Genetic Evaluation of Egg Production and Egg Quality Attributes in Japanese Quails through Partial Periods

Abstract

Background: Egg production efficiency is typically measured through age and body weight at sexual maturity, egg number and egg weight during certain production periods. Increased egg weight and number of eggs are the primary purpose of the laying bird breeding programmes. Partial period analysis enhances selection process as the variations occurring throughout the bird’s productive life are identified and helps in the selection decisions. The current study aimed to study the genetic parameters such as heritability, phenotypic and genetic correlations to improve egg production performance and egg quality traits in Japanese quail reared at the Central Avian Research Institute (CARI).Methods: In present investigation, data recording was carried out from the Japanese quail population at experimental quail farm, CARI during 2019-2020. The individual mating was conducted between 180 sires and 180 dams of three varieties of Japanese quails were randomly selected from the base populations to develop first generation of experimental population. The hatched chicks were wing banded and the pedigree details recorded. For economic traits such as egg production and egg quality estimation, 40 sires and 40 dams were selected and parameters were evaluated. Result: In this present investigation, egg number from 10-16th week of age exhibited moderate to high heritable values. Egg weight was estimated moderate heritability traits. In egg quality traits, all values were moderate to high heritable values except yolk density in all the three varieties.

Genetic Improvement of Egg Production and Associated Traits in Egg Type Japanese Quail

“…The egg quality parameters such as egg weight, shape index, specific gravity, albumen index, yolk index, Haugh unit score, yolk colour, shell thickness and shell percentage values presented in Table 6 were comparable with that of previous studies (Kumari et al (2016); Subhashini et al (2018 b); Monika et al (2020) in different strains of Japanese quails.…”

Estimation of genetic parameters for egg production traits in Japanese quail that selected for immune responses and fed different level of dietary L-arginine

“…[17] showed that the genetic and phenotypic correlation between the characteristic of the number of eggs produced and the characteristic of egg weight was negatively correlated (-0.22, -0.18) in three chicken breeds (Penedesenca Negre, Prat Lleonada, Empordanesa Roja), and estimates of the heritability for the egg production were 0.20, 0.31, and 0.33 respectively. While in a study by the researcher [18] in which the Japanese quail was used, the phenotypic correlations for the characteristic of egg production between the productive periods were all positive and ranged between the three productive lines between (0.173 -0.614, 0.110 -0.465, 0.015 -0.371), respectively.…”

​Chip Detection of Rabbit Peripheral Blood Mononuclear Cells and 293T Cells Induced by Chicken Egg White Extract Shows Significant Differences in the Signaling Pathways that Regulate the Pluripotency of Stem Cells

“…Compared with pig egg extract and toad egg extract, chicken egg white extract is more convenient to obtain, the amount obtained is greater and the extraction process should be sterile (Monika 2021). This extract can be directly used for cell culture without filtration and sterilization and has greater application value (Lyayla 2021).…”