GENETIC VARIATION IN THE AFRICAN RODENT SUB-FAMILY OTOMYINAE (MURIDAE). IV: CHROMOSOME G-BANDING ANALYlS OF OTOMYS IRRORATUS AND O. ANGONIENSIS
In: Israel Journal of Ecology and EvolutionSearch for other papers by G. CONTRAFATTO in
Current site
Google Scholar
Search for other papers by J. MEESTER in
Current site
Google Scholar
Search for other papers by G. BRONNER in
Current site
Google Scholar
Search for other papers by P.J. TAYLOR in
Current site
Google Scholar
Search for other papers by K. WILIAN in
Current site
Google Scholar
Chromosome G-banding analysis was carried out on 30 specimens of Otomys irroratus from six South African localities and eight specimens of O. angoniensis from three localities. While O. angoniensis appeared chromosomally conservative, extensive variation was detected between populations of O. irroratus in the number of heterochromatic short arms. The results obtained were compared with those of our previous study. This species could be divided into three major cytotype groups: group A with mostly acrocentric chromosomes, group B with at least seven large autosomes carrying heterochromatic short arms, and group C in which only four pairs of large autosomes are biarmed. Within group A, three populations carried a tandem fusion between chromosomes 7 and 12, while another population displayed two pairs of unique supernumerary autosomes. The banding patterns of O. irroratus and O. angoniensis ciaomosomes were compared, and five homologous sequences were tentatively identified between the two species. Three types of heterochro-matin were detected in O. irroratus. Phylogenetic relationships between the various cytotypes and O. angoniensis are presented in the form of cladograms and these are compared with the results of phenetic analysis of the chromosomal data. Implications of these results for mechanisms of chromosomal speciation are discussed.
Purchase
Buy instant access (PDF download and unlimited online access):
Institutional Login
Log in with Open Athens, Shibboleth, or your institutional credentials
Personal login
Log in with your brill.com account
-
Contrafatto G., Meester J., Willan K., Taylor P.J., Robots M.A., Baker C.M.Genetic variation in the African rodent sub-family Otomyinae (Muridae). II: Chromosomal changes in some populations of Otomys irroratus 1991 59 293 299Cytogenetics and Cell Genetics
-
Denys C., Michaux J., Hendey B.An example of evolutionary parallelism? The Euryotomys-Otomys 1987 305 11 1389 1394case in tropical Africa (Mammalia, Rodentia). C.R. Acad. Sci. Paris
-
Matthey R.Analyse caryologique de cinq especes de Muridae africains (Mammalia, Rodentia) Mammalia 1964 28 403 118
-
Meester J.A.J., Rautenbach I.L., Dippenaar N.J., Baker C.M.Classification of Southern African mammals.Transvaal Museum Monograph No 1986 2505, p
-
Meester J.Chromosomal specialion in Southern African mammals South African Journal of Science 1988 84 721 724
-
Meester J., Taylor P.J., Contrafatto G.-C., Campbell G.K., Willan K., Lamb J.M., Pillay N.Chromosomal speciation in Southern African Otomynae (Rodentia; Muridae): a review Durban Mus. Novit 1992 17 58 63
-
Mezzanotte R., Ferrucci L., Vanni R., Bianchi U.Selective digestion of human metaphase chromosome by Alu I restriction endonuclease Journal of Histochemistry and Cytochemistry 1983a 31 553 556
-
Mezzanotte R., Bianchi U., Vanni R., Ferrucci L.Chromatin organization and restriction nuclease activity on human metaphase chromosomes Cytogenetics and Cell Genetics 1983b 36 562 566
-
Miller D.A., Choi Y-C., Miller O.J.Chromosome localization of highly repetitive DNA's and amplified ribosomal DNA with restriction enzymes Science 1983 219 395 397
-
Modi S.C-Banding analyses and the evolution of heterochromatin among arvicolid rodents Journal of Mammalogy 1987 8 3 704 714
-
Moritz C.The population biology of Gehyra (Gekkonidae): Chromosome changes and speciation Systematic Zoology 1986 35 1 46 67
-
Nei M.Estimation of average heterozygosity and genetic distance from a small number of individuals Genetics 1978 89 583 590
