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从全基因组测序中获得的脊椎动物中自我化的证据
Astrid Böhne1, Zeynep Oğuzhan2, Ioannis Chrysostomakis2
1Leibniz Institute for the Analysis of Biodiversity Change LIB, Museum Koenig Bonn, 53113 Bonn, Germany; a.boehne@leibniz-lib.de tthuenke@uni-bonn.de.
Genome research
|January 8, 2024
概括
在鱼Benitochromis nigrodorsalis中观察到一种罕见的繁殖模式,即可选择性自我. 这一发现表明,当伴侣无法获得时,自我受精可能是鱼类的适应策略.
科学领域:
- * 进化生物学 进化生物学
- * 生殖策略 繁殖策略
- * 鱼类学 鱼类学
背景情况:
- *无性繁殖,包括生,越来越多地记录在脊椎动物的种类.
- *在脊椎动物中,自我受精 (selfing) 是非常罕见的,只有在红树林鱼 (Kryptolebias marmoratus) 中一个已知的案例.
- *鱼表现出多样化的性别决定和生殖策略,包括顺序性双性化.
研究的目的:
- * 为了调查鱼Benitochromis nigrodorsalis.的可选自杀的潜在情况.
- * 确认单亲生殖,并分析基因证据支持该物种的自我生殖.
主要方法:
- *实验室观察野生捕获的Benitochromis nigrodorsalis个体在没有交配伙伴的情况下产生后代.
- *对母体及其后代的全基因组单核酸多态 (SNP) 数据分析.
主要成果:
- * 在研究的Benitochromis nigrodorsalis个体中确认了单亲生殖.
- *与外生个体相比,后代的整体异构性降低,母亲的异构性保持在51%左右.
- * 异构性模式排除了自动融合 (例如,终端或中心融合) 作为伴生遗传机制.
结论:
- *在Benitochromis nigrodorsalis中证明了选择性自我,这是一种以前被认为是双亲繁殖的物种.
- *这种生殖灵活性可以通过在伴侣缺席时确保繁殖来增强生存和进化成功.
- *这些发现扩大了鱼中已知的繁殖策略的范围.
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