TY - JOUR
T1 - Rates of protein, chromosome and morphological evolution in four genera of rhombomyine gerbils
AU - Qumsiyeh, Mazin B.
AU - Chesser, Ronald K.
N1 - Funding Information:
Acknowledgements--Wea re grateful to Drs Ahmad M. Disi, Sami Abdul Hafez, and Naim Ismail for their help in the field in Jordan. We also thank Dr. Duane Schlitterf or the specimens of Desmodillusa nd Tateraf rom southern Africa. The chromosomal part of this paper representsp artof a Ph.D. dissertation (by MBQ) at Texas Tech University,L ubbock.Thanks are due to R. J. Baker, C. S. Hood, J. K. Jones, Jr, R. D. Owen, and M. R. Willig for their commentsa nd suggestionsT. his projectw as funded by a Grant-in-aid of Research from the American Society of Mammalogists, The Museum of Texas Tech University, and NSF Grant DEB-83-00764 to Drs R. J. Baker and R. K. Chesser.
PY - 1988
Y1 - 1988
N2 - Electrophoretic, G- and C-band chromosomal, and morphological characters were examined in relation to evolutionary change for Desmodillus auricularis, Psammomys obesus, Sekeetamys calurus, Meriones shawi, and M. unguiculatus. Chromosomal evolution in these genera was complex and comparable to that found in the previously studied genera Tatera and Gerbillurus. Examination of 33 isoenzyme loci assayed by starch gel electrophoresis showed only three monomorphic loci and alternate allelic fixation occurring primarily at the generic level. Morphological, chromosomal, and electrophoretic data sets were found to be concordant in a cladistic arrangement of genera. However, the rates of fixation of electrophoretic and chromosomal characters in each lineage were not equal. The specialized morphology of Sekeetamys calurus coupled with extensive chromosomal rearrangements apparently has not been accompanied by a correlated rate of protein (genetic) evolution. The numbers of measured protein substitutions as judged by electrophoresis since divergence from a common ancestor for this and three other genera of gerbils were not significantly different from equality. This suggests that different parameters affect chromosomal and protein evolution in gerbils or the magnitude of effect varies for these parameters.
AB - Electrophoretic, G- and C-band chromosomal, and morphological characters were examined in relation to evolutionary change for Desmodillus auricularis, Psammomys obesus, Sekeetamys calurus, Meriones shawi, and M. unguiculatus. Chromosomal evolution in these genera was complex and comparable to that found in the previously studied genera Tatera and Gerbillurus. Examination of 33 isoenzyme loci assayed by starch gel electrophoresis showed only three monomorphic loci and alternate allelic fixation occurring primarily at the generic level. Morphological, chromosomal, and electrophoretic data sets were found to be concordant in a cladistic arrangement of genera. However, the rates of fixation of electrophoretic and chromosomal characters in each lineage were not equal. The specialized morphology of Sekeetamys calurus coupled with extensive chromosomal rearrangements apparently has not been accompanied by a correlated rate of protein (genetic) evolution. The numbers of measured protein substitutions as judged by electrophoresis since divergence from a common ancestor for this and three other genera of gerbils were not significantly different from equality. This suggests that different parameters affect chromosomal and protein evolution in gerbils or the magnitude of effect varies for these parameters.
KW - G-banded chromosomes
KW - Gerbillidae
KW - Rhombomyinae
KW - alloenzymes
KW - morphology
KW - phylogenetic relationships
KW - rates of evolutionary change
UR - http://www.scopus.com/inward/record.url?scp=38249029779&partnerID=8YFLogxK
U2 - 10.1016/0305-1978(88)90122-6
DO - 10.1016/0305-1978(88)90122-6
M3 - Article
AN - SCOPUS:38249029779
SN - 0305-1978
VL - 16
SP - 89
EP - 103
JO - Biochemical Systematics and Ecology
JF - Biochemical Systematics and Ecology
IS - 1
ER -