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范围扩张的遗传后果及其对多倍体体中的二倍体化的影响
William W Booker1, Daniel R Schrider1
1Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, 27514-2916, United States of America.
bioRxiv : the preprint server for biology
|October 31, 2023
概括
多倍体动物可以殖民新的息地,但范围的扩大可能会降低适应性. 具有异体性遗传的全聚合体比自聚合体更好,其范围扩大促进了双聚合体化.
科学领域:
- 进化生物学 进化生物学
- 遗传学 遗传学 是一个
- 生态生态学 生态生态学
背景情况:
- 多重积分,拥有两组以上染色体的状态,尽管最初的健身费用很高,但很常见.
- 多倍体可能在殖民新环境方面具有优势,例如脱冰地区.
- 双胞胎的范围扩大可能会导致由于有害突变的快速固定而导致适应性降低.
研究的目的:
- 为了研究多性和遗传模式对多性范围扩张的影响.
- 为了了解范围扩大在自聚合体和全聚合体中的健身后果.
- 为了探索范围扩大如何影响细胞遗传双胞体化在autotetraploids.
主要方法:
- 进行了空间显式的前进时间模拟.
- 应用了现实的统治模式.
- 研究了两种二倍体化模型.
主要成果:
- 自极多体在范围扩大过程中经历了比双体更大的适应性减少,这是由于突变负载增加而导致的.
- 在范围扩张期间,具有异体遗传的全聚合体体在适应性方面表现出最小的后果.
- 异体常常在扩张前面比在 autotetraploids 中的范围核心更快地进化.
结论:
- 排卵性,遗传性和主导性相互作用,在范围扩张期间影响健康.
- 在新息地的殖民化过程中,allopolyploids中的二体遗传提供了显著的优势.
- 范围的扩大可以加速多倍体种群中的二倍体化,这对进化轨迹有影响.
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