Sampling a Core Collection of Island Cotton (Gossypium barbadense L.) Based on the Genotypic Values of Fiber Traits
Sampling a Core Collection of Island Cotton (Gossypium barbadense L.) Based on the Genotypic Values of Fiber Traits
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DOI：
10.1007/s10722-004-2032-4
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发表时间：
2006-05
影响因子：
2
通讯作者：
Haiming Xu;Yong-jun Mei;Jin Hu;Jun Zhu;Ping Gong
中科院分区：
文献类型：
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作者：
Haiming Xu;Yong-jun Mei;Jin Hu;Jun Zhu;Ping Gong
采用环境效应、基因型效应和基因型与环境互作的遗传模型，对海岛棉5个纤维性状进行了遗传分析。用校正无偏预测法（AUP）对304份材料的基因型值进行了预测。不同种质之间的遗传相似性通过基于基因型值的Mahalanobis距离来测量。对抽样策略、逐步聚类中的连锁规则和抽样比例进行了评价。为构建海岛棉核心种质，采用偏离抽样策略结合单连锁聚类规则对60份海岛棉种质进行了抽样。从数量性状的平均值、方差、变异幅度和变异系数、相关系数以及前两个主成分在两个核心种质间的分布等方面分析了核心种质的遗传变异和遗传结构。结果表明，核心种质较好地代表了海岛棉种质资源的开发利用。
A genetic model, including effects of environments, genotypes, and genotype by environment interaction, was employed to analyze five fiber traits of Island cotton (Gossypium barbadenseL.). Genotypic values of 304 accessions were predicted by the adjusted unbiased prediction (AUP). Genetic similarities between different accessions were measured by Mahalanobis distances based on genotypic values. Appropriate sampling strategies, linkage rules in stepwise clustering, and sampling proportion were evaluated. To form a core collection of Island cotton, 60 accessions were sampled by the deviation sampling strategy combined with single linkage rule of hierarchical clustering. The genetic variation and structure captured by the core collection were examined in means, variances, ranges and coefficients of variation, correlation coefficients of quantitative traits, and the accessions distribution plotted by first two principal components between two collections. It was showed that the initial collection was well represented by the core collection for exploiting the Island cotton germplasm.