Female crickets assess relatedness during mate guarding and bias storage of sperm towards unrelated males
Female crickets assess relatedness during mate guarding and bias storage of sperm towards unrelated males
复制标题
雌性蟋蟀在保护配偶期间评估相关性，并将精子储存偏向不相关的雄性
DOI：
10.1111/jeb.12118
复制
发表时间：
2013
影响因子：
2.1
通讯作者：
L. Simmons
中科院分区：
文献类型：
--
作者：
C. Tuni;M. Beveridge;L. Simmons
最近的证据表明，雌性在交配受精后偏向于无血缘关系的雄性，以避免近亲繁殖产生的遗传不相容。昆虫受精偏向的机制之一是雌性控制精子向精子储存器官的运输。我们研究了大洋蟋蟀雌体交配后的近亲交配-避免机制。我们评估了有血缘关系和无血缘关系的雄性对双性交配雌性精子库的相对贡献。为了明确地证明，有偏见的精子存储是由雌性控制而不是神秘的雄性选择造成的，我们操纵了交配雄性和执行交配后配偶保护的雄性之间的相关性。我们的结果表明，当有一只有血缘关系的雄性守卫时，雌性储存的实际配偶的精子较少，而与交配雄性的血缘关系无关。我们的数据支持这样一种观点，即雌性蟋蟀对精子储存的抑制可以作为一种神秘的雌性选择形式，以避免近亲繁殖的严重负面影响。
Recent evidence shows that females exert a post‐copulatory fertilization bias in favour of unrelated males to avoid the genetic incompatibilities derived from inbreeding. One of the mechanisms suggested for fertilization biases in insects is female control over transport of sperm to the sperm‐storage organs. We investigated post‐copulatory inbreeding‐avoidance mechanisms in females of the cricket Teleogryllus oceanicus. We assessed the relative contribution of related and unrelated males to the sperm stores of double‐mated females. To demonstrate unequivocally that biased sperm storage results from female control rather than cryptic male choice, we manipulated the relatedness of mated males and of males performing post‐copulatory mate guarding. Our results show that when guarded by a related male, females store less sperm from their actual mate, irrespective of the relatedness of the mating male. Our data support the notion that inhibition of sperm storage by female crickets can act as a form of cryptic female choice to avoid the severe negative effects of inbreeding.