The influence of temporal and seasonal changes on genetic diversity and population structure of the tsetse fly, Glossina pallidipes in Kenya
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The Department of Entomology seeks to teach the study of insects, their life-cycles, and the practicalities in dealing with them, for use in the fields of business, industry, education, and public health. The study of entomology can be applied towards evolution and ecological sciences, and insects’ relationships with other organisms & humans, or towards an agricultural or horticultural focus, focusing more on pest-control and management.
History
The Department of Entomology was founded in 1975 as a result of the division of the Department of Zoology and Entomology.
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- College of Agriculture and Life Sciences (parent college)
- Department of Zoology and Entomology (predecessor, 1975)
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Abstract
The Tsetse fly. Glossina palltdipes. (Diptera: Glossinidae) is an important vector of animal trypanosomiasis It has also been implicated in the transmission of pathogens that cause human African trypanosomiasis. Understanding how G. palhdipes populations vary temporally is necessary for effective intervention. Temporal variation in allele frequencies at eight microsatelhte loci was assessed by sampling local populations of G. palltdtpes. Samplings were carried out in 2000, 200 I, and 2003 in the Lambwe Valley and Nguruman areas in Kenya. Six polymorphic loci were scored. Allele frequencies were homogenous between seasons. Genetic differentiation was higher among dry season samples (F,, = 0.051, G" = 0.047) than wet season samples (F;r = 0.041, G" = 0.03 7). Differentiation between pooled dry season and pooled wet season samples did not differ (F,r = 0.008, G" = 0.004). Analysis of variance revealed no substantial genetic subdivision in seasons or years. It is concluded that G. pallidipes populations are more aggregated during the dry season, resulting in stronger measures of genetic differentiation when compared with wet seasons. However, season and time had no effect, indicating relative stability of G. pallidipes populations. Thus, strategies for suppression of G. pallidipes in the country should adopt measures that may not reduce effectiveness indifferent times of the year.
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This article is from East African Agricultural and Forestry Journal 77 (2010): 59. Posted with permission.