太湖流域部分粳稻品种核心种质库的构建

通过对204份太湖流域粳稻资源的10个性状和条纹叶枯病抗性的调查,构建了核心种质库。核心库各性状的变异系数均大于原群体的变异系数;除了株高和发病率外,其余性状的方差显著大于原群体的方差;核心库各性状的极差和均值与原群体相比,基本保持不变,极差符合率为95.4%,均值差异百分率为0%。因此,可以认为本研究所采用的构建资源核心库的方法,能以较小的样本容量保持原群体的遗传多样性。

Construction of Core Collection of Some Japanica Rice Germplasms in Taihu Region

The core collection of japanica rice germplasms was constructed from 204 japanica rice varieties in Taihu region according to 10 traits and resistance to rice stripe.CV of traits of core collection was higher than that of initial accessions.Traits variance of core collection was higher than that of initial accessions except for plant height and incidence of disease.The largest variation ranges and mean value of traits of core collection were almost the same as those of initial accessions,the coincidence rate for range was 95.4% and mean difference percentage was 0%.The results showed that the core collection could maintain the genetic diversity of initial resources.