TY - JOUR
T1 - Intra- and interspecific mitochondrial dna sequence variation within two species of rock-dwelling cichlids (teleostei
T2 - Cichlidae) from lake malawi, africa
AU - Bowers, Nancy
AU - Stauffer, Jr., Jay Richard
AU - Kocher, T. D.
PY - 1994/1/1
Y1 - 1994/1/1
N2 - Difficulties in interpreting the evolutionary significance of Lake Malawi cichlid morphologies led us to examine molecular techniques for resolving relationships among closely related species. Mitochondrial DNA (mtDNA) sequence variation in the first half of the control region (445 bp) was examined within and between two species of Melanochromis, a genus of rock-dwelling cichlids from Lake Malawi, Africa. The mean number of pairwise differences observed within Melanochromis auratus (Boulenger) and Melanochromis heterochromis Bowers and Stauffer mtDNA haplotypes was 2.0 (0.45%) and 5.0 (1.13%), respectively, and a mean of 4.9 (1.11%) pairwise differences between the two species was observed. Mean pairwise differences between Melanochromis species and Pseudotropheus zebra (Boulenger), another species of rock-dwelling cichlid and Tramitichromis cf. liturus, a sand-dwelling genus, were 11.2 (2.52%) and 21.9 (4.93%), respectively. Species divergence and radiation within the genus Melanochromis appears to have occurred rapidly and recently. Mitochondrial DNA sequence variation within this genus was sufficient for generating hypotheses concerning the evolutionary relationships within the genus and for examining generic-level relationships within and among the major cichlid lineages in Lake Malawi.
AB - Difficulties in interpreting the evolutionary significance of Lake Malawi cichlid morphologies led us to examine molecular techniques for resolving relationships among closely related species. Mitochondrial DNA (mtDNA) sequence variation in the first half of the control region (445 bp) was examined within and between two species of Melanochromis, a genus of rock-dwelling cichlids from Lake Malawi, Africa. The mean number of pairwise differences observed within Melanochromis auratus (Boulenger) and Melanochromis heterochromis Bowers and Stauffer mtDNA haplotypes was 2.0 (0.45%) and 5.0 (1.13%), respectively, and a mean of 4.9 (1.11%) pairwise differences between the two species was observed. Mean pairwise differences between Melanochromis species and Pseudotropheus zebra (Boulenger), another species of rock-dwelling cichlid and Tramitichromis cf. liturus, a sand-dwelling genus, were 11.2 (2.52%) and 21.9 (4.93%), respectively. Species divergence and radiation within the genus Melanochromis appears to have occurred rapidly and recently. Mitochondrial DNA sequence variation within this genus was sufficient for generating hypotheses concerning the evolutionary relationships within the genus and for examining generic-level relationships within and among the major cichlid lineages in Lake Malawi.
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U2 - 10.1006/mpev.1994.1009
DO - 10.1006/mpev.1994.1009
M3 - Article
C2 - 8025732
AN - SCOPUS:0028399698
SN - 1055-7903
VL - 3
SP - 75
EP - 82
JO - Molecular Phylogenetics and Evolution
JF - Molecular Phylogenetics and Evolution
IS - 1
ER -