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The Journal of Heredity 2001:92(3)
© 2001 The American Genetic Association 92:221-225

Current Status of the River Buffalo (Bubalus bubalis L.) Gene Map

S. M. El Nahas, H. A. de Hondt, and J. E. Womack

From the Department of Cell Biology, National Research Center, Cairo, Egypt (El Nahas and de Hondt) and Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas A&M University, Hwy. 60, College Station, TX 77843 (Womack).

Address correspondence to J. E. Womack at the address above or e-mail: jwomack{at}cvm.tamu.edu.

Ninety-nine loci have been assigned to river buffalo chromosomes, 67 of which are coding genes and 32 of which are anonymous DNA segments (microsatellites). Sixty-seven assignments were based on cosegregation of cellular markers in somatic cell hybrids (synteny), whereas 39 were based on in situ hybridization of fixed metaphase chromosomes with labeled DNA probes. Seven loci were assigned by both methods. Of the 67 assignments in somatic cell hybrids, 38 were based on polymerase chain reaction (PCR), 11 on isozyme electrophoresis, 10 on restriction endonuclease digestion of DNA, 4 on immunofluorescence, and 4 on chromosomal identification. A genetic marker or syntenic group has been assigned to each arm of the five submetacentric buffalo chromosomes as well as to the 19 acrocentric autosomes, and the X and Y chromosomes. These same markers map to the 29 cattle autosomes and the X and Y chromosomes, and without exception, cattle markers map to the buffalo chromosome or chromosomal region predicted from chromosome banding similarity.


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