Cytogenetic analysis of bactrian-dromedary crossbreed camels

摘要

Male Bactrian camels were crossbred with femaledromedaries and cytogenetic markers in 15 of their male offspring are described.Chromosomes were divided according to position of centromere comprising acrocentricautosomes 1-31, metacentric autosomes 33 and 34 and 2 autosomal sub metacentricchromosomes 35 and 36 and a pair of sex chromosomes. X chromosome was largemetacentric and Y chromosome small acrocentric. Mean length of longest chromosome was12.2μm and shortest 2.5μm. The diploid chromosome number for hybrids was 74 chromosomewith a karyotype of 32 acrocentric, 3 metacentric and 1 pair sub metacentric autosomes. Thesmall arms of acrocentric chromosomes were C-band positive and interstitial C-bands wereassociated with the centromere of the sub metacentric chromosomes.