数字农科院2.0

Genetic Diversity Of Common Bean (Phaseolus Vulgarisl.) Germplasm Resources In Chongqing, Evidenced By Morphological Characterization

文献类型： 外文期刊

作者： Long, JC; Zhang, JJ; Zhang, XC; Wu, J; Chen, H; Wang, P; Wang, Q; Du, CZ

作者机构：

关键词： Common Bean; Genetic Diversity; Cluster Analysis; Principal Component Analysis; Morphological Characterization

期刊名称： FRONTIERS IN GENETICS

ISSN：

年卷期： 2020 年 11 卷

页码：

收录情况： JCR（2021版）

摘要： In this study, the genetic diversity of 115 common bean germplasm resources collected from 27 counties in Chongqing over 3 years (2015-2017) was assessed. The results showed that the genetic diversity of the common bean germplasm resources was high, with an average diversity index of 1.447. The diversity of the qualitative traits of each organ was ranked as seed (H '= 1.40) > pod (H '= 1.062) > plant (H '= 0.64) > leaf (H '= 0.565), while the diversity of the quantitative traits of each organ was ranked as seed (H '= 2.021) > pod (H '= 1.989) > phenology (H '= 1.941) > plant (H '= 1.646). In the cluster analysis, 115 accessions were clustered into four groups. The accessions in the first and fourth group were characteristic of the Andean gene pool, while the accessions in the second group were characteristic of the Mesoamerican gene pool. However, the accessions of the third group possessed the combined characteristics of both gene pools and were thus classified as introgressed type. Four principal components represented 40.30% of the morphological diversity, with the first principal component representing the traits associated with plant growth; the second principal component representing flower characteristics; the third principal component being composed of seed characters; and the fourth principal component representing pod characteristics. The common bean germplasm resources are widely distributed in Chongqing, and the introgressed types are more prevalent in this region than elsewhere, with a rich genetic diversity and high utilization value in genetic breeding.

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