Sampling a Core Collection of Island Cotton (Gossypium barbadense L.) Based on the Genotypic Values of Fiber Traits |
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Authors: | Haiming Xu Yongjun Mei Jin Hu Jun Zhu Ping Gong |
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Institution: | (1) Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310029, China;(2) College of Plant Science and Technology, Tarimu University of Agricultural Reclamation, Alar, Xinjiang, 843300, China |
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Abstract: | A genetic model, including effects of environments, genotypes, and genotype by environment interaction, was employed to analyze
five fiber traits of Island cotton (Gossypium barbadense L.). 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.
These authors contributed equally to this work. |
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Keywords: | Core collection Fiber traits Genotypic value Germplasm Gossypium barbadense L |
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