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在现代和未来的气候下,在异构体基础灌木物种中,种群结构和杂交

Lukas P Grossfurthner^1,2, Elizabeth R Milano³, Paul A Hohenlohe²

¹Bioinformatics and Computational Biology Graduate Program, University of Idaho, Moscow, ID, United States.

Frontiers in plant science

|June 7, 2023

概括

气候变化影响大 (Artemisia tridentata) 亚种,改变它们的分布范围并促进杂交,特别是在更高的性水平上. 生态环境的保护对于保持遗传多样性和适应潜力至关重要.

科学领域:

生态学和进化生物学.
植物基因组学植物基因组学
适应气候变化适应气候变化

背景情况:

气候变化改变了植物的气候,导致相关种群的空间重叠或分离.
杂交和多重化是推动植物适应新环境的关键进化机制.
三角 (Artemisia tridentata) 是美国西部的一个基础灌木,其双倍体和四倍体细胞型占据了不同的.

研究的目的:

在当前和未来的气候条件下,评估Artemisia tridentata亚种之间的基因组特异性和杂交程度.
调查多化和杂交在大树适应干旱环境中的作用.
预测气候变化对亚种重叠和杂交潜力的影响.

主要方法:

在美国西部的五个横断区域采样,针对预测的亚种重叠的区域.
减少表现测序和采样的Artemisia tridentata种群的 ploidy-informed 基因型鉴定.
种群基因组分析以确定基因组特异性,杂交水平和基因库结构.

主要成果:

确定了明显的双胞胎亚种和至少两个独立的四胞胎基因池.
在双胞胎亚种之间检测到较低的杂交 (2.5%),但在双胞胎亚种之间发生了显著的混合 (18%).
当代的气候利基模型证实了亚种在生态中重叠,但未来的预测表明重叠的实质性损失.

结论:

杂交,特别是在平层之间,在四平大树种群的形成中起着至关重要的作用.
亚种在生态地带的共同存在对于基因交换和适应性四体变体的产生至关重要.
预计气候变化引起的范围变化威胁着亚种的重叠,可能减少杂交和招募重要的四体种群,强调了对生态保护的需要.

关键词:

ddRAD-测序的测序方法生态差异生态差异生态基质的生态基质基础的灌木灌木.异构体数据集是异构体数据集.圣人刷子圣人刷子

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