High indirect fitness benefits for helpers across the nesting cycle in the tropical paper wasp Polistes canadensis.
High indirect fitness benefits for helpers across the nesting cycle in the tropical paper wasp Polistes canadensis.
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对于热带纸黄蜂 Polistes canadensis 整个筑巢周期的帮助者来说，间接的健身效益很高。
DOI：
10.1111/mec.15137
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发表时间：
2019
影响因子：
4.9
通讯作者：
Southon RJ
中科院分区：
文献类型：
--
作者：
Southon RJ
解释非生殖的真社会性昆虫中帮助行为的进化（“工人”）个人帮助抚养其他个人的后代蜂后（“queens”）仍然是自然界中最令人困惑的现象之一。胡蜂是流行的研究模型，因为工蜂保留了繁殖的能力：这种全能性很可能代表了社会进化的早期阶段。政治被认为起源于热带地区，在那里，对生殖选择的季节性限制很弱，社会群体实际上是常年存在的。然而，大多数Polistes的研究都集中在非热带物种上，季节性导致家庭群体分散;共同发现，第二年春天形成新巢的衣服通常是不相关的，从而提出通过巢遗传的直接适应性是帮助行为进化的关键。在这里，我们提出了第一个全面的遗传研究的社会结构的常年筑巢周期的tropicalPolistes-Polistes canadensis。使用微卫星和新开发的单核苷酸多态性标记，我们表明，成人cofoundresses是高度相关的，育雏生产是由一个单一的女性在整个筑巢周期垄断。因此，在tropicalPolistesnonreproductive cofoundresses有可能获得高的间接健身的好处，从一开始的群体形成的助手，这些好处持续通过筑巢周期。在Polistesociality的起源中，直接适应性可能不如以前所认为的那么重要。这些发现强调了在考虑生殖策略的进化时，研究一系列具有不同生活史和生态的物种的重要性。
Explaining the evolution of helping behaviour in the eusocial insects where nonreproductive (“worker”) individuals help raise the offspring of other individuals (“queens”) remains one of the most perplexing phenomena in the natural world.Polistespaper wasps are popular study models, as workers retain the ability to reproduce: such totipotency is likely representative of the early stages of social evolution.Polistesis thought to have originated in the tropics, where seasonal constraints on reproductive options are weak and social groups are effectively perennial. Yet, mostPolistesresearch has focused on nontropical species, where seasonality causes family groups to disperse; cofoundresses forming new nests the following spring are often unrelated, leading to the suggestion that direct fitness through nest inheritance is key in the evolution of helping behaviour. Here, we present the first comprehensive genetic study of social structure across the perennial nesting cycle of a tropicalPolistes—Polistes canadensis. Using both microsatellites and newly developed single nucleotide polymorphism markers, we show that adult cofoundresses are highly related and that brood production is monopolized by a single female across the nesting cycle. Nonreproductive cofoundresses in tropicalPolistestherefore have the potential to gain high indirect fitness benefits as helpers from the outset of group formation, and these benefits persist through the nesting cycle. Direct fitness may have been less important in the origin ofPolistessociality than previously suggested. These findings stress the importance of studying a range of species with diverse life history and ecologies when considering the evolution of reproductive strategies.