The Egg Production Performance of Improved Horro Chicken Crossed with Koekoek and Kuroiler Breeds

Evaluation of cross-breeding effect on egg production traits of improved Horro chicken crossed with Koekoek and Kurioler chicken in direct and reciprocal mating was carried out for one generation at Debrezeit Agricultural Research Center. The experiment was done by mating foundation lines of improved Horro (H) and Koekoek(K) and Kurioler (Ku) chickens to obtain seven genotypes such as three pure lines (H), (K), (Ku) and their crosses (K×H, Ku×H, H×K, H×Ku). Day-old chicks from the seven genetic groups were randomly distributed between pens using a completely randomized design with three replications. The chickens were raised in a deep litter system for ۴۰ weeks of age during which data on feed intake, age at first egg (AFE), bodyweight at first egg (BWFE), egg laid, average egg weight, and mortality rate were recorded. The hen-day egg production (HDEP), hen-housed egg production (HHEP) and feed conversion rate (FCR) were calculated. The result showed that genotype had significant effect on most egg production traits studied. Older age at first egg was recorded in improved Horro (۱۵۶) followed by crossbred H×K (۱۵۰.۳۳) whereas the lowest number of days for AFE for was recorded for crossbred H×Ku (۱۵۳) followed by K×H (۱۳۶.۶۷) and Ku×H (۱۳۹.۳۳). In comparing crossbred, the heaviest bodyweight at first egg was registered for crossbred pullet H×Ku (۲۴۴۸ g) followed by Ku×H (۲۳۷۲.۳۳ g) whereas the lowest body weight was recorded for K×H (۱۷۲۶.۳۳ g) followed by H×K (۱۷۷۷.۷۸ g) crossbred pullet. In comparing all the genotypes, HxKu crossbred hen showed superior (P<۰.۰۵) performance in HHEP, HDEP, egg number except egg mass. However, egg weight was higher for Kuroiler, Ku×H, and H×K with comparable values but the lowest egg weight was registered for improved Horro chickens. Estimates of maternal effects (Me) were significantly (P< ۰.۰۵) positive only for age at first egg while additive (Ae) and heterotic effect (He) were non-significant with negative values. Positive and significant effect values were reported for bodyweight at first egg. From this study, it can be recommended that crossbred hens be sired by improved Horro (H x Ku) for egg production potential genotypes for the family poultry production system in the forthcoming synthetic breed development program.DOR: https://dorl.net/dor/۲۰.۱۰۰۱.۱.۲۳۴۵۴۳۷۷.۲۰۲۲.۱۰.۱.۵.۳Evaluation of cross-breeding effect on egg production traits of improved Horro chicken crossed with Koekoek and Kurioler chicken in direct and reciprocal mating was carried out for one generation at Debrezeit Agricultural Research Center. The experiment was done by mating foundation lines of improved Horro (H) and Koekoek(K) and Kurioler (Ku) chickens to obtain seven genotypes such as three pure lines (H), (K), (Ku) and their crosses (K×H, Ku×H, H×K, H×Ku). Day-old chicks from the seven genetic groups were randomly distributed between pens using a completely randomized design with three replications. The chickens were raised in a deep litter system for ۴۰ weeks of age during which data on feed intake, age at first egg (AFE), bodyweight at first egg (BWFE), egg laid, average egg weight, and mortality rate were recorded. The hen-day egg production (HDEP), hen-housed egg production (HHEP) and feed conversion rate (FCR) were calculated. The result showed that genotype had significant effect on most egg production traits studied. Older age at first egg was recorded in improved Horro (۱۵۶) followed by crossbred H×K (۱۵۰.۳۳) whereas the lowest number of days for AFE for was recorded for crossbred H×Ku (۱۵۳) followed by K×H (۱۳۶.۶۷) and Ku×H (۱۳۹.۳۳). In comparing crossbred, the heaviest bodyweight at first egg was registered for crossbred pullet H×Ku (۲۴۴۸ g) followed by Ku×H (۲۳۷۲.۳۳ g) whereas the lowest body weight was recorded for K×H (۱۷۲۶.۳۳ g) followed by H×K (۱۷۷۷.۷۸ g) crossbred pullet. In comparing all the genotypes, HxKu crossbred hen showed superior (P<۰.۰۵) performance in HHEP, HDEP, egg number except egg mass. However, egg weight was higher for Kuroiler, Ku×H, and H×K with comparable values but the lowest egg weight was registered for improved Horro chickens. Estimates of maternal effects (Me) were significantly (P< ۰.۰۵) positive only for age at first egg while additive (Ae) and heterotic effect (He) were non-significant with negative values. Positive and significant effect values were reported for bodyweight at first egg. From this study, it can be recommended that crossbred hens be sired by improved Horro (H x Ku) for egg production potential genotypes for the family poultry production system in the forthcoming synthetic breed development program. DOR: https://dorl.net/dor/۲۰.۱۰۰۱.۱.۲۳۴۵۴۳۷۷.۲۰۲۲.۱۰.۱.۵.۳

کلیدواژه ها:

Additive effect ، Crossbreeding ، Egg production ، Improv Horro ، Heterotic effect