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弱遗传隔离和假定现象特征选择在野生花 (Caryophyllaceae) 中

Jacopo Franzoni¹, Giovanni Astuti², Lorenzo Peruzzi¹

¹PLANTSEED Lab, Department of Biology, University of Pisa, 56127 Pisa, Italy.

|October 27, 2023

概括

自然选择,而不是遗传漂移,推动了Dianthus virgineus种群沿着海拔梯度的表型变化. 尽管遗传差异有限,但环境压力形成了独特的形态特征,突出了选择选择.

科学领域:

进化生物学是进化的生物学.
人口遗传学人口遗传学
生态生态学生态生态学

背景情况:

微观进化过程塑造了物种的适应.
了解遗传漂移和自然选择之间的相互作用对于进化研究至关重要.
内部变异提供了对人口水平适应的见解.

研究的目的:

为了研究沿着一个海拔梯度*Dianthus virgineus*的遗传和表型变异的模式.
区分自然选择和遗传漂移在塑造物种内变异中的作用.
评估遗传分歧,表型差异化和环境因素之间的关系.

主要方法:

使用ddRAD测序进行全基因组单核酸多态 (SNP) 基因型鉴定.
使用多变量形态学分析量化表型变异.
基因,表型,地理和海拔距离之间的统计关联测试.
对形态特征的Fst和Pst值进行比较,以推断选择与漂移.

主要成果:

在种群中观察到遗传结构较弱,主要与地理距离相关.
遗传漂移被排除为驱动表型特征变化的主要因素.
与中性遗传分歧相比,发现了高的表型差异化.
有证据表明,自然选择对形态特征起作用.

结论:

自然选择,而不是遗传漂移,是观察到的Dianthus virgineus*表型变异的主要驱动因素.
沿着海拔梯度的环境异质性可能会推动形态特征的适应性进化.
显著的表型差异化甚至可以发生在中性位置的有限遗传分歧.

关键词:

第一个是Fst.IBD IBD IBD IBD IBD IBD IBD IBD IBD IBD IBD IBD IBD IBD IBD 美国IBEIBEIBEIBEIBEIBEIBEIBEIBEIBEIBEIBEIBEIBEIBEIBEIBEIBEIBEIBEIBEIBE 地中海地中海地中海地中海地中海地中海在Pst中,Pst是Pst.升高的高度升高的高度演化演化演化演化演化演化形态测量法形态测量法形态测量法选择的选择选择的选择.

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