Resarch On Wolbachia In The Regulation Of Reproductive Of Echinothrips Americanus

The invasive species posittia thrips,Echinothrips americanus Morgan, belongs to the new invasivespecies in china. This species has a broad host plant range, posing a potential threat to ornamentals andgreenhouse crops. Wolbachia is a maternally inherited intracellular bacterium that could infect a wide rangeof arthropods. Wolbachia are transmitted through the cytoplasm of eggs and have evolved variousmechanisms for manipulating reproduction of their hosts, including cytoplasmic incompatibility (CI),parthenogenesis induction (PI), male-killing and feminization. Some studies have confirmed: Therelationship between E. americanus in containing Wolbachia and Drosophila melanogaster infection ofWolbachia are closer.The symbiotic bacteria inside adrosophila has been confirmed to belong to induce CIphenomenon in the A group MEL subsets, In this paper,through four groups of cross experiments.Trying toprove that the bacteria on the reproductive effects of posittia thrips. The result shows:1. Comparing with the Natur E.americanus population (W+), and without symbiotic population (W-)female preoviposition period shortening, to extend the life of aduit, egg laying rate increased.Aposymbiosisintrinsic rate of population growth（rm）is not off the symbiotic population high. This result showed that:Wolbachia reduces the intrinsic E. americanus growth rate (rm).2. In the cross experiment, the spawning trend of female E.americanus were similar.the asymbioticfemale had higher fecundity and longer oviposition duration than female with the bacteria,and the twoparaments were not revelant with the infection of male. The resultshowed that: Wolbachia does not have acytoplasmic incompatibility effect on population of E.americanusThe paper explores a nice foundation for co-evolutionary between the wolbachia and their host, andwill be a guid for using the endosymbiosis bacteriain pest control.