Parasitoid-host associations of the genus Coccophagus (Hymenoptera: Aphelinidae) in China
Parasitoid-host associations of the genus Coccophagus (Hymenoptera: Aphelinidae) in China
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中国球虫属（膜翅目：蚜科）寄生蜂群
DOI：
10.1093/zoolinnean/zlx019
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发表时间：
2018
影响因子：
2.8
通讯作者：
Pedata Paolo Alfonso
中科院分区：
文献类型：
--
作者：
Zhou Qing-Song;Polaszek Andrew;Qin Yao-Guang;Yu Fang;Wang Xu-Bo;Wu San-An;Zhu Chao-Dong;Zhang Yan-Zhou;Pedata Paolo Alfonso
由于雄虫与雌虫之间的宿主关系不同，雄虫与雌虫之间的宿主关系也不同。异寄生蜂在寄主选择和性比决策中是一个非常有趣的问题。昆虫拟寄生蜂的准确鉴定是确定寄生蜂-寄主关系的前提。为了解开蚧虫属寄生蜂与寄主的关系，我们比较了COI条形码和28 S-D2 rRNA序列对17种蚧虫寄生蜂的鉴定和划分。通过两种不同的物种界定方法分析分子数据，自动条形码缺口发现和一般混合尤勒聚结。这两种方法都有效地区分所有以前公认的形态种。形态种划分与DNA条形码和核基因数据的一致性大大增强了我们解开Coccophagus属寄生蜂-宿主关系的能力。大多数食球虫种（17种中的11种）可以利用属于不同属的宿主种，具有不同水平的宿主特异性，特别是在宿主选择中产生雌性后代。与性别有关的差异，主机关系也被检测和讨论。
Host relationships among many Aphelinidae are complex due to their heteronomous reproductive behaviour, where males have different host relationships from females. Heteronomous parasitoids present a fascinating problem in host selection and sex ratio decision making. Accurate identification of insect parasitoids is a prerequisite in the determination of parasitoid–host relationships. With the goal of disentangling the parasitoid–host associations in the genusCoccophagus, we compared the performances of theCOIbarcode and of the28S-D2 rRNA region for identification and delimitation of 17 morphospecies ofCoccophagusparasitoid wasps collected during a 9-year rearing programme of scale insects in China. Molecular data were analysed by two different methods of species delimitation, the automatic barcode gap discovery and the general mixed yule coalescent. Both methods were effective in discriminating all previously recognized morphospecies. The congruence of morphospecies delimitation with that obtained by DNA barcode and nuclear gene data greatly enhanced our ability to unravel the parasitoid–host associations of genusCoccophagus. MostCoccophagusspecies (11 out of 17) can use host species belonging to different genera, with different levels of host specificity, particularly in host selection to produce female offspring. Sex-related differences in host relationships have also been detected and discussed.