Fitness of a genetically improved entomopathogenic nematode |
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| Affiliation: | 1. Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China;2. CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China;3. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;4. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Jilin 130102, China;5. University of Chinese Academy of Sciences, Beijing 100049, China;1. Hubei Engineering Technology Research Center of Energy Photoelectric Device and System, Hubei University of Technology, Wuhan 430068, PR China;2. School of Science, Hubei University of Technology, Wuhan 430068, PR China;3. Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou 221008, PR China;4. Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University, Beijing 102206, PR China |
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| Abstract: | A strain of Steinernema carpocapsae (G-13) selectively bred for improved host-finding was compared against two wild-type strains, the commercially available All strain and the Foundation strain from which the G-13 strain was derived, for changes in fitness. Selection did not affect pathogenicity, mobility, sex ratio, or morphology. However, the G-13 strain showed a gain of fitness with regard to host penetration and reproductive potential and a loss of fitness for storage stability. Acquiring enhanced host-finding abilities does not appear to be correlated with a serious reduction in overall fitness, and the potential of the selected G-13 strain for inundative biological control appears unlikely to be impaired. The possible significance of the three correlated responses to selection are discussed. |
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