独特的古老结构多态度控制在核桃和hickories中异构性
Jeffrey S Groh1,2, Diane C Vik1, Kristian A Stevens1,3
1Department of Evolution and Ecology, University of California, Davis.
bioRxiv : the preprint server for biology
|January 8, 2024
概括
这项研究研究了异性双性,即核桃和 pecans 的交配系统,揭示了控制这种花特征的两个古老遗传机制. 这些发现揭示了植物交配系统和平衡选择的演变.
科学领域:
- * 进化生物学 进化生物学
- * 植物遗传学
- * 分子生态学 * 分子生态学
背景情况:
- * 异质双性是一种平衡的交配多态性在苗中,常见于Juglandaceae (核桃和 pecans).
- * 这种对维持物种繁殖成功至关重要的系统,在Juglans*和Carya*两种属中都由单一的主导等位基因控制.
- * 了解异种类的遗传基础,可以了解平衡选择和植物交配系统的演变.
研究的目的:
- *为了精确地绘制控制Juglans和Carya*中异性恋的遗传位置.
- * 描述这些位置的结构变异和进化历史.
- * 调查与异性婚相关的分子机制和基因表达模式.
主要方法:
- * 在Juglans和Carya*中精细地绘制异性双性基位.
- *比较基因组学用于识别结构变异和跨物种多态.
- *基因表达分析 (RNA测序) 在正在发育的花组织中.
- *可转移元素含量和遗传多样性的分析.
主要成果:
- * 两种不同的古老 (>50万年前) 结构变异控制了Juglans和Carya*中的异构婚姻.
- * 在 *Juglans* 中,位置涉及接近 *TPPD-1* 的结构变异,在雄花和小RNA生成中具有差异性等位基特异性表达.
- 在 *Carya* 中,位点是跨越 20 个基因的大群多态,由于可转移元素的积累,主导单元型的多样性减少.
结论:
- * Juglandaceae 中的异性婚由古老的,独特的遗传机制控制,涉及结构变异和基因集群.
- *这些发现强调了平衡选择在通过不同的进化途径塑造复杂的交配系统中的作用.
- *这项研究表明,对异性夫妻制的额外遗传系统可能存在于其他属中.
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