Does heterospecific seminal fluid reduce fecundity in interspecific copulation between seed beetles?
Does heterospecific seminal fluid reduce fecundity in interspecific copulation between seed beetles?
复制标题
异种精液是否会降低种子甲虫种间交配的繁殖力？
DOI：
10.1016/j.jinsphys.2014.11.009
复制
发表时间：
2015
影响因子：
2.2
通讯作者：
T.
中科院分区：
文献类型：
--
作者：
Kyogoku;D.;Sota;T.
近缘物种之间通过交配而造成的生殖干扰会导致适合度降低，并影响相互作用物种的种群动态。在两种种子甲间的交配实验中，中华拟豆象与斑点拟豆象、雌性拟豆象交配，而NOTC则不同。当同种交配和异种交配之后，雌性中国人遭受着显著的繁殖力损失。我们假设，与性别冲突相关的男性特征通常对女性有害，通过种间交配多向性地影响异种雌性的适合度。我们检查了射精OFC的效果。中国人只有一个。雌性斑点为生殖力丧失的原因。由于种间交配而产生的雌性斑点。我们发现，C.斑疹雌性和斑疹。对中国敏感，但不是在C之间。中国女性和DC。雄性斑点，导致种间射精从C。中国人TOC.斑点状雌性。然而，注射C。中国人的生殖器官转化为C。斑块型女性对C无显著影响。与生理盐水注射相比，异种精液转移对受精率的影响可以忽略不计。我们认为，其他有害的男性特征，如生殖器刺OFC。中国人的繁殖力下降是主要原因。斑点：经历过种间交配的雌性斑点。
Reproductive interference through mating between related species can cause fitness reduction and affect population dynamics of the interacting species. In experimental matings between two seed beetles,Callosobruchus chinensisandCallosobruchus maculatus,C. maculatusfemales, but notC. chinensisfemales, suffer from significant loss of fecundity when conspecific mating is followed by heterospecific mating. We hypothesized that male traits associated with sexual conflict, which are often harmful to females, pleiotropically affect fitness of heterospecific females through interspecific mating. We examined the effect of ejaculate ofC. chinensismales onC. maculatusfemales as the cause of the fecundity loss inC. maculatusfemales due to interspecific copulation. We found that frequent interspecific copulation occurred betweenC. maculatusfemales andC. chinensismales, but not betweenC. chinensisfemales andC. maculatusmales, resulting in frequent interspecific ejaculate transfer fromC. chinensismales toC. maculatusfemales. However, injection of the extract fromC. chinensismale reproductive organs intoC. maculatusfemales did not significantly affectC. maculatusfecundity compared with saline injection, indicating that the effect of the heterospecific ejaculate transfer on fecundity is negligible. We suggest that other harmful male traits such as genital spines ofC. chinensismales are mainly responsible for the fecundity reduction inC. maculatusfemales that have experienced interspecific mating.