Robertsonian translocation have been well documented in domestic cattle, with 
the most commonly occurring fusion involving chromosomes 1 and 29. The 
widespread nature of this translocation is indicative of its ancient origin. 
Fifty Giemsa's stained metaphase spreads derived from lymphocyte cultures of the 
Thai gaur were analyzed for each animal. The Thai gaur had diploid chromosome 
number of 2n = 57 in male and 2n = 56 in female instead of the normal 2n = 58. 
The 2n = 57 in male chromosomes presence of an extra submetacentric chromosome 
and loss of two acrocentric chromosomes was observed [XY, 57, rob (1;29)]. The 
2n = 56 in female chromosomes presence of two extra submetacentric chromosomes 
and loss of four acrocentric chromosomes was observed [XX, 56, rob (1;29)]. 
Results from the Giemsa's stained analyses confirm that the two autosomes (2n = 
57) and four autosomes (2n = 56) involved in the translocation are the bovine 
homologues 1 and 29.