副本数量的变化有助于在入侵植物中并行进行本地适应
Jonathan Wilson1, Vanessa C Bieker2, Lotte van Boheemen1
1School of Biological Sciences, Monash University, Melbourne, VIC 3800, Australia.
概括
副本数变化 (CNVs) 推动自然种群的快速适应. 这项研究揭示了在入侵性杂草Ambrosia artemisiifolia的适应过程中,CNVs的广泛重用.
科学领域:
- 进化生物学是进化的生物学.
- 基因组学就是基因组学.
- 人口遗传学 人口遗传学
背景情况:
- 适应是物种进化的关键,但其遗传基础往往不清楚.
- 拷贝数变异 (CNV) 是快速适应的可疑驱动因素,但由于后勤挑战,全基因组研究很少.
- 之前的研究集中在候选基因上,限制了对CNV在适应中的作用的全面理解.
研究的目的:
- 为了对CNV对适应的贡献进行全基因组分析.
- 研究CNVs在入侵性杂草Ambrosia artemisiifolia的适应性进化中的作用.
- 评估本地和入侵范围之间的平行适应特征.
主要方法:
- 在Ambrosia artemisiifolia中对CNV进行全基因组分析.
- 使用本地主要成分分析 (PCA) 进行CNV基因型鉴定.
- 从跨越两个世纪的样本中分析了全基因组序列.
主要成果:
- 确定了16个大型CNV区域,其中一些超过11个大数据库.
- 在北美和欧洲种群之间观察到CNV的平行本地适应特征.
- 发现了8个具有快速进化变化和随着时间的推移显著频率转移的CNV区域.
结论:
- CNVs提供了令人信服的全基因组证据,证明了自然种群的快速适应.
- 在不同地理范围适应类似的选择性压力时,证实了CNV的广泛再利用.
- 突出了CNV在当代进化适应中的重要作用.
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