Genetic Divergence Analysis of Gir Crossbred Cattle Based On Some Important Parameters

Abstract

The study was undertaken to estimate the genetic divergence using Mahalanobis D² statistics. Data were collected from 1972 to 2015 on FG (50% HF+50% Gir), IFG (FG Interse), FJG (50% HF+25% Jersey+25% Gir), IFJG (FJG Interse) and R (50% HF+12.50% Jersey+37.50% Gir) crosses of Gir on the basis of age at first conception, age at first calving, lactation milk yield, 300 days milk yield, lactation milk yield per day of lactation length. The genetic groups influence was significant (P<0.01) for all traits separately and simultaneously (V test) based on five traits. The Mahalanobis distance values among all the genetic groups combinations, were significant except IFG with R genetic group combination. The total D² values for AFCon, AFC, LMY, 300DMY and LMY/LL were 18.86, 0.07, 3.12, 6.42 and 0.78 respectively. The contribution of reproductive trait age at first conception was maximum as 64.47 per cent. The dendogram showed that there are two clusters; cluster one includes IFG, IFJG and R genetic groups and cluster two FG and FJG genetic groups. The magnitude of inter-cluster distance was greater than intra-cluster distance.