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STUDY ON BODY MORPHOMETRIC MEASURMENTS AND THEIR APPLICATION IN PREDICTING LIVE BODY WEIGHT IN MARWARI GOATS UNDER FIELD CONDITION

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2017
Dr.G.C.GAHLOT
Rajasthan University of Veterinary and Animal Sciences, Bikaner
STUDY ON BODY MORPHOMETRIC MEASURMENTS AND THEIR APPLICATION IN PREDICTING LIVE BODY WEIGHT IN MARWARI GOATS UNDER FIELD CONDITION
M.V.Sc.

The data for the present investigation were analyzed from records of farmer’s flock of Marwari goat maintained under ICAR sponsored All India Co ordinate Research Project (AICRP) on goat improvement, Bikaner, Rajasthan for the period from 1990 to 2015. In this investigation observed body colours predominant black followed by an admixture of black, brown and white. In present study estimated that out of total animals 10 per cent of animals were having beard and 9.4 per cent animals having wattles. The average horn lengths at different ages were 1.04± 0.02 cm to 9.21± 0.06 cm. The average ear lengths at different ages were 5.71± 0.060 cm to 17.76± 0.07 cm. The overall least-squares means for body weights were observed to be 2.40 ± 0.06 to 33.73 ± 0.61 kg at different age. The effect of non genetic factors were estimated as highly significant (P≤ 0.01) on all ages group animals. The overall least-squares means for body measurements range were observed to be 36.85± 0.32 to 64.50 ± 0.71 cm for height, 30.19 ± 0.34 to 60.74± 0.67 cm for length and 36.59 ± 0.30 to 72.32 ± 0.77 cm for heart girth, at all age groups. The effect of cluster and effect of year of birth were found to be highly significant (P≤ 0.01) on all morphometric traits at birth, 3, 6, 9, 12, 18, 24 months and adult ages. Influence of season of birth was highly significant (P≤ 0.01) on body height at all age group.The effect of season of birth was highly significant (P≤ 0.01) on length and heart girth at 3, 6, 9, 12, 18, 24 months and adult ages. The sex of kid had highly significant (P≤ 0.01) effect on height at birth, 3, 6, 9, 18, 24, on length on birth, 3, 6, 9, 24 and adult ages, on heart girth at 3, 6, 9, 12 months. The phenotypic correlations of body weight with height 0.105 to 0.270, body weight with length 0.012 to 0.342 and body weights with heart girth at subsequent ages ranged from 0.047 to 0.466. Among the all body measurements heart girth had maximum correlation with body weight followed by height, length. The best fit regression equation at birth, 3 and 6 month; 9 month, 12 month, 18 month; 24 month and adult were obtained with heart girth, body height + body length; heart girth, heart girth+ length, heart girth; heart girth + length, respectively. In prediction of body weight also use correlation of body measurements and F-ratio in each group. Maximum value of R2 was obtained by combination of more than one estimate of body measurements.

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