Genetic diversity, population structure and association analysis in cut chrysanthemum (Chrysanthemum morifolium Ramat.)

Molecular Genetics and Genomics : MGG
Pirui LiFadi Chen

Abstract

Characterizing the genetic diversity present in a working set of plant germplasm can contribute to its effective management and genetic improvement. The cut flower chrysanthemum (Chrysanthemum morifolium Ramat.) is an economically important ornamental species. With the repeated germplasm exchange and intensive breeding activities, it remains a major task in genetic research. The purpose of the present study was to characterize the genetic diversity and the population structure of a worldwide collection of 159 varieties, and to apply an association mapping approach to identify DNA-based markers linked to five plant architecture traits and six inflorescence traits. The genotyping demonstrated that there was no lack of genetic diversity in the collection and that pair-wise kinship values were relatively low. The clustering based on a Bayesian model of population structure did not reflect known variation in either provenance or inflorescence type. A principal coordinate analysis was, however, able to discriminate most of the varieties according to both of these criteria. About 1 in 100 marker pairs exhibited a degree of linkage disequilibrium. The association analysis identified a number of markers putatively linked to one or more ...Continue Reading

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Citations

Nov 4, 2016·Molecular Genetics and Genomics : MGG·Jing WuXiao Jie
Sep 11, 2020·International Journal of Molecular Sciences·Manjulatha MekapoguJae-A Jung

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