Behavioural tactic predicts preoptic-hypothalamic gene expression more strongly than developmental morph in fish with alternative reproductive tactics

Behavioural tactic predicts preoptic-hypothalamic gene expression more strongly than developmental morph in fish with alternative reproductive tactics
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行为策略比采用替代生殖策略的鱼类的发育形态更能预测视前下丘脑基因表达

DOI:
10.1098/rspb.2017.2742
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发表时间:
2018
期刊:
Proceedings of the Royal Society B: Biological Sciences
影响因子:
--
通讯作者:
Bass, Andrew H.
Bass, Andrew H.
中科院分区:
--
文献类型:
--
作者:
Tripp, Joel A.;Feng, Ni Y.;Bass, Andrew H.

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生殖成功依赖于社会行为的协调,如领土保卫、求偶和交配。在繁殖策略上具有极端变异的物种是识别社会行为可塑性背后的神经机制的有用模型。平鳍见习(Porichthys notatus)是硬骨鱼与两个男性生殖形态,遵循广泛不同的发展轨迹和显示替代生殖策略(ART)。第一类男性捍卫领地,追求女性,提供父爱,但如果他们不能维持领地,他们会求助于戴绿帽子。第二类雄性只通过戴绿帽子繁殖。我们试图从那些仅仅反映发育形态的基因表达模式中,解开行为策略(在这种情况下是ART)背后的基因表达模式。使用RNA测序,我们研究了差异转录表达的视前区-下丘脑前部(POA-AH)的求爱型I男性,戴绿帽子的I型男性和戴绿帽子的II型男性。出乎意料的是,POA-AH差异表达更强烈地耦合到行为策略比形态。这包括一套涉及脊椎动物社会行为激素调节的转录本。我们的研究结果表明,不同的表达模式在一个保守的神经内分泌中心已知调节社会生殖行为的脊椎动物谱系可能是解耦的发展历史,使可塑性的表现生殖策略。
Reproductive success relies on the coordination of social behaviours, such as territory defence, courtship and mating. Species with extreme variation in reproductive tactics are useful models for identifying the neural mechanisms underlying social behaviour plasticity. The plainfin midshipman (Porichthys notatus) is a teleost fish with two male reproductive morphs that follow widely divergent developmental trajectories and display alternative reproductive tactics (ARTs). Type I males defend territories, court females and provide paternal care, but will resort to cuckoldry if they cannot maintain a territory. Type II males reproduce only through cuckoldry. We sought to disentangle gene expression patterns underlying behavioural tactic, in this case ARTs, from those solely reflective of developmental morph. Using RNA-sequencing, we investigated differential transcript expression in the preoptic area-anterior hypothalamus (POA-AH) of courting type I males, cuckolding type I males and cuckolding type II males. Unexpectedly, POA-AH differential expression was more strongly coupled to behavioural tactic than morph. This included a suite of transcripts implicated in hormonal regulation of vertebrate social behaviour. Our results reveal that divergent expression patterns in a conserved neuroendocrine centre known to regulate social-reproductive behaviours across vertebrate lineages may be uncoupled from developmental history to enable plasticity in the performance of reproductive tactics.
平鳍见习官鱼的替代雄性产卵策略和声学信号
DOI: --
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期刊:
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