Study on the Relationship Between Egg Production and Fertility in Broiler Breeder

육용종계의 산란능력과 수정율에 관한 연구

To secure a higher percentage of fertility in hatching eggs and a higher percentage of hatchability of the fertile eggs should be of direct benefit to poultry breeder ana hatchery operators. This study was carried out to estimate the relationships of egg production and fertility in broiler breeder. The data analysed were the record of pullets (5 strains) of broiler breeder raised at Poultry Breeding Farm, Seoul National Univ. from 1982 to 1983. Since the purpose of the study was only to find out the relationships between egg Production and fertility, many other factors thought to be included in fertility were fixed as much as possible. The results were summarized as follows. 1. Mean figure of egg production rate and fertility from 30 weeks age to 60 Weeks of age to 60 weeks of age were 60.5-65.2 percent and 82.7-87.9 percent. 2. Correlation coefficients between egg Production rate and fertility were high and positive, except line K, and the coefficients have highly significant differences. 3. Regression coefficients of fertility on egg Production rate were 0.54-0.97, except line K. 4. Maximum fertility age estimated from the polynomial regression equation were 44-47 weeks. The results obtained in this study suggested that the selection of high performance strain in egg Production should improve the fertility.

육용종계의 수정률을 향상시키기 위한 기초연구로서 산란능력과 수정율간의 상관관계를 분석하기 위하여 GPS 5계통을 가지고 실험한 결과 다음과 같은 성적을 얻었다. 1. 30주령에서 60주령까지의 평균산란율은 60.5-65.2%를 나타냈고 평균수정율과 평균란중은 각각 82.7-87.9%, 61.79-64.79$\ell$을 나타냈으며 산란율과 수정율은 일정한 주령에서 최대점을 나타내고 이후 감소하는 양상을 나타냈다.