author(s)
V Harshini, K Sakunthala Devi, B Punya Kumara and Jeevan C

abstract
A karyotype analysis was carried out on 30 indigenous (15 of each gender) and 30 Large White Yorkshire crossbred (15 of each gender) pigs for the karyological study by adopting the short term peripheral blood leukocyte culture technique. There was significant difference between animals in relative length of all chromosomes in Large White Yorkshire crossbred females except for chromosome numbers 2^nd, 3^rd, 6^th, 14^th and 17^th and in males except for chromosome numbers 2^nd, 3^rd, 7^th, 12^th, 17^th and 18^th respectively, whereas in indigenous pig females except for chromosome numbers 10^th, 12^th, 13^th, 14^th and 17^th and in males except for chromosome numbers 3^rd, 12^th, 17^th and 18^th correspondingly. The significant difference between animals in relative length of indigenous pigs might be resulting from disassortative mating followed by the farmers, which is reflected in significant differences in relative length of some of the autosomes, whereas in crossbred pigs despite the selection was possibly due to differences in condensation rate of chromosomes and bending up or down of arms during chromosomal preparation which can only viewed into dimensions.