Chromosomal homoeologies in hamster species of the genusiPhodopus/i(Rodentia, Cricetinae)

摘要

The karyotypes of the two hamster species Phodopus sungorus and P. roborovska were analyzed with several banding techniques and compared. The homoeologies found between all chromosomes led to the proposal of the most likely common ancestral karyotype of these two species. The differences in the karyotypes were found to be a result of seven independent centric fusions, three inversions, and one possible telomeric fusion, as well as changes in the quantity and DNA-base pair composition of the constitutive heterochromatin.