华南地方稻种资源初级核心种质构建

Establishment of Primary Core Collection of Rice Landraces in South China

根据核心种质理论,以表型调查数据为基础,按照丁颖水稻分类体系与系统聚类取样相结合的方法,并通过多重比较确定了适宜的取样规模,最终从4020份华南地方稻种中筛选出436份材料构建了初级核心种质,中选比例10.8%。利用表型保留比例、多样性指数、表型频率方差和变异系数等重要参数对初级核心样品代表性进行检验。结果表明,所选初级核心样品很好地代表了原种质的遗传多样性和变异幅度。

According to the theory of core collection, 436 rice landraces were selected in South China to establish the primary core collection （10.8% of 4020 materials） based on the investigation data of phenotypic, combining rice classification system （originated by DingYing） with system cluster sampling and multiple comparison. The main parameters, such as ratio of phenotype retained, variance of phenotypic frequency, Shanno-Wavear index, and coefficient of variation, were used to examine representativeness of the core collection. The result showed that the core collection got good representation at genetic diversity and variation range of total resources.