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尽管在杂交的Mimulus物种中持续存在不断的内进,但后结节障碍仍然存在

Samuel J Mantel¹, Andrea L Sweigart¹

¹Department of Genetics, University of Georgia, Athens, Georgia, USA.

Molecular ecology

|January 4, 2024

概括

尽管有大量的混合物,但Mimulus物种之间的杂交不兼容性仍然存在. 基因测绘揭示了多种多样性对后异位隔离的贡献者,突出了其在维护物种界限方面的作用.

科学领域:

进化生物学进化生物学
遗传学遗传学是一个
规格规格规格规格

背景情况:

在二次接触期间,对维护物种界限至关重要.
在自然杂交系统中理解混合不兼容性是有限的.

研究的目的:

研究自然杂交花 (Mimulus guttatus和Mimulus nasutus) 中杂交不兼容性的动态和持续性.
探索遗传因素,有助于在一个同情的群体中后异位隔离.

主要方法:

基因映射使用三种独立的复合同血统 (RILs) 种群.
进行比较绘制,以识别遗传变异和逆转.
对传输比率扭曲和连接不平衡的分析.

主要成果:

在Mimulus guttatus创始人中检测到显著的添加剂,与Mimulus nasutus的内进.
确定了三种新的假定反转,其中两种与添加物有关.
广泛的传播比率扭曲,在不同人群中不同的模式.
发现了候选多布尚斯基-穆勒不相容性和杂交花粉生存能力的位置.
即使采用有限的样本,也发现了混合不兼容性的丰富分离变异.

结论:

仿真菌种群含有多种不同的遗传因素,有助于后异位隔离.
尽管存在大量的添加物,但杂交不兼容性仍然存在,加强了它们在物种维持中的作用.
隔离后的隔离是维护Mimulus系统中物种障碍的强大力量.

关键词:

这是一个模拟物 (Mimulus Mimulus).混合不相容性混合不相容性这是一个内进的进攻.生殖隔离,生殖隔离.不孕不育的绝育性传输比率扭曲的扭曲情况

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