Zhang Jingxue, Wang Miaoli, Guo Zhipeng, Guan Yongzhuo, Guo Yuxia, Yan Xuebing
1College of Animal and Veterinary Science, Henan Agricultural University, Zhengzhou, 450002 China.
2College of Animal Science and Technology, Yangzhou University, Yangzhou, 225000 China.
Hereditas. 2018 Sep 28;155:31. doi: 10.1186/s41065-018-0068-2. eCollection 2018.
This complex environmental heterogeneity coupled with the long-standing history offers scenario suitable for and favoring the evolution and existence of variation of morphological traits.
In this study, we measured 10 morphological traits of 310 individuals sampled at 16 different locations along latitudinal gradients between 22°35'N and 36°18'N to reveal phenotypic plasticity influenced by latitude. In addition, the relationships between morphological variation and soil nutrient and climate factors were analyzed.
Analysis of variance, divesity examination and Mantel correlation test detected a significant effect of latitude on morphological traits. Cluster analysis and principal component analysis clearly separated the selected populations into four groups according to latitude. Larger morphological sizes of appeared at the low- and high-latitude regions. Correlation analysis indicated that high morphological variations were significantly correlated with climate factors and soil nutrient.
This study suggests morphological variation of wild bermudagrass is greatly influenced by latitude as well as soil and climate, which could be useful resources for genetic studies and evolution.
这种复杂的环境异质性加上悠久的历史，为形态特征变异的进化和存在提供了适宜且有利的条件。
在本研究中，我们测量了沿北纬22°35′至36°18′纬度梯度在16个不同地点采集的310个个体的10个形态特征，以揭示受纬度影响的表型可塑性。此外，还分析了形态变异与土壤养分和气候因子之间的关系。
方差分析、多样性检验和Mantel相关性检验检测到纬度对形态特征有显著影响。聚类分析和主成分分析根据纬度将所选种群明显分为四组。在低纬度和高纬度地区出现了较大的形态尺寸。相关性分析表明，高形态变异与气候因子和土壤养分显著相关。
本研究表明，野生狗牙根的形态变异受纬度以及土壤和气候的影响很大，这可能是遗传研究和进化的有用资源。
