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Genetic evaluation of growth and production performance and short term selection response for egg mass in Gramapriya female line chicken

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Title Genetic evaluation of growth and production performance and short term selection response for egg mass in Gramapriya female line chicken
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Creator U RAJKUMAR*, M NIRANJAN, L L L PRINCE, C PASWAN, S HAUNSHI and B L N REDDY
 
Subject Body weight, Chicken, Egg production, Genetic evaluation, Gramapriya, Heritability, Selection response
 
Description Not Available
A comprehensive study was carried out in Gramapriya female line (PD-3) with respect to growth, production, selection response and population structure utilizing the data generated for the last seven generations at ICAR-Directorate of Poultry Research, Hyderabad, Telangana. The average fertility was 71.89 % and hatchability was 80.52 % on fertile egg set and 57.08% on total egg set. The least squares means (LSMs) for body weight at 4 and 6 weeks of age were 168.06±0.01 and 320.10±0.02 g, respectively. The heritability estimates from sire and dam components of variance were moderate to high for both body weights and shank length (0.27 to 0.35). The correlation coefficients (genetic and phenotypic) between body weights and shank length were positive and high in magnitude except with day old body weight. Age at sexual maturity (ASM) was 171.47±0.01days in PD-3 population. The part period egg production (EP 40) at 40 weeks of age was 75.60± 0.01eggs with an egg mass (EM 40) of 4157.19± 0.99 g. The h2 estimates for ASM, EW 40, EP 40 and EM 40 were 0.16±0.07, 0.42±0.11, 0.18±0.07 and 0.15±0.06, respectively, which were moderate to high in magnitude. The egg production at 40 weeks of age was negatively associated with ASM, body weights and egg weights at different ages. Egg mass had significant (P≤ 0.05) positive association with egg production and egg weight at 40 weeks of age. The selection intensity (i) and ranged from 0.32 to 0.85 while, rate of inbreeding ranged between 0.0031 and 0.0033 in PD-3 line. The direct selection response was 151.54 g on genetic scale and 79.75 (P
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Date 2021-03-25T05:07:48Z
2021-03-25T05:07:48Z
2020-03-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/46246
 
Language English
 
Relation Not Available;
 
Publisher ICAR