Abstract
Three hundred and ten 12-week-old laying Japanese quails (Coturnixcoturnix japonica) from gray and white varieties (155 each) were randomly selected from the initial population and kept in individual battery cages. The measurements of growth and egg production were determined to derive residual feed intake (RFI). The relationship between RFI and egg quality, blood parameters, and carcass characteristics was also determined. The results indicated that the gray quails had significantly higher egg mass and lower broken eggs compared to the white quails. A significant increase of eggshell strength and shell percentage was found in eggs produced from gray quails compared to their white counterparts, although their shell thickness means weresimilar. The results of multiple regression analysis clearly identified a significant effect of metabolic body weight and egg mass for the computation of expected feed intake, rather than body weight gain, in both varieties of Japanese quails. A strong positive correlation between RFI and feed intake in both gray and white quail varieties was found. The same trend was also observed for feed conversion ratio (FCR). Therefore, including RFI in the selection criteria of Japanese quails in order to improve FCR under high environmental temperature is highly recommended.
Subject
General Veterinary,Animal Science and Zoology
Reference26 articles.
1. Genetic parameters for residual feed intake in a random population of Pekin duck
2. Genetic variability of residual feed consumption (RFC) and its relationships with some production traits and fear response in Japanese quail hens (Coturnixcoturnix japonica);Altan;Arch. Geflügelk.,2004
3. Prediction of feed intake and residual feed consumption in laying hen chickens;Badawe;Egypt. Poult. Sci.,2005
4. Response to selection for feed conversion ratio in Japanese quail
5. Genetic parameters for feed utilization traits in Japanese quail
Cited by
9 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献