Genetic Evaluation of Production Performance of Jersey x Red Sindhi Crossbred Cows
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Date
2018-07
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Abstract
The present study was conducted on 355 Jersey x Red Sindhi
crossbred cows maintained over the period from 1985 to 2014 (30 years).
The data was analyzed for estimation of means and effect of non-genetic
factors. The overall least-squares means (± SE) of 180-day milk yield, 305-
day milk yield, lactation length, total lactation milk yield, peak yield, days
to attain peak yield, milk yield per day of lactation length (MYLL) and
milk yield per day of calving interval (MYCI) were 1027.43 ± 15.81 kg,
1595.59 ± 25.41 kg, 390.28 ± 6.77 days, 1928.58 ± 40.10 kg, 7.86 ± 0.12
kg, 34.77 ± 1.36 days, 4.67 ± 0.08 kg and 3.90 ± 0.10 kg, for the first
lactation and 1134.52 ± 11.92 kg, 1733.78 ± 17.90 kg, 373.50 ± 4.24 days,
2002.57 ± 28.06 kg, 8.68 ± 0.10 kg, 31.56 ± 0.80 days, 5.13 ± 0.05 kg and
4.21 ± 0.07 kg for pooled over lactations, respectively. Period of calving
had significant sources of variation for several traits. None of the other
traits considered were affected by age at first calving as an independent
covariate except total lactation milk yield. Parity was found to have
significant (P<0.05) or highly significant (P<0.01) influence on all the traits
studied except lactation length and days to attain peak yield.
Description
TNV_LRI_2018_6(3)56-60
Keywords
Veterinary Science