Regional Genetic Structuring and Evolutionary History of the Impala Aepyceros melampus
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Regional Genetic Structuring and Evolutionary History of the Impala Aepyceros melampus. / Lorenzen, Eline Deirdre; Arctander, Peter; Siegismund, Hans Redlef.
In: Journal of Heredity, Vol. 97, No. 2, 2006, p. 119-132.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Regional Genetic Structuring and Evolutionary History of the Impala Aepyceros melampus
AU - Lorenzen, Eline Deirdre
AU - Arctander, Peter
AU - Siegismund, Hans Redlef
PY - 2006
Y1 - 2006
N2 - Samples of 162 impala antelope (Aepyceros melampus) from throughout its distribution range in sub-Saharan Africa were surveyed using eight polymorphic microsatellite loci. Furthermore, 155 previously published mitochondrial DNA (mtDNA) sequences from the same localities were reanalyzed. Two subspecies of impala are presently recognized-the isolated black-faced impala (Aepyceros melampus petersi) in southwest Africa and the common impala (Aepyceros melampus melampus) abundant in southern and east Africa. All tests performed indicated significant genetic differentiation at the subspecific level. Furthermore, individual-based analyses split the common impala subspecies into two distinct genetic groups, conforming with regional geographic affiliation to southern or east Africa. This was supported by assignment tests, genetic distance measures, pairwise values, and analysis of molecular variance. We suggest that the presence of such previously unknown regional structuring within the subspecies reflects a pattern of colonization from a formerly large panmictic population in southern Africa toward east Africa. This scenario was supported by a progressive decline in population diversity indices toward east Africa and a significant increase in the quantity /(1 - ). Both microsatellite and mtDNA data indicated a genetic distinctiveness of the Samburu population in Kenya.
AB - Samples of 162 impala antelope (Aepyceros melampus) from throughout its distribution range in sub-Saharan Africa were surveyed using eight polymorphic microsatellite loci. Furthermore, 155 previously published mitochondrial DNA (mtDNA) sequences from the same localities were reanalyzed. Two subspecies of impala are presently recognized-the isolated black-faced impala (Aepyceros melampus petersi) in southwest Africa and the common impala (Aepyceros melampus melampus) abundant in southern and east Africa. All tests performed indicated significant genetic differentiation at the subspecific level. Furthermore, individual-based analyses split the common impala subspecies into two distinct genetic groups, conforming with regional geographic affiliation to southern or east Africa. This was supported by assignment tests, genetic distance measures, pairwise values, and analysis of molecular variance. We suggest that the presence of such previously unknown regional structuring within the subspecies reflects a pattern of colonization from a formerly large panmictic population in southern Africa toward east Africa. This scenario was supported by a progressive decline in population diversity indices toward east Africa and a significant increase in the quantity /(1 - ). Both microsatellite and mtDNA data indicated a genetic distinctiveness of the Samburu population in Kenya.
U2 - 10.1093/jhered/esj012
DO - 10.1093/jhered/esj012
M3 - Journal article
C2 - 16407525
VL - 97
SP - 119
EP - 132
JO - Journal of Heredity
JF - Journal of Heredity
SN - 0022-1503
IS - 2
ER -
ID: 81110