NDLI: Three genetically divergent lineages of the Oryx in eastern Africa: Evidence for an ancient introgressive hybridization

Content Provider	Springer Nature Link
Author	Masembe, Charles Muwanika, Vincent B. Nyakaana, Silvester Arctander, Peter Siegismund, Hans R.
Copyright Year	2006
Abstract	Phylogeographic and population genetic studies using sequence information are frequently used to infer species boundaries and history; and to assess hybridization and population level processes. In this study, partial mitochondrial DNA (mtDNA) control region (423 bp) and cytochrome b sequences (666 bp) of Oryx beisa sampled from five isolated localities in its entire current range in Africa were analyzed to investigate the extent of genetic variation and differentiation between populations. We observed high nucleotide diversity at the control region in the total sample (6.3%) but within populations, it varied considerably ranging from 1.6% to 8.1%. Population pairwise genetic differentiation was generally significantly high (ranging from F ST = 0.15, P<0.01 to F ST = 0.54, P<0.001). In the total sample, 29 and 12 haplotypes were observed in the control region and the cytochrome b data sets respectively. For both data sets, the haplotypes cluster into three distinct clades (sequence divergence ranged from 6.0%–12.9% to 0.8%–1.0% for the control region and cytochrome b sequences, respectively) that do not correspond to sampling locations. Two of these clades are found in the same localities (Samburu and Marsabit), which represent the O.beisa beisa subspecies, whereas the last clade represents the fringe-eared oryx (O. beisa callotis). We interpret these findings in terms of an ancient hybridization and introgression between two formerly isolated taxa of Oryx beisa.
Starting Page	551
Ending Page	562
Page Count	12
File Format	PDF
ISSN	15660621
Journal	Conservation Genetics
Volume Number	7
Issue Number	4
e-ISSN	15729737
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-03-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	introgressive hybridization mitochondrial DNA Oryx beisa population structure Animal Anatomy / Morphology / Histology Plant Sciences Evolutionary Biology Human Genetics
Content Type	Text
Resource Type	Article
Subject	Genetics Ecology, Evolution, Behavior and Systematics

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