Genetic characterization of indigenous goats of sub-saharan africa using microsatellite DNA markers
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Date
2004
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Journal ISSN
Volume Title
Publisher
Asian-Australasian Journal of Animal Sciences
Abstract
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 5.26±0.464 (Djallonke) to 7.05±0.516 (Mubende) and from 0.542±0.036 (Pafuri) to 0.672±0.031 (Ndebele), respectively. The
between breeds variation evaluated using G ST and θ were found to account for 14.6% (θ) and 15.7% (G ST ) of the total genetic variation.
The D A 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. (Asian-Aust. J. Anim. Sci. 2004.
Vol 17, No. 4 : 445-452)
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Journal Article
Keywords
African Goats, Within- and Between-breed Genetic Variation, Relationships Among Breeds