一个比较分析的选择压力遭受的线粒体基因组在两个植物物种与不同的气候分布的选择压力
Kang-Kang Sun1, Yi Ding1, Lei Chen1
1Department of Entomology, Nanjing Agricultural University, Nanjing 210095, China.
International journal of molecular sciences
|December 9, 2023
概括
气候影响米植物的线粒体基因组进化. 净化选择因基因和物种而异,在Sogatella furcifera中观察到更强的选择,可能是由于息地特定的代谢需求.
科学领域:
- 进化生物学 进化生物学
- 人口遗传学 人口遗传学
- 基因组学就是基因组学.
背景情况:
- 线粒体DNA (mtDNA) 对于进化研究至关重要,通常假设中性进化.
- 新出现的证据表明自然选择显著影响mtDNA进化,但驱动因素尚不清楚.
- 气候在mtDNA进化中的作用在很大程度上仍未被探索.
研究的目的:
- 研究气候对线粒体基因组进化的影响.
- 为了比较两种不同气候分布的米种类mtDNA上的选择压力:Sogatella furcifera和Laodelphax striatellus.
- 为了确定特定的基因和涉及的进化力量.
主要方法:
- 雇员dN/dS比率,麦当劳-克雷特曼 (MK) 测试和塔吉马的D测试.
- 分析了线粒体基因组13个蛋白质编码基因的选择压力.
- 在S. furcifera和L. striatellus之间比较了进化模式.
主要成果:
- 两种物种的线粒体基因组主要表现出净化选择.
- 在13个蛋白质编码基因中观察到净化选择强度的显著变化.
- 基因ND1,ND2,ND6,COIII和ATP8显示出更强的净化选择和更大的分歧.
- 与L. striatellus相比,S. furcifera在其线粒体基因组中显示出更强的净化选择.
- 线核核表皮性相互作用可能会影响COI和COII基因中的多态性.
结论:
- 气候似乎影响了米植物的线粒体基因组进化.
- 净化选择是一个关键的力量,但它的强度因基因和物种而异.
- 选择的差异可能与与不同息地相关的代谢要求有关.
- 需要进一步的研究才能充分阐明驱动这些进化模式的机制.
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