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《Journal of Biomathematics》 2005-03
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Study on Constructing Core Collection Based on Plant Molecular Markers and Quantitative Traits

XU Hai-ming~1 HU Jin~1 QIU Ying-xiong~2 (1 Department of Agronomy,Zhejiang University,Hangzhou Zhejiang 310029 China)(2 Department of life science,Zhejiang University,Hangzhou Zhejiang 310029 China)  
A method for constructing core collection based on plant molecular markers and quantitative traits is proposed.A genetic model with GE interaction and mixed model approaches are used for predicting genetic values of quantitative traits.Similarity coefficients between different accessions are calculated,respectively,by molecular markers and genotypic values.Equal weighted strategy on two coefficients is employed to calculate similarity distance among varieties in order to group accessions by the unweighted pair group method with arithmetic average (UPGMA) of hierarchical clustering.The core collection is developed by the stepwise clustering procedure at appropriate sampling proportion.A worked example is presented using a rice DH population consisted of 111 genetic individuals with eight quantitative traits and molecular data of 175 loci. Four core collections are constructed by random sampling at four sampling proportions (25%, 20%,15%,10%),the validation of the proposed method is illustrated by evaluating the molecular marker diversity and genetic variation of quantitative traits for representing initial population by the core collections.
【Fund】: 国家自然科学基金(30270759);; 国家重点基础研究发展规划项目(G2000046806)
【CateGory Index】: S32;
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