Genetic Diversity of Cutting Flower Chrysanthemum Germplasm Resources Based on Morphological Traits
1 Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021
2 Hangzhou Lin’an Agroforestry Technology Extension Center, Lin’an, 311300
Molecular Plant Breeding, 2020, Vol. 11, No. 19
Received: 23 Aug., 2020 Accepted: 25 Aug., 2020 Published: 25 Aug., 2020
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This article was first published in Molecular Plant Breeding ( ISSN1672-416X，CN46-1068/S) in Chinese, and here was authorized to translate and publish the paper in English under the terms of Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
In order to understand the adaptability of introduced resources of chrysanthemum in Zhejiang and the development and utilization of resources, the resource diversity of 28 Phenotypic traits of 56 introduced resources of chrysanthemum was analyzed. The results showed that the genetic diversity of phenotypic traits was rich in these chrysanthemum germplasms. The variation range of the genetic diversity index of 13 quantitative characters is 1.53-2.251, among which the leaf width (2.251), ligule petals width (2.184) and number of Pedicelr
(2.062) are higher, and number of ligule petals (1.53) is the lowest; among the 15 quality characters, the Pedicelr flower color (2.004). Among the 15 quality traits, The ligulate petal coloer (2.004), the cross section shape of the widest part of ligulate petal (1.629) and the flower core color (1.457) were higher in the genetic diversity index, and the angle between primary lateral branch and stem (0.428) and stem color (0.52) were the lowest in the genetic diversity index. The variation coefficient of quantitative characters ranged from 17.85% to 93.61%. The correlation analysis showed that most of the characters showed significant correlation, among which the extremely significant positive correlation accounted for the majority. Cluster analysis showed that the resources of 56 varieties of chrysanthemum could be divided into four groups: the first group was the double petal chrysanthemum cultivar group, the second group was the double green chrysanthemum cultivar group, the third group was the non double petal chrysanthemum cultivar group, and the fourth group was the large flower type Chrysanthemum variety group.Principal component analysis showed that the characteristic values of the first nine principal components were all greater than 1, and the cumulative contribution rate was 75.55%.
Chrysanthemum; Cluster analysis; Genetic diversity; Phenotypic traits
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