Effect of genotype on some reproductive parameters, body weight and phenotypic correlations of Japanese quail

Haitham Rajab Manhee Al-kaisi; Sohaib Mahmood Abd; Samawal sadi Abdullah Al-Tikriti

Authors

Haitham Rajab Manhee Al-kaisi of Animal Production, College of Agriculture, Tikrit University, Iraq Author
Sohaib Mahmood Abd Dep. of Animal Production, College of Agriculture, Tikrit University, Iraq Author
Samawal sadi Abdullah Al-Tikriti Dep. of Animal Production, College of Agriculture, Tikrit University, Iraq Author

Keywords:

Hybrid genotype,, Pure genotype,, Japanese quail,, Reproductive indicators,, Body weight.

Abstract

This study aimed to know the effect of pure and hybrid genotype and sex on some reproductive and productive traits in Japanese quail, which allows early selection. The hatching eggs were collected from three Japanese quail genotypes a pure genotype (♂ White × White ♀), a pure genotype (♂ Black × Black ♀) and a hybrid genotype (♂ Black × White ♀). The results of the study showed a significant superiority of the hybrid genotype (♂ Black × White ♀) over the pure genotype (♂ White × White ♀) and (♂ Black × Black ♀) in terms of hatching percentage of total eggs and body weight at the age of 7 days. Whereas, the hybrid genotype (♂ Black × White ♀) was superior to the pure genotype (♂ Black × Black ♀) in terms of hatching egg weight, fertility percentage, and body weight at the age of 1, 14, 21, 28, 35, and 42 days. As for the effect of sex, females outperformed males in the trait of body weight at the age of 35 and 42 days. As for the interaction between genotype and sex, the results showed a significant superiority of the females of the hybrid genotype (♂ Black × White ♀) and the pure genotype (♂ White × White ♀) in body weight at the age of 35 and 42 days. A positive and significant phenotypic correlation was found between the weight of the hatching eggs with the fertility rate and with the body weight at the age of 7 days, as well as between the body weight at the age of 1 day with the body weight at the age of 7 and 28 days. While a significant correlation was found between the body weight at the age of 7 with 28 days, while there was a positive and highly significant phenotypic correlation between the body weight at the age of 1 with 14 days and the body weight at the age of 14 with 21 days.