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王的演变来自隐士的祖先
C W Cunningham1, N W Blackstone, L W Buss
1Department of Biology, Yale University, New Haven, Connecticut 06511.
Nature
|February 6, 1992
概括
国王是从隐士进化而来的,在13-25百万年内失去了的习惯,并发展出类似的形式 (癌化). 这种快速的转变是理解甲动物进化的一个关键发现.
科学领域:
- 海洋生物学 海洋生物学
- 进化生物学 进化生物学
- 甲动物研究研究
背景情况:
- 国王 (Lithodidae家族) 表现出类似的形态和大小,与依赖贝的隐士形成鲜明对比.
- 隐士的进化受到生活的限制,需要特定的腹部形态和限制尺寸.
- 癌变,即从隐士祖先进化出类似的形式,在几个血统中独立发生.
研究的目的:
- 为了确定国王的癌变的进化速率.
- 为了研究国王和隐士之间的遗传关系.
- 为了估计贝居住的丧失和国王类类形态的发展的时间框架.
主要方法:
- 分子遗传学分析以重建进化关系.
- 对王和隐士进行比较形态研究.
- 分子时钟的估计,以日期进化事件.
主要成果:
- 分子证据证实,国王在隐士属Pagurus中筑巢.
- 从居住的隐士转变为完全有癌的国王发生的速度很快.
- 据估计,完全致癌的时间范围在1300万至2500万年之间.
结论:
- 国王是一种高度衍生的隐士,它迅速演变为类似的形态.
- 王的进化表明了加速形态进化的非凡案例.
- 了解这种转变可以了解甲类动物的进化可塑性.
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