod sensitivity was detected on chromosome 1 and one QTL controlling photoperiod insensitivity was detected on chromosome 4.
机译：在107份高粱品种的多样性研究中，观察到开花时间的变化范围很大，范围从56天到133天不等。将种分为早期中开花组和晚期开花组。在三种不同的光周期环境下（11、12和15 h）生长了45个种质。高粱的添加逐渐响应了日长的减少。光周期的12小时可以认为是一个阈值，高于该阈值时，一天的时间会延迟高粱的开花时间。使用在自然条件下生长的107份高粱和在受控条件下生长的45份高粱进行关联分析，以鉴定控制开花时间和光周期敏感性的QTL。使用K模型，在日长自然条件下于阈值2.5处检测到四个控制开花时间的QTL。在一天的受控条件下，总共检测到七个开花时间基因座。在1号染色体上检测到1个控制光周期敏感性的QTL，在4号染色体上检测到1个控制光周期敏感性的QTL。

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