Abstract Sexual reproduction is the dominant mode of reproduction in plants and animals; however, some species from various taxonomic groups reproduce asexually. Because some of these asexual species lack DNA recombination and so have low genetic variability, these asexual species are more likely to go extinct than sexual species. Neochrysocharis formosa (Westwood) (Hymenoptera: Eulophidae) is a solitary endoparasitoid in which both arrhenotokous and thelytokous strains occur in sympatry. The thelytokous strain is infected by a parthenogenesis-inducing Rickettsia bacterium. We investigated whether fertilized progeny can be produced between females and antibiotic-induced males of the thelytokous strain. The males produced by antibiotic treatment showed the same courtship behaviors as the arrhenotokous males, but at a lower rate, and did not produce fertilized progeny. The results confirm that the thelytokous strain has been maintained by a functional apomixis mechanism rather than by occasional sex, preserving a degree of heterozygosity.

中文翻译：

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与立克次体诱导产雌激素的黄蜂品系有限的交配能力

摘要 有性生殖是植物和动物的主要生殖方式；然而，来自不同分类群的一些物种是无性繁殖的。由于这些无性物种中的一些缺乏 DNA 重组，因此遗传变异性较低，因此这些无性物种比有性物种更有可能灭绝。Neochrysocharis formosa (Westwood) (膜翅目：Eulophidae) 是一种孤立的内寄生物，其中 arrenotokous 和 thelytokous 菌株同时出现。产雌孤雌生殖菌株被诱导孤雌生殖的立克次氏体细菌感染。我们调查了雌性和抗生素诱导的雌性产雌雄同株之间是否可以产生受精后代。抗生素治疗产生的雄性表现出与 arrenotokous 雄性相同的求偶行为，但比率较低，并且没有产生受精后代。结果证实，产雌孤雌生殖品系是通过功能性无融合生殖机制而不是偶尔的性行为维持的，保留了一定程度的杂合性。