

Articles
by
S.K. Misra 
Total Records (
1 ) for
S.K. Misra 





M.A. Ravichandran
,
M. Saminathan
,
A. Arun Prince Milton
,
K. Dhama
,
C. Suresh
,
K. Jeeva
and
S.K. Misra


Cytogenetic studies in domestic animals are gaining more importance because of their genetic implications to breeding programmes. The present study describes the chromosome profile and morphometric characteristics of Garole and Bonpala sheep and comparison of chromosomes between males, females and between breeds. The Karyotype revealed diploid chromosome number of 54 (2n) in both breeds and sexes. The first three pairs of autosomes were biarmed, submetacentric and remaining 23 pairs were acrocentric. The Xchromosome was acrocentric and largest and Ychromosome was the smallest, biarmed and metacentric. The morphometric analysis showed significant variation in mean relative length of 13th chromosome pair of Garole and Bonpala males and significant variation in the arm ratio of 2nd chromosome pair of females and variation also noticed in almost all the pairs of chromosomes but not up to the level of significance. The mean relative length of autosomes of Garole and Bonpala male ranged from 1.39±0.05 to 11.45±0.15 and 1.48±0.06 to 11.69±0.25 percentage, respectively. The mean relative length of Xchromosome of the males was 5.66±0.15 and 5.83±0.17, respectively while the Ychromosome length was 1.20±0.02 and 1.27±0.06, respectively. The mean relative length of autosomes of the females ranged from 1.43±0.06 to 10.80±0.20 and 1.42±0.04 to 11.42±0.36, respectively. The mean relative length of Xchromosome of Garole and Bonpala female was 5.51±0.13 and 5.61±0.15, respectively. The mean arm ratio of first 2 pairs of autosomes of Garole male was higher than Bonpala male while the 3rd pair was higher in Bonpala males. The mean arm ratio of first 3 pairs of autosomes of Garole female was higher than Bonpala female. The present study for the first time compares the cytogenetic profile between Garole and Bonpala sheep breeds. 





