不同种源地浙江楠种子形态特征与环境因子的相关性OA

[Purpose]The study explored the correlations between morphological characteristics of Phoebe chekiangensis seeds from different provenances and environmental factors,aiming to provide a theoretical basis for the collection of germplasm resources and the breeding of elite varieties.[Method]Seeds of Ph.chekiangensis from 13 provenances,including Jiangxi,Zhejiang,Anhui,Hu-bei,and Hunan,were collected.Morphological characteristic indices such as seed length,seed width,length-to-width ratio,and 1 000-seed weight were measured.The morphological characteristics of seeds among different provenances were compared,and clus-ter analysis was conducted.Furthermore,correlation analysis were performed for geographical factors and soil factors of provenances with the morphological characteristics of seeds.[Result](1)Significant or extremely significant differences were observed in the morphological characteristics of Ph.chekiangensis seeds from different provenances.The coefficients of variation for seed length,seed width,length-to-width ratio,and 1 000-seed weight were 7.16%,6.05%,8.04%,and 12.60%,respectively.Notably,the coeffi-cient of variation for 1 000-seed weight was the highest.(2)Cluster analysis indicated that when the Euclidean distance was set at 2.5,Ph.chekiangensis seeds from 13 provenances could be distinctly categorized into three major groups.However,the classification of provenances showed little correlations with geographical locations,and no obvious regional characteristics were observed.(3)The correlation analysis revealed that seed length had a significantly negative correlation with altitude.Seed width exhibited significantly negative correlations with longitude and pH value but a significantly positive correlation with hydrolyzable nitrogen content.The length-to-width ratio had a significantly positive correlation with pH value,extremely significantly negative correlations with hydrolyz-able nitrogen content and total nitrogen content,and significantly negative correlations with organic matter content and altitude.[Conclusion]The morphological characteristics of Ph.chekiangensis seeds from different provenances exhibit rich variations,and the 1 000-seed weight can serve as an important indicator of seed variation degree.The variations in these morphological characteris-tics are closely related to environmental factors,which reflect the adaptability of Ph.chekiangensis seeds to the environments of differ-ent provenances.