四种捕食性瓢虫生殖系统观察

来源:用户上传      作者:刘志伟 王永跃 黄丹青 毕可可

　　摘要 捕食性瓢x是生物防治中害虫的重要天敌，具有广阔的应用前景。为评价几种重要天敌瓢虫的生殖潜能，通过内部解剖观察了四斑小瓢虫Scymnus （Pullus） quadrillum、双麟弯叶毛瓢虫Nephus （Geminosipho） dilepismoides、淡色斧瓢虫Axinoscymnuscardilobus和广东食螨瓢虫Stethorus （Stethotus） cantonensis四种捕食性瓢虫的内生殖系统结构。结果显示，4种瓢虫雄性内生殖系统基本构成包括精巢、输精管、射精管、储精囊、附腺，淡色斧瓢虫、双麟弯叶毛瓢虫含2对附腺，广东食螨瓢虫和四斑小瓢虫附腺不明显;4种瓢虫的精巢形态和精巢管数量差异很大，四斑小瓢虫、双麟弯叶毛瓢虫、淡色斧瓢虫和广东食螨瓢虫每侧精巢管数量分别是5、5、2和1根。4种瓢虫雌性内生殖系统基本构成包括卵巢、侧输卵管、中输卵管、生殖腔、受精囊，四斑小瓢虫、双麟弯叶毛瓢虫、淡色斧瓢虫和广东食螨瓢虫每侧卵巢管数量分别是5、6、2和2根，广东食螨瓢虫的受精囊极不明显，且侧输卵管直接连接生殖腔。
　　关键词 生物防治;瓢虫;生殖系统;卵巢;精巢
　　中图分类号 S476.2 文献标识码 A DOI：10.12008/j.issn.1009-2196.2022.03.016
　　Observation of Reproductive System of Four Species of Predacious Ladybirds
　　LIU Zhiwei1，2 WANG Yongyue1 HUANG Danqing1 BI Keke1
　　（1. Guangzhou Institute of Forestry and Landscape Architecture， Guangzhou， Guangdong 510405， China;2. Ministry of Education Engineering Research Center of Biological Control， South China Agricultural University， Guangzhou， Guangdong 510642， China）
　　Abstract Predacious ladybirds are important natural enemies of insect pests in biological control with a broad application prospect. In order to evaluate the fecundity of different species of ladybirds， the internal reproductive system of four species of ladybirds， i.e.Scymnus （Pullus） quadrillum， Nephus （Geminosipho） dilepismoides， Axinoscymnuscardilobus and Stethorus （Stethotus） cantonensis， were observed by dissection. The results showed that the male internal reproductive system of the four ladybird species included testis， vas deferens， ejaculatory ducts， seminal vesicle and paragonia glands. Two pairs of paragonia glands exist in A. Cardilobus and N. dilepismoides， but they are not obvious in the other species. The structure of testes and the number of testicular tubes of the four species of ladybirds are greatly different. The number of testicular tubes on each side of the testes of S.（Pullus） quadrillum， N.（Geminosipho） dilepismoides， A. cardilobus and S.（Stethotus） cantonensis is five， five， two and one. The female internal reproductive system of the four species of ladybirds consists of ovary， lateral oviduct， median oviduct， genital chamber and spermatheca. The number of ovarioles on each side of the ovary of S.（Pullus） quadrillum， N.（Geminosipho） dilepismoides， A. cardilobus and S.（Stethotus） cantonensis is five， six， two and two. For S. cantonensis the spermatheca is not obvious， and the lateral oviduct is directly connected to the genital chamber.

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