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Genetic analysis of growth and egg production traits in synthetic coloured broiler female line using animal model

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Title Genetic analysis of growth and egg production traits in synthetic coloured broiler female line using animal model
 
Creator L Leslie Leo Prince
K.S. Rajaravindra
U. Rajkumar
B.L.N. Reddy
C. Paswan
S. Haunshi
R.N. Chatterjee
 
Subject Animal model
Colored broiler
Genetic analysis
 
Description Variance and genetic parameters were estimated for growth and production traits of synthetic broiler female line (PB-2) using REML animal model to delineate the population status, direct additive, maternal genetic, permanent environmental effects, besides genetic trends and performance of economic traits. The overall least squares mean (LSM) for body weights at 0 day (BW0), at 2 weeks (BW2), at 4 weeks (BW4), at five weeks (BW5), shank length at 5 weeks (SL5) and breast angle at 5 weeks (BA5) of age were 40.03 g, 207.40 g, 589.58 g, 828.51 g, 76.89 cm and 80.78º, respectively. The overall LSM for egg production up to 40 weeks of age (EP40) and egg weight at 40 weeks (EW40) were 66.02 eggs and 58.23 g, respectively. The heritability estimates using the best model for BW0, BW2, BW4, BW5, SL5 and BA5 were 0.06±0.03, 0.19±0.03, 0.15±0.03, 0.14±0.02, 0.08±0.02 and 0.02±0.01, respectively. The heritability estimates were low to moderate in the magnitude for all early growth traits. The heritability estimate for egg production up to 40 weeks (EP40) was 0.30±0.05. The heritability estimates for adult body weights at 20 and 40 weeks of age (BW 20 and BW 40), age at sexual maturity (ASM) and egg weight at 40 weeks (EW40) were 0.21±0.04, 0.19±0.04, 0.16±0.03 and 0.33±0.05, respectively and the estimates were moderate to high in magnitude. Model 4 with additive, maternal permanent environmental, residual and phenotypic effects was the best model for growth traits except for BW0 and BA5. The average genetic gain observed in primary trait (BW5) over the five generations was 13.62 g per each generation indicating effective selection. The animal model minimized the over-estimation of genetic parameters and improved the accuracy of the BV, thus enabling the breeder to select the suitable breeding strategy for genetic improvement.
ICAR-DPR
 
Date 2020-07-13T05:05:41Z
2020-07-13T05:05:41Z
2020-07-02
 
Type Research Paper
 
Identifier L. Leslie Leo Prince, K.S. Rajaravindra, U. Rajkumar, B.L.N. Reddy, C. Paswan, S. Haunshi and R.N. Chatterjee (2020) Genetic analysis of growth and egg production traits in synthetic coloured broiler female line using animal model, Tropical Animal Health and Production, https://doi.org/10.1007/s11250-020-02340-4
https://doi.org/10.1007/s11250-020-02340-4
http://krishi.icar.gov.in/jspui/handle/123456789/38069
 
Language English
 
Publisher SPRINGER