灰飞虱Wolbachia群体生物学的遗传特性研究

Ｗｏｌｂａｃｈｉａ是存在于多种昆虫生殖器官的一类共生菌，它可能在宿 主群体中引起细菌质不亲和性而给宿 主带来生殖优势。对灰飞虱体内的Ｗｏｌｂａｃｈｉａｆｊｔｆｄｇｐｗ，ｖ ｇｍ ｐｇｃｆｍｗ ｑｎｎｋｕｄｙｊｒ ｄｏ ｎｕｉ

Factors Affecting Population Biology of Wolbachia in the Small Brown Planthoppers,Laodelphax striatellus, (Homoptera: Delphacidae)

Bacteria in the genus Wolbachia are endosymbionts found in the reproductive tissues of insects accross a wide taxonomic spectrum. They cause cytoplasmic incompatibility between strains and related species in their hosts, thus impart a reproductive advantage for them. We studied Wolbachia in the Small Brown Planthoppers and found that Wolbachia transmission rate in the cloutes bred in lab was nearly 100%, while it was a bit lower in fieldcollected ones. This is possibly one of the reasons why there remains a polymorphism of Wolbachia infection in the nature. We also found that Wolbachia had positive effect on host fecundity, which is of great significance for us to make clear the evolutionary biology of Wolbachia. Our experiment also showed that the Wolbachia strain under investigation caused high level of cytoplasmic incompatibility. These three major factors that affect population biology of Wolbachia will help us establish a system to drive other maternally inherited symbionts into wild population, thus the useful genes transformed into the symbionts can be spread among the host populations.