A molecular genetic study of Bulinus species in Lake Albert (Butiaba Parish)

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dc.contributor.author Nalugwa, Allen
dc.date.accessioned 2018-05-31T23:44:31Z
dc.date.available 2018-05-31T23:44:31Z
dc.date.issued 2003-12
dc.identifier.citation Nalugwa, A. (2003). A molecular genetic study of Bulinus species in Lake Albert (Butiaba Parish). Unpublished master’s thesis, Makerere University, Kampala, Uganda. en_US
dc.identifier.uri http://hdl.handle.net/10570/6276
dc.description Thesis submitted to the School of Graduate Studies in partial fulfillment for the award of the Degree of Master of Science in Environment and Natural Resources of Makerere University. en_US
dc.description.abstract In the interest of biodiversity as well as medicine, the precise knowledge of the identity of Bulinus snails in Lake Albert is needed since the snails are potential vectors of schistosomes that cause urinary schistosomiasis in man and his domestic stock. The high variability at the morphological level as well as the small size and similarities between bulinus species complicate the correct identification of these snails. Cytochrome Oxidase Subunit I mitochonfrial DNA (hereafter COI) nucleotide sequences of 105 individuals were used to examine the amount of genetic variation between two forms of Bulinus snails sampled from ten localities of the lake. Two genetically distinct lineages of Bulinus forskalii and Bulinus truncates/tropicus species were identified, with a sequence divergence of 12.6%. The two species are estimated to have diverged 3.2 – 6.3 million years ago. Analysis of molecular variance revealed that a large proportion of genetic variation (50%) was partitioned between populations rather than within populations. Nucleotide diversity in the total sample was 1.32% but varied within populations from 0.12% in a population sampled from Piida village to 2.09% in a population sampled from Bugoigo village. In all localities sampled, the Bulinus truncates/tropicus species were more abundant than the Bulinus forskalii species. These results were interpreted in light of self-fertilization and low dispersal ability among snails in both the Bulinus forskalii species and Bulinus truncates species. en_US
dc.description.sponsorship DANIDA (Danish International Development Assistance). en_US
dc.language.iso en en_US
dc.publisher Makerere University. en_US
dc.subject Bulinus population en_US
dc.subject Bulinus snails, Uganda en_US
dc.title A molecular genetic study of Bulinus species in Lake Albert (Butiaba Parish) en_US
dc.type Thesis/Dissertation (Masters) en_US

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