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Sexual Crosses with the Mucoromycete Phycomyces blakesleeanus
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在森林真菌中的二次接触时,网状物进化和生殖障碍的快速发展
Dabao Sun Lu1, David Peris2, Jørn Henrik Sønstebø3
1Department of Biosciences, University of Oslo, Blindernveien 31, 0371 Oslo, Norway.
Current biology : CB
|September 24, 2024
概括
在Trichaptum abietinum真菌中的繁殖隔离在地理上有所不同. 在北美,物种化障碍更强大,二次接触后对杂交物种的选择可能会加强.
科学领域:
- 菌类学 菌类学是指菌类学.
- 进化生物学 进化生物学
- 人口遗传学 人口遗传学
背景情况:
- 密切相关物种的繁殖障碍通常在它们共存时更强 (相似性).
- 这表明选择可能会积极加强这些障碍,特别是针对杂交后代的障碍.
研究的目的:
- 为了研究Trichaptum abietinum物种复合体内的繁殖障碍.
- 通过种群基因组学和实验方法,了解塑造这些障碍的进化过程.
主要方法:
- 全球抽取Trichaptum abietinum的样本.
- 遗传地理分析用于划分遗传群.
- 在体外交叉以评估干扰性和混合活力.
- 全基因组关联研究以确定参与生殖隔离的基因.
- 人口建模和族系遗传网络分析.
主要成果:
- 在亚洲,欧洲和北美地区确定了T. abietinum的六个主要遗传组.
- 欧洲群体是干扰性和混合的;北美群体是繁殖孤立的.
- 在亚洲亚组中观察到部分无菌性.
- 预交配障碍与基因组分歧有适度的相关性;混合生长减少与强烈相关.
- 确定了与编程细胞死亡相关的候选基因.
结论:
- 在T. abietinum的繁殖障碍显示出显著的地理差异.
- 障碍物可能是通过在普莱斯托时代的全方位分歧后的二次接触来加强的.
- T. abietinum 作为研究真菌物种化机制的模型系统.
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