Parental care results in a greater mutation load, for which it is also a phenotypic antidote.
Parental care results in a greater mutation load, for which it is also a phenotypic antidote.
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DOI：
10.1098/rspb.2023.0115
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发表时间：
2023-05-31
影响因子：
4.7
通讯作者：
Kilner, Rebecca M.
中科院分区：
文献类型：
--
作者：
Pascoal, Sonia;Shimadzu, Hideyasu;Mashoodh, Rahia;Kilner, Rebecca M.
仁慈的社会行为，如亲代照顾，被认为能使轻度有害的突变持续存在。我们用双亲本抚养的埋葬甲虫Nicrophorus vespilloides实验验证了这一预测。在20代的实验中，我们允许重复实验埋甲虫种群在孵化后得到照顾（“完全照顾”种群）或没有照顾（“不照顾”种群）的进化。然后我们建立了新的谱系，从这些实验群体中播种，我们近交来评估它们的突变负荷。近交系作为对照。我们还测试了更大突变负荷的有害影响是否可以通过亲代照顾来掩盖，让一半的谱系接受孵化后的照顾，而另一半没有。我们发现，完全照顾群体的近交系比不照顾群体的近交系灭绝得更快——但只有在后代孵化后没有得到照顾的情况下。我们推断，完全照护谱系携带了更大的突变负荷，但如果幼虫得到亲代照护，则可以克服相关的有害影响。我们认为亲代抚育引起的突变负荷增加增加了种群对抚育的依赖。这可以解释为什么一旦关爱进化就很少丢失。
Benevolent social behaviours, such as parental care, are thought to enable mildly deleterious mutations to persist. We tested this prediction experimentally using the burying beetle Nicrophorus vespilloides, an insect with biparental care. For 20 generations, we allowed replicate experimental burying beetle populations to evolve either with post-hatching care (‘Full Care’ populations) or without it (‘No Care’ populations). We then established new lineages, seeded from these experimental populations, which we inbred to assess their mutation load. Outbred lineages served as controls. We also tested whether the deleterious effects of a greater mutation load could be concealed by parental care by allowing half the lineages to receive post-hatching care, while half did not. We found that inbred lineages from the Full Care populations went extinct more quickly than inbred lineages from the No Care populations—but only when offspring received no post-hatching care. We infer that Full Care lineages carried a greater mutation load, but that the associated deleterious effects on fitness could be overcome if larvae received parental care. We suggest that the increased mutation load caused by parental care increases a population's dependence upon care. This could explain why care is seldom lost once it has evolved.
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影响因子：
2.5
作者：
Eggert, AK;Reinking, M;Müller, JK
通讯作者：
Müller, JK
影响因子：
10.1
作者：
CROW, JF
通讯作者：
CROW, JF
影响因子：
16.8
作者：
Farkas, Zoltan;Kovacs, Karoly;Papp, Balazs
通讯作者：
Papp, Balazs
影响因子：
3.4
作者：
Franz M;Schülke O;Ostner J
通讯作者：
Ostner J
DOI：
10.1073/pnas.2102450118
发表时间：
2021-11-30
影响因子：
11.1
作者：
Duarte A;Rebar D;Hallett AC;Jarrett BJM;Kilner RM
通讯作者：
Kilner RM