Egg specific gravity in improvement of hatchability in laying hens
Journal Title: Journal of Animal and Feed Sciences - Year 2011, Vol 20, Issue 1
Abstract
The aim of the study was to assess the suitability of egg specific gravity (ESG) as an accompanying trait in estimation of the birds’ breeding value for hatchability. The study involved 3 generations of performance recorded laying hens Rhode Island White (RIW) and Rhode Island Red (RIR). The breeding merit for number of chicks hatched from eggs laid (NCH) was estimated with three different model variants which differed with regard to the information accounted for: 1. all the standard information plus post factum hatchability record and ESG, 2. no post factum hatchability data on the last generation but ESG present, and 3. no hatchability data on last generation nor ESG. In both lines a high positive correlation between the egg specific gravity and hatchability was observed (0.47 to 0.66). In RIR, when ESG was included in the left-hand-side, a significantly higher concordance of birds’ NCH breeding value ranking between 2. and 1. than between 3. and 1. were observed.
Authors and Affiliations
I. Rozempolska-Rucińska, G. Zięba, M. Łukaszewicz, A. Witkowski, B. Ślaska
Keywords
Related Articles
- EP ID EP74710
- DOI -
- Views 138
- Downloads 0
Lysine efficiency in piglet fed diets with a phytogenic feed additive and conclusion of lysine requirement data
Two experiments were conducted to examine effects of a commercial phytogenic feed additive (PFA), containing inulin, an essential oil mix (carvacrol, thymol), and chest nut meal (polyphenols) on nutrient digestibility, p...
Effect of hen diet supplemented with 25-OH-D3 on the development of small intestinal morphology of chick
The effect of hen dietary 25-OH-D3 (added 3000 IU to control diet with 1000 IU) on the morphological changes of the small intestine of Ovambo chicks during prehatch and posthatch period was investigated. After 2 week fe...
Transfer of daidzein and genistein from feed into the egg yolk of hens
Soya isoflavones are compounds with phytoestrogenic characteristics, i.e. because of their structure, their effects are similar to those of animal estrogens. This is why they are used for medicinal purposes in aging wome...
The effects of choice feeding and season on the feeding behaviour and growth performance of calves
Two studies were performed to determine the effect of the selection of a diet from different feed ingredients offered on a free-choice basis and to determine the effect of the feeding method on the feeding behaviour and...
Factors affecting the nutritional value of pea (Pisum sativum) for broilers
In a trial carried out on broiler chickens, the nutritive value of five pea cultivars (coloured-flowered: Turnia, Sokolik, Milwa, and white-flowered Muza and Cysterski) was determined. A total of 60 male Ross 308 17-dayo...