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Genetic Characterization of Indigenous Goats of Sub-saharan Africa Using Microsatellite DNA Markers
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Genetic Characterization of Indigenous Goats of Sub-saharan Africa Using Microsatellite DNA Markers
Chenyambuga, S.W.; Hanotte, O.; Hirbo, J.; Watts, P.C.; Kemp, S.J.; Kifaro, G.C.; Gwakisa, P.S.; Petersen, P.H.; Rege, J.E.O.;
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Genetic diversity of sub-Saharan African goats was assessed using 19 microsatellite markers. Breeds were sampled from eastern Africa (Maasai, Kigezi, Mubende, North West Highland, Arsi-Bale), southern Africa (Ndebele, Pafuri) and West Africa (West African Dwarf, Maure, Djallonke). European breeds (Grisons Striped, Toggenburg), Asian breeds (Mongolian Cashmere, Bandipur) and a Middle East breed (Arab) were also included. The mean number of alleles per locus and average gene diversity ranged from 5.260.464 (Djallonke) to 7.050.516 (Mubende) and from 0.5420.036 (Pafuri) to 0.6720.031 (Ndebele), respectively. The between breeds variation evaluated using $$ and were found to account for 14.6% () and 15.7% ($$) of the total genetic variation. The measure of genetic distance between pairs of breeds indicated that the largest genetic distance was between Pafuri and Djallonke while the lowest genetic distance was between Arsi-Bale and North West Highland. A neighbour-joining tree of breed relationships revealed that the breeds were grouped according to their geographic origins. Principal component analysis supported the grouping of the breeds according to their geographic origins. It was concluded that the relationships of sub-Saharan African goat breeds were according to their geographical locations implying that the goats of eastern Africa, West Africa and southern Africa are genetically distinct. Within each sub-region, goat populations could be differentiated according to morphological characteristics.
African Goats;Within- and Between-breed Genetic Variation;Relationships Among Breeds;
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