Sokoine University of Agriculture

Assessment of genetic variation among four populations of Small East African goats using microsatellite markers

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dc.contributor.author Nguluma, A. S.
dc.contributor.author Zhao, Y.
dc.contributor.author Huang, Y.
dc.contributor.author Chen, L.
dc.contributor.author Msalya, G.
dc.contributor.author Lyimo, C.
dc.contributor.author Guangxin, E.
dc.contributor.author Chenyambuga, S. W.
dc.date.accessioned 2021-06-07T17:33:20Z
dc.date.available 2021-06-07T17:33:20Z
dc.date.issued 2017
dc.identifier.issn 0375-1589
dc.identifier.uri http://www.suaire.sua.ac.tz/handle/123456789/3596
dc.description Article en_US
dc.description.abstract The majority of goats in Tanzania belong to the Small East African (SEA) breed, which exhibits large phenotypic variation. This study aimed to determine the genetic structure of, and relationships among four populations (Sukuma, Gogo, Sonjo, and Pare) of the SEA breed that have not been studied adequately. A total of 120 individuals (24 from each population) were analysed at eight microsatellite loci. In addition, 24 goats of the South African Boer breed were used as reference. Observed heterozygosity (Ho) ranged from 0.583 ± 0.04 for Sukuma to 0.659 ± 0.030 for Gogo, while expected heterozygosity (He) ranged from 0.632 ± 0.16 for Sukuma to 0.716 ± 0.16 for Boer. Five loci deviated from Hardy–Weinberg equilibrium (HWE) across populations. The mean number of alleles ranged from 4.75 ± 1.58 for Pare to 6.88 ± 3.00 for Sukuma. The mean inbreeding coefficient (F IS ) ranged from 0.003 in Sonjo to 0.148 in Sukuma. The differentiation coefficient (F ST ) was highest (0.085) between Boer and Sukuma and lowest (0.008) between Gogo and Sonjo. The largest genetic distance (0.456) was found between Sukuma and Boer, while the smallest (0.031) was between Gogo and Sonjo populations. Pare, Gogo, and Sonjo populations, formed one cluster, while Sukuma and Boer populations formed two separate clusters. From the findings, it can be concluded that the SEA goats in this study showed high in population genetic variation, which implies that there is good scope for their further improvement through selection within populations. The Sukuma population, which has fairly high inbreeding, is moderately differentiated from Pare, Sonjo, and Gogo goat populations, which showed a high level of admixture. Conservation and improvement strategies of the goats should be designed with first priority being on Sukuma goats. ____________________________________________________________________________________ en_US
dc.description.sponsorship South African Journal of Animal Science en_US
dc.language.iso en en_US
dc.publisher South African Society for Animal Science en_US
dc.subject Conservation en_US
dc.subject genetic diversity en_US
dc.subject genetic markers en_US
dc.subject local genetic resources en_US
dc.title Assessment of genetic variation among four populations of Small East African goats using microsatellite markers en_US
dc.type Article en_US
dc.url http://www.sasas.co.za en_US


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