在全球分布的两个科家族中,繁殖叶二态的进化既不是渐进的,也不是不可逆的,除非进一步的专业化进化
Jacob S Suissa1, Makaleh Smith2
1Department of Ecology and Evolutionary Biology, University of Tennessee Knoxville, Knoxville, TN, USA.
Evolution; international journal of organic evolution
|November 2, 2024
概括
关于不可逆转进化的多洛定律在类中受到挑战. 在Blechnaceae中,繁殖叶的二重形可以逆转,而在Onocleaceae中,进一步的专业化会导致不可逆转.
科学领域:
- 进化生物学 进化生物学
- 植物科学 植物科学
- 人类遗传学 是一个学科.
背景情况:
- 杜洛定律假定了特殊特征的不可逆转的进化.
- 陆地植物繁殖的趋势是增加复杂性而没有逆转.
- 鸟表现出不同的繁殖叶子策略 (单态与二态).
研究的目的:
- 为了测试多洛定律在的进化生殖叶的专业化.
- 为了研究单形态和双形态在的不可逆性.
- 了解影响生殖结构进化逆转的因素.
主要方法:
- 对Blechnaceae和Onocleaceae中的118个物种应用的家族遗传学比较方法.
- 用于分析生殖叶子专业化的定量形态学.
- 测试与特征的逐步进化和可逆性相关的假设.
主要成果:
- 在Blechnaceae中,二态的进化不是不可逆转的,并且显示从二态向单态的反转.
- 在Onocleaceae中,只有在肥沃叶子进一步专业化后才能观察到不可逆转的单态性.
- 除了二态性之外,其他特殊的特征似乎对进化不可逆转性至关重要.
结论:
- 杜洛定律,在其现代化的解释中,并不普遍适用于的繁殖叶的进化.
- 在种子植物中,肥沃-无菌叶形变异的演变可能由于累积的专业化而更加有道化.
- 反向变得不太可能,因为在进化过程中积累了更多的专业特征.
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