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R esearch
(Published online:
12-04-2015)
7.
Effect
of climatic variables on production and reproduction traits of
colored broiler breeder poultry
-
G. D.
Nayak, N. C. Behura, K. K. Sardar and P. K. Mishra
Veterinary World, 8(4): 472-477
doi:
10.14202/vetworld.2015.472-477
G. D. Nayak:
Department of Animal Breeding and
Genetics, College of Veterinary Science and Animal Husbandry,
Orissa University of Agriculture & Technology, Bhubaneswar - 751
003, Odisha, India;
drgdnayak@gmail.com
N. C. Behura:
Department of Poultry Science, College of
Veterinary Science and Animal Husbandry, Orissa University of
Agriculture & Technology, Bhubaneswar - 751 003, Odisha, India;
ncbehura@gmail.com
K. K. Sardar:
Department of Pharmacology & Toxicology,
College of Veterinary Science and Animal Husbandry, Orissa
University of Agriculture & Technology, Bhubaneswar - 751 003,
Odisha, India;
kksardar@gmail.com
P. K. Mishra:
Department of Poultry Science, College of Veterinary Science and
Animal Husbandry, Orissa University of Agriculture & Technology,
Bhubaneswar - 751 003, Odisha, India;
pkmishraouat@yahoo.in
Received: 18-11-2014, Revised: 23-02-2015, Accepted: 02-03-2015,
Published online: 12-04-2015
Corresponding author:
G. D.
Nayak, e-mail: drgdnayak@gmail.com
Citation:
Nayak
GD, Behura NC, Sardar KK, Mishra PK (2015) Effect of climatic
variables on production and reproduction traits of coloured
broiler breeder poultry, Veterinary World 8(4): 472-477.
Abstract
Aim: The present study was
conducted to investigate the important climatic variables
affecting production and reproduction in a broiler breeder flock.
Materials and Methods: The experiment was conducted for a
period of 1 year on colored synthetic female line male and female
poultry birds. 630 female progeny and 194 male progenies from 69
sires and 552 dams produced in four consecutive hatches at an
interval of 10 days were used for the present study. Each of the
seven, body weight and reproduction traits were regressed with
nine environmental variables. Initially, the data were subjected
to hatch effect and sire effect corrections through best linear
unbiased estimator (BLUE) method and, then, multiple linear
regressions of environmental variables on each trait were applied.
Result:
The overall regression was significant (p<0.01) in all traits
except 20 week age body weight of females. The R 2
value ranged from 0.12 to 0.90 for
the traits. Regression coefficient values (b values) for maximum
temperature and minimum temperature were significant (p<0.05) on 5th
week age body weight of
males. Similarly, evaporation and morning relative humidity (RH)
was significant (p<0.05) for 5th
week age body weight of
females. Almost all b values were significant (p<0.05) for egg
production up to 40 week age. The b values representing rainfall,
morning RH, afternoon RH, sunshine hours, and rainy days were
significant (p<0.05) on bodyweight at 20 week age. All
environmental variables except maximum temperature and minimum
temperature were significant (p<0.05) on body weight of females at
20 weeks of age. Age at sexual maturity was regressed
significantly (p<0.05) with evaporation, afternoon RH whereas, egg
shape index was regressed significantly (p<0.05) with a maximum
temperature, evaporation and afternoon RH.
Conclusion: The result indicated that various environmental
variables play a significant role in production and reproduction
of breeder broiler poultry. Controlling these variables in adverse
weathers may increase production.
Keywords: Best linear unbiased estimator, climatic variables,
colored breeder, multiple regressions, production, reproduction.
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