Relationship Between Egg Productivity and Insulin-Like Growth Factor-I Genotypes in Korean Native Ogol Chickens

M. H. Kim, D. S. Seo, Y. Ko
2004 Poultry Science  
Endocrine factors, such as steroid hormones and growth factors, regulate egg productivity in terms of the quantity of egg production, egg weight, sexual maturity, and the number of small yellow follicles (SYF). Insulin-like growth factors (IGF) are involved in the regulation of ovulation rate and ovarian follicular development in chickens, and a relationship between IGF-I genotype and egg weight has been reported. However, the effect of IGF on egg productivity in Korean Native Ogol chickens
more » ... e Ogol chickens (KNOC) has been little studied. Therefore, this study was conducted