Genetic Structure of Hartebeest Populations Straddling a Transition Zone Between Morphotypes Collins Ouma1, 2, Alfred L
ISSN 2090-424X J. Basic. Appl. Sci. Res., 1(3) 131-149, 2011 Journal of Basic and Applied Scientific Research © 2010, TextRoad Publication www.textroad.com Genetic Structure of Hartebeest Populations Straddling a Transition Zone between Morphotypes Collins Ouma1, 2, Alfred L. Roca3, Tom Were4, Evans O. Raballah5, Nicholas O. Oguge6, Walter G.Z.O. Jura7, Joel W. Ochieng8, Olivier Hanotte8, and Nicholas Georgiadis1 1Mpala Research Centre, P.O. Box 555, Nanyuki, Kenya 2Department of Biomedical Sciences and Technology, Maseno University, Private Bag, Maseno, Kenya 3Laboratory of Genomic Diversity, SAIC-Frederick, Inc., Frederick, MD 21702, USA 4Department of Pathology, Kenyatta University, P.O. Box 43844-00100 GPO, Nairobi, Kenya 5Department of Biochemistry and Biotechnology, Kenyatta University, P.O. Box 43844-00100 GPO, Nairobi, Kenya 6Earthwatch Institute Kenya, P.O. Box 10717-00100, Nairobi, Kenya 7Department of Zoology, Maseno University, Private Bag, Maseno, Kenya 8International Livestock Research Institute, P.O. Box 30709, Nairobi, Kenya Received 26 Jan., 2011 Accepted 3 Feb., 2011. ABSTRACT Variation in mitochondrial and microsatellite DNA was used to define the genetic structure of hartebeest populations straddling a transition zone between two morphotypes (Alcelaphus buselaphus cokei and A. b. lelwel) in Kenya. Previous analyses of mtDNA from hartebeest populations across Africa supported the refugium hypothesis; that present day hartebeest morphotypes diverged in allopatry, due to climatic changes. In this analysis of morphologically distinct populations in close geographical proximity, majority of genetic variation was found within populations, with relatively little distinction, and varying levels of subdivision, among populations. Patterns of shared alleles, and reduced tendency for mtDNA haplotypes to cluster phylogenetically according to morphotype, depicted gene flow between populations.
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