-
Pillay N.The breeding and reproductive biology of the vleir at Otomys irroratus. M.Sc. thesis, University of Natal, Durban, S. Africa 1990
-
Pillay N., Willan K., Meester J.Otomys irroratus (Muridae: Otomyinae)(In this volume) Post-zygotic reproductive isolation in the African vlei rat
-
Porter C.A., Sites J.W. Jr.Evolution of Sceloporus grammicus complex (Sauria: Iguanidae) in central Mexico: population cytogenetics Systematic Zoology 1986 35 3 334 358
-
Robinson T.J., Elder F.F.B.Extensive genome reorganizationin the African rodent genus Otomys Journal of Zoology 1987 211 735 745
-
Seabright M.A rapid banding technique for human chromosomes. Lancet ii: 1971 971 972
-
Skinner J.D., Smithers R.H.N.The mammals of Southern Africa., 2nd ed. University of Pretoria Pretoria 1990 235 244
-
Swofford D.L.PAUP: phylogenie analysis using parsimony. Illinois Natural History Survey, Version 2.4 1985
-
Swofford D.L., Selander R.BIOSIS-1. A computer program for the analysis of allelic variation in population genetics and biochemical systematics. David L. Swofford, Illinois Natural History Survey, Release 1.7 1989
-
Taylor P.J., Campbell G.K., Meester J., Willan K., van Dyk D.Genetic variation in the African rodent subfamily Otomyinae (Muridae) 1. Allozyme divergence among four species. South African Journal of Science 1989a 85 257 262
-
Taylor P.J., Campbell G.K., Meester J., Willan K., van Dyk D.Phenetic and phylogenetic analyses of 7 species of vlei rats (Rodentia: Muridae: Otomyinae) based on allozyme electrophoresis. Fifth International Theriological Congress, Rome (Abstract) 1989b
-
Taylor P.J., Campbell G.K., van Dyk D., Meester J., Willan K.Otomys irroratus (Muridae: Otomyinae)(in this volume). Genetic variation in the African vlei rat
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 147 | 46 | 11 |
| Full Text Views | 8 | 0 | 0 |
| PDF Views & Downloads | 6 | 0 | 0 |
GENETIC VARIATION IN THE AFRICAN RODENT SUB-FAMILY OTOMYINAE (MURIDAE). IV: CHROMOSOME G-BANDING ANALYlS OF OTOMYS IRRORATUS AND O. ANGONIENSIS
In: Israel Journal of Ecology and EvolutionSearch for other papers by G. CONTRAFATTO in
Current site
Google Scholar
PubMed
Search for other papers by J. MEESTER in
Current site
Google Scholar
PubMed
Search for other papers by G. BRONNER in
Current site
Google Scholar
PubMed
Search for other papers by P.J. TAYLOR in
Current site
Google Scholar
PubMed
Search for other papers by K. WILIAN in
Current site
Google Scholar
PubMed
Chromosome G-banding analysis was carried out on 30 specimens of Otomys irroratus from six South African localities and eight specimens of O. angoniensis from three localities. While O. angoniensis appeared chromosomally conservative, extensive variation was detected between populations of O. irroratus in the number of heterochromatic short arms. The results obtained were compared with those of our previous study. This species could be divided into three major cytotype groups: group A with mostly acrocentric chromosomes, group B with at least seven large autosomes carrying heterochromatic short arms, and group C in which only four pairs of large autosomes are biarmed. Within group A, three populations carried a tandem fusion between chromosomes 7 and 12, while another population displayed two pairs of unique supernumerary autosomes. The banding patterns of O. irroratus and O. angoniensis ciaomosomes were compared, and five homologous sequences were tentatively identified between the two species. Three types of heterochro-matin were detected in O. irroratus. Phylogenetic relationships between the various cytotypes and O. angoniensis are presented in the form of cladograms and these are compared with the results of phenetic analysis of the chromosomal data. Implications of these results for mechanisms of chromosomal speciation are discussed.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 147 | 46 | 11 |
| Full Text Views | 8 | 0 | 0 |
| PDF Views & Downloads | 6 | 0 | 0 |
