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Sex-specific gene expression differences in reproducing Syllis prolifera and Nudisyllis pulligera (Annelida, Syllidae)
Marine Genomics ( IF 1.9 ) Pub Date : 2020-04-11 , DOI: 10.1016/j.margen.2020.100772
Guillermo Ponz-Segrelles 1 , Rannyele Passos Ribeiro 1 , Christoph Bleidorn 2 , María Teresa Aguado Molina 3
Affiliation  

Syllidae is an annelid family characterized by its complex life cycles involving some of the most outstanding annelid reproductive strategies. Syllid reproductive modes sometimes imply the modification of the posterior body to form independent reproductive units (schizogamy) or the development of swimming adults (epigamy). These modes of sexual reproduction have been studied for more than 150 years, and yet, little is known regarding their molecular background. Notably, while several studies during the last three decades have revealed details about molecular mechanisms involved in the reproduction of some few model annelids, studies focusing on syllids remain limited. Thus, we performed differential gene expression analyses of female, male, and non-reproducing individuals of Syllis prolifera (schizogamic) and Nudisyllis pulligera (epigamic), as representatives of two different reproductive strategies. For that, transcriptomes from specimens of three conditions (non-reproducing, male, female) were de novo assembled and annotated for S. prolifera and N. pulligera. We found rather similar gene expression profiles for female and non-reproducing individuals, while male gene expression is clearly different. Although previous studies have suggested that femininity in syllids might require additional signalling, our analyses support a scenario, where masculinity may also involve several specific genetic processes.



中文翻译:

繁殖Syllis proliferaNudisyllis pulligera(Annelida,Syllidae)中的性别特异性基因表达差异

茜草科是一个无脊椎动物的家族,其复杂的生命周期涉及一些最杰出的无脊椎动物繁殖策略。Syllid的繁殖方式有时意味着对后身的改造,以形成独立的生殖单位(分裂配偶)或游泳成年发育(表位)。这些有性生殖方式已经研究了150多年,但对其分子背景了解甚少。值得注意的是,尽管在过去的三十年中有几项研究揭示了有关一些模型类小环虾繁殖的分子机制的详细信息,但专注于syllids的研究仍然有限。因此,我们对Syllis prolifera(schizogamic)和Syllis prolifera(分裂)的雌性,雄性和非繁殖个体进行了差异基因表达分析Nudisyllis pulligera(实生),作为两种不同生殖策略的代表。为此,从头重新组装了来自三种条件(非繁殖,雄性,雌性)的标本的转录组,并注释了S. proliferaN. Pulligera。我们发现女性和非生殖个体的基因表达谱相当相似,而男性基因表达明显不同。尽管以前的研究表明,在syllids中的女性气质可能需要更多的信号,但我们的分析支持一种场景,其中男性气质也可能涉及几个特定的​​遗传过程。

更新日期:2020-04-11
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