| 摘要: |
| 为探究极小种群植物滇南风吹楠 Horsfieldia tetratepala 天然种群的表型分化程度和变异规律,
文章调查了该物种 12 个天然种群的叶片、 果实的 10 个表型性状, 运用方差分析、 多重比较、 相关分析及
聚类分析方法进行了系统分析, 探讨了滇南风吹楠天然种群表型变异及其与地理环境因子的相关性。 结
果表明, 10 个表型性状在 12 个种群间均存在极显著差异 (P<0. 01), 其变异系数为 3. 36% ~ 23. 63%, 滇
南风吹楠具有丰富的表型变异。 与叶片性状相比, 种子和果实性状变异系数较小, 相对稳定。 相关分析
表明侧脉数与果实纵横径呈极显著 (P<0. 01) 负相关; 叶片长与叶片宽呈显著 (P<0. 05) 正相关, 与基
宽距呈极显著正相关; 果实纵径与果实横径呈极显著正相关, 与种子纵径呈显著正相关; 果实横径与种
子纵横径呈显著正相关; 种子纵径与种子横径呈极显著正相关。 在调查范围内, 10 个表型性状与海拔相
关不显著, 叶片侧脉数随经度增大而增多, 随纬度的增大而减少; 果实纵、 横径随经度增大而减小, 随
纬度增大而增大。 欧氏距离为 5. 0 时, 12 个天然种群可分为 3 类。 由此可见, 滇南风吹楠种群叶片和果
实表型性状具有丰富多样性, 且与地理因素存在显著关联。 |
| 关键词: 滇南风吹楠 野生种群 表型性状 |
| DOI： |
| 分类号: |
| 基金项目:云南省极小种群野生植物拯救保护专项 ( 2021SJ14X - 02 ), 云 南 省 科 技 人 才 与 平 台 计 划 ( 院 士 专 家 工 作 站) (202305AD150095)。 |
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| Analysis of Phenotypic Traits in Natural Populations of Horsfieldia tetratepala |
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Dong Shifan, Feng Yanhuang, Cai Wenliang, Zhao Man, Zhang Enxiang, Han Liang, Yu Guixiang, Dao Baohui
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Dehong Forestry Scientific Research Institute
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| Abstract: |
| In order to explore the phenotypic differentiation degree and variation pattern of the natural plant
species with extremely small population (PSESP) Horsfieldia tetratepala, this study investigated the phenotypic
traits across 12 natural populations of H. tetratepala, utilized ANOVA, multiple comparisons, correlation anal-ysis, and cluster analysis to examine 10 phenotypic characters of leaves and fruits, and its correlation with geographical and environmental factors was also analyzed. The results showed that all 10 phenotypic traits exhibited
extremely significant differences among the 12 populations (P<0. 01), with coefficients of variation of 3. 36%-23. 63%, indicating that H. tetratepala was characterized by substantial phenotypic diversity. Compared with leaf
traits, seed and fruit traits exhibited lower variation coefficients and greater stability. Correlation analysis revealed
that the number of lateral veins was significantly negatively correlated (P<0. 01) with the longitudinal and transverse diameters of fruits. Additionally, the leaf length was significantly positively correlated (P<0. 05) with the
leaf width and extremely significantly positively correlated (P<0. 01) with the basal width distance. The fruit longitudinal diameter was extremely significantly positively correlated with the fruit transverse diameter, and significantly positively correlated with the seed longitudinal diameter. The fruit transverse diameter was significantly positively correlated with both the longitudinal and transverse diameter of seeds. In the investigation zone, none of
the phenotypic traits exhibited a significant correlation with altitude. The number of leaf lateral veins showed a
positive correlation with longitude and a negative correlation with latitude. Additionally, both longitudinal and
transverse diameters of fruits exhibited an inverse relationship with longitude and a direct relationship with latitude.
When the Euclidean distance was set to 5. 0, the 12 natural populations were classified into three distinct clusters.
The research indicates that the leaf and fruit phenotypic traits of the H. tetratepala population exhibit rich diversity
and are significantly correlated with geographical factors. |
| Key words: Horsfieldia tetratepala natural population phenotypic trait |
