TY  - EJOU
AU  - Wan, Yuqing 
AU  - Wang, Lihua 
AU  - Zhang, Qian 
AU  - Gao, Qian 
AU  - Liu, Xin 
AU  - Fan, Gaomin 
AU  - Wan, Yan 
AU  - Zheng, Xiaoqin 

TI  - Evaluation of Floral Phenotypic Diversity of Kiwifruit Male Germplasm Resources
T2  - Phyton-International Journal of Experimental Botany

PY  - 2025
VL  - 94
IS  - 9
SN  - 1851-5657

AB  - Exploring the phenotypic trait variation and diversity of kiwifruit male plant resources can support selection, breeding, and genetic improvement, ultimately enhancing agricultural production. In this study, 50 kiwifruit male plants were collected from the resource nursery of Sichuan Provincial Natural Resources Bureau. The phenotypic variation of the germplasm was analyzed using 16 quantitative traits. The analysis involved coefficient of variation (CV), Shannon-Wiener index (H), principal component analysis, correlation analysis, cluster analysis, and comprehensive evaluation. The results showed that the variation range of 16 phenotypic traits in kiwifruit male germplasm resources was 1.55% to 83.71%, with an average coefficient of variation of 28.62%, and an H index of 1.265 to 2.941. The average CVs of diploid, tetraploid, and hexaploid were 22.62%, 18.99% and 18.18%, respectively, and the average CV of diploid was the largest. Indicated that the male germplasm resources of kiwifruit showed significant phenotypic diversity, and the diploid showed higher diversity characteristics. Principal component analysis (PCA) revealed that the cumulative variance contribution rate of the first seven principal components was 76.66%, which effectively captured the information from 21 traits. Cluster analysis divided the 50 kiwifruit male germplasm resources into 4 clusters; each cluster exhibited distinct phenotypic characteristics. The analysis also determined the trait characteristics and breeding value of each cluster. The results of this study provide valuable information for genetic improvement, protection, and evaluation of kiwifruit male germplasm resources.
KW  - Kiwifruit; male germplasm; floral organ traits; genetic diversity

DO  - 10.32604/phyton.2025.071151