Delineating maternal influence in regulation of variance in major economic traits of White Leghorns: Bayesian insights

Proper variance partitioning and estimation of genetic parameters at appropriate time interval is crucial for understanding the dynamics of trait variance and genetic correlations and for deciding the future breeding strategy of the population. This study was conducted on the same premise to estimat...

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Bibliographic Details
Published in:PloS one 2024-07, Vol.19 (7), p.e0307987
Main Authors: Kour, Aneet, Chatterjee, R N, Rajaravindra, K S, Prince, L Leslie Leo, Haunshi, Santosh, Niranjan, M, Reddy, B L N, Rajkumar, U
Format: Article
Language:English
Subjects:
Accuracy
Age
Analysis
Bayesian analysis
Birds
Birth weight
Body weight
Correlation
Disease
Economic aspects
Economic models
Egg industry
Egg production
Environmental effects
Estimates
Females
Genetic diversity
Heritability
Maternal effects
Mathematical models
Parameter estimation
Parameter identification
Population genetics
Population studies
Poultry
Proteins
Sexual maturity
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Summary:Proper variance partitioning and estimation of genetic parameters at appropriate time interval is crucial for understanding the dynamics of trait variance and genetic correlations and for deciding the future breeding strategy of the population. This study was conducted on the same premise to estimate genetic parameters of major economic traits in a White Leghorn strain IWH using Bayesian approach and to identify the role of maternal effects in the regulation of trait variance. Three different models incorporating the direct additive effect (Model 1), direct additive and maternal genetic effect (Model 2) and direct additive, maternal genetic and maternal permanent environmental effects (Model 3) were tried to estimate the genetic parameters for body weight traits (birth weight, body weight at 16, 20, 40 and 52 weeks), Age at sexual maturity (ASM), egg production traits (egg production up to 24, 28, 40, 52, 64 and 72 weeks) and egg weight traits (egg weight at 28, 40 and 52 weeks). Model 2 and Model 3 with maternal effects were found to be the best having the highest accuracy for almost all the traits. The direct additive genetic heritability was moderate for ASM, moderate to high for body weight traits and egg weight traits and low to moderate for egg production traits. Though the maternal heritability (h2mat) and permanent environmental effect (c2mpe) was low (
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0307987