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繁殖策略的多个进化过渡在水生殖民地无脊椎动物的类
Heather E Grant1,2, Andrew N Ostrovsky3,4, Helen L Jenkins2,5
1Centre for Evolution and Cancer, The Institute of Cancer Research, 15 Cotswold Road, Sutton SM2 5NG, UK.
Proceedings. Biological sciences
|November 1, 2023
概括
动物的家长照顾,特别是胚胎化室,在Cheilostomatida序列中至少独立进化了10次. 这种多样性很可能源于它们的模块化体型,促进了各种化策略.
科学领域:
- 进化生物学是进化的生物学.
- 海洋无脊椎动物动物学
- 动物研究的研究.
背景情况:
- 在许多动物群体中,父母的照顾对于后代的生存和进化成功至关重要.
- 动物 (Phylum Bryozoa) 展示了各种胚胎化方法,主要是在繁殖室内或内内.
- 切洛斯托姆动物化室的形态变异表明了多个独立的进化起源.
研究的目的:
- 为了研究胚胎化结构的进化历史,在布里奥索动物序列Cheilostomatida.
- 为了测试Cheilostomatida内的不同繁殖室的多个独立起源的假设.
- 为了重建不同化装置的种群的遗传关系.
主要方法:
- 使用线粒体数据和核rRNA基因 (18S和28S) 构建分子系谱.
- 综合的分类样本采集,包括具有不同化结构的物种.
- 祖先特征状态估计,以推断育室的演变.
主要成果:
- 遗传学分析和祖先特征估计表明,在Cheilostomatida中,至少有10种不同的繁殖室类型的独立进化.
- 在特定的种群中繁殖,例如 *Eucratea loricata* 和 *Aetea* spp. 显然是从一个胚胎发育的祖先进化出来的.
- 其他带有明显的骨和非骨化室的类型也可能起源于一个胚胎发育的祖先状态.
结论:
- 凯洛斯托姆动物中各种各样的胚胎化室是通过许多独立的进化事件产生的.
- 动物的模块化结构可能促进了复杂多样化的母体化结构的演变.
- 这项研究突出了家长关怀进化在动物多样化中的重要作用.
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