Diversity of Phenotypic Traits of Wild Astragalus polycladus Resource and Their Correlations with Environmental Factors in  Sanjiangyuan Area

doi:10.15933/j.cnki.1004-3268.2024.08.007

Abstract

Abstract: A total of 150 wild Astragalus polycladus plants from 6 cities（counties，towns） in Sanjiangyuan area were used as materials.The diversity，correlation and principal component analysis of 18 phenotypic traits were conducted，and their correlations with environmental factors were analyzed，so as to understand the phenotypic differentiation degree and population variation characteristics of Astragalus polycladus in Sanjiangyuan area，and provide basis for breeding excellent varieties of Astragalus polycladus.The results showed that the phenotypic traits of Astragalus polycladus resource had abundant diversity in Sanjiangyuan area，and the variation coefficient of 18 phenotypic traits was 1%—29%.Among them，the variation coefficients of stem diameter of reproductive branch and stem length of reproductive branch were higher（more than 20%），while the variation coefficients of calyx length and seed thickness were the smallest（1%）.There were significant difference in phenotypic traits of Astragalus polycladus under different environments.Among them，the crown width from south to north，plant height，root number，stem length of reproductive branch，leaf thickness，corolla length，corolla number，seed thickness and seed longitudinal diameter of Astragalus polycladus in Muli Town were significantly lower than the other populations.Correlation analysis showed that there was significantly positive or negative correlation among phenotypic traits except for root number and stem length of reproductive branch.At the same time，the phenotypic traits of Astragalus polycladus were positively or negatively correlated with longitude，latitude，altitude and soil pH value，and different traits were affected by environmental factors differently.Among them，the corolla number，leaf thickness and root number were greatly affected.

Key words: Astragalus polycladus, Phenotypic traits, Diversity analysis, Sanjiangyuan area

摘要： 以三江源地区6个市、县、镇150份野生多枝黄耆（Astragalus polycladus）为材料，对其18个表型性状进行多样性、相关性和主成分分析，并分析其与环境因子的相关性，以期了解三江源地区多枝黄耆的表型分化程度和居群变异特征，为选育多枝黄耆优良品种提供依据。结果表明，三江源地区多枝黄耆资源具有丰富的表型多样性，供试居群18个表型性状的变异系数为1%~29%，其中，生殖枝茎粗和生殖枝茎长变异系数较高（20%以上），而花萼长和种子厚变异系数最小（1%）。不同环境下的多枝黄耆表型性状存在显著差异，其中，木里镇居群多枝黄耆南北冠幅、株高、根系数、生殖枝茎长、叶厚、花冠长、花冠数、种子厚和种子纵径均显著低于其他居群。相关性分析表明，除根系数、生殖枝茎长与其他性状间无显著相关性外，其他性状间均存在显著正相关或负相关关系。同时，多枝黄耆的表型性状与经纬度、海拔和土壤pH值等环境因子有一定的正相关或负相关关系，且不同性状受环境因子影响不同，其中，花冠数、叶厚和根系数受影响较大。

关键词: 多枝黄耆, 表型性状, 多样性分析, 三江源地区

CLC Number:

S812.2

LIU Qingqing, CAI Zongcheng, LÜ Liangyu, LEI Shaqing, ZHANG Hairong, MA Fang, SHI Jianjun. Diversity of Phenotypic Traits of Wild Astragalus polycladus Resource and Their Correlations with Environmental Factors in Sanjiangyuan Area[J]. Journal of Henan Agricultural Sciences, 2024, 53(8): 61-69.

刘青青, 蔡宗程, 吕亮雨, 雷莎清, 张海蓉, 马芳, 施建军. 三江源地区野生多枝黄耆资源表型性状多样性及与环境因子的相关性分析[J]. 河南农业科学, 2024, 53(8): 61-69.

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Diversity of Phenotypic Traits of Wild Astragalus polycladus Resource and Their Correlations with Environmental Factors in Sanjiangyuan Area

三江源地区野生多枝黄耆资源表型性状多样性及与环境因子的相关性分析

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