Genetic Analysis for the Diversity of Heading Date of Cultivated Rice in China
Genetic Analysis for the Diversity of Heading Date of Cultivated Rice in China
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发表时间：
2012
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通讯作者：
W. Xiang
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作者：
W. Xiang
抽穗期决定了栽培稻的区域适应性，我国栽培稻的抽穗期具有丰富的多样性，本研究对我国不同地区的83个典型粳稻品种和51个典型籼稻品种的抽穗期进行了调查，分析了它们的基本营养生长情况，光敏性（PS）和温敏性（TS）回归分析表明，HD与PS和BVG密切相关，我国高纬度地区品种的PS和BVG较弱，对134个小麦品种进行了遗传分析，结果表明：总体上，当小麦品种不携带PS等位基因e1时，植株抽穗早，PS和BVG较弱;当小麦品种携带PS等位基因E1或E1 t时，植株抽穗晚，PS和BVG较强;当小麦品种携带Ef-1等位基因时，植株抽穗早，PS和BVG较弱;当小麦品种携带Ef-1等位基因时，植株抽穗晚，PS和BVG较强。当品种携带Ef-1 t或ef-1等位基因时，抽穗晚，BVG强，表明E1和Ef-1是决定我国栽培稻抽穗期变异的两个主要因素，否则，分析了主穗期基因不同等位基因在我国不同地区的分布，结果表明，我国不同地区猪HD主效基因的主导等位基因存在差异。
Heading date(HD) determines the adaptability to growing regions of cultivated rice.There is a rich diversity of HDs in Chinese cultivated rice.In this study,HDs of 83 typical japonica rice and 51 typical indica rice cultivars native to different re-gions in China were investigated and their basic vegetative growth(BVG),photoperiod-sensitivities(PS) and tempera-ture-sensitivities(TS) were analyzed.A regression analysis showed that HD was closely correlated with PS and BVG.The PS and BVG of cultivars were weak in high latitude regions of China,and strong in low latitude regions.Genetic analyses of the 134 cultivars were conducted using a set of HD tester lines.The results showed that,on the whole,when the cultivars carried no-PS allele e1,the plants headed earlier with weaker PS and BVG,when the cultivars carried the PS allele E1 or E1t,the plants headed later with strong PS and BVG.When the cultivars carried the allele Ef-1,the plants headed earlier with weaker BVG,when the cultivars carried the allele Ef-1t or ef-1,the plants headed later with strong BVG.It suggested that E1 and Ef-1 are two major de-terminants of variation in heading date of cultivated rice in China.Otherwise,the distribution of different alleles of the major heading date genes in different regions of China was analysed,and the results showed that the leading alleles of the major HD genes in different regions of China was different.