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Cytogenetic Screening of Breeding Herd of Malnad Gidda Cattle

Jayashree R,Rudresh B H,Sateesha G M,Sudarshan S Gadad,Vemula Harshini,Vijay Kumar B Shettar.


Breeding herd of Malnad Gidda cattle (12 No.s) from the Malnad Gidda Research and Information Centre, Veterinary College, Shimoga were screened for the chromosome profile through short-term lymphocyte culture method. Invitro lymphocyte proliferation method was standardized. The mitotic drive and mitotic index were 72.27 per cent, 23.34 per cent respectively. The diploid chromosome number was 60 with all of the autosomes (29 pairs) were acrocentric, while X- was sub-metacentric and Y was acrocentric. The mean relative length of autosomes ranged from 5.214 ± 0.061 to 2.230 ± 0.074, The X chromosome was the largest in the karyotype5.719 ± 0.177 while the Y chromosome was the smallest with a relative length of 1.060 ± 0.504. Among the animals screened no chromosomal abnormalities was observed. The present study also revealed that the chromosome architecture of Malnad Gidda cattle was similar to that of other indigenous breeds of cattle of India.

Key words: Arm ratio, Autosomes, Cattle, Chromosomes, Malnad Gidda

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