The influence of environmental conditions on sex determination in the blue mussel Mytilus edulis
The influence of environmental conditions on sex determination in the blue mussel Mytilus edulis
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DOI：
10.1093/icesjms/fsab272
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发表时间：
2022-03-10
影响因子：
3.3
通讯作者：
Breton, Sophie
中科院分区：
文献类型：
--
作者：
Dalpe, Andreanne;Lalonde-Larue, Ariane;Breton, Sophie
对大多数双壳类来说，影响性别决定的因素仍然是未知的。环境因素，如温度，已知会影响某些物种的性别决定，这已经被假设为贻贝贻贝，但尚未实验验证。在季节性发生的配子发生期间，成体暴露于不同的环境条件也可能影响后代的表型，包括性别决定。在双壳贝类中已经报道了代际传递效应，但是到目前为止还没有研究过父母暴露对后代性别决定的影响。为了解决这些问题，对三个不同年份收集的个体进行人工受精，并在三种不同温度下饲养它们的胚胎，以专门测试环境是否通过对父母发育中的配子和/或发育中的胚胎的影响来影响后代的性别比例。对25个杂交组合的1938个胚胎的分析表明，温度处理和取样年份对雌性比例都有显著影响。然而，总体变化主要由“温度处理x采样年份”的交互作用解释。综上所述，我们的结果表明，父母（配子发生期间）和胚胎（发育期间）经历的年际环境变化可以影响后代的性别。美味。
The factors affecting sex determination remain largely unknown for most bivalve species. Environmental factors, such as temperature, are known to influence sex determination in some species, and this has been hypothesized for the mussel Mytilus edulis, but not experimentally validated yet. Adult exposure to different environmental conditions during gametogenesis, which occurs seasonally, may also affect offspring phenotype, including sex determination. Intergenerational carryover effects have been reported in bivalves, but the impact of parental exposures on offspring sex determination has not been examined so far. To address these questions, artificial fertilizations were performed on individuals collected in three different years and their embryos were reared at three different temperatures to specifically test if the environment influences offspring sex ratio through effects on parental developing gametes and/or on developing embryos. The analysis of 1938 embryos from 25 crosses revealed a significant effect of both temperature treatments and sampling years on the proportion of females. However, the overall variation is mostly explained by the "temperature treatment x sampling years" interaction. Taken together, our results suggested that interannual environmental variations experienced by the parents (during gametogenesis) and embryo (during development) can influence the sex of the offspring in M. edulis.