GENETIC STUDIES ON LOCAL GOATS IN MANDYA DISTRICT OF KARNATAKA
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Date
2016-05
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KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR
Abstract
A study was undertaken on local goats in Mandya district of Karnataka for
various morphological characters, production and reproduction parameters, heritability of
body weight at different ages and to develop prediction equations for adult body weight.
Characteristic features of the goats were predominantly black colour of coat, eyelid,
muzzle and hooves, leafy structured and pendulous ears, straight forehead, absence of
beard and wattles and medium sized tail. Among horned goats 76.20 per cent had
straight horns with upward backward orientation. Overall least squares means for body
weight at three, six, nine, twelve month and adult goats were 9.41±0.12, 15.44±0.09,
19.46±0.09, 21.87±0.09 and 27.20±0.05 kg, respectively. Males were significantly
(P≤0.01) heavier than females in all age groups. Single born kids were heavier than twin
and triplet born kids. Effects of sex, type of birth and location/ centre on all body
measurements were significant. Overall mean age at first conception, age at first kidding,
kidding interval and service period in Mandya local goats were 398.94±3.31,
550.07±3.31, 276.00±2.17 and 125.47±0.93 days, respectively, and were significantly
affected by year, season and type of birth. Heritability estimates of body weight were
0.36±0.03, 0.29±0.02, 0.27±0.04 and 0.24±0.02 at three, six, nine and twelve months,
respectively. Body weight was positively and highly significantly correlated with all the
four body measurements viz., height at withers (0.80), body length (0.96), chest girth
(0.94) and paunch girth (0.94). Multiple regression analysis indicated that Height at
Withers (X1) in combination with Body Length (X2) and Chest Girth (X3) would
significantly improve accuracy of predictions.
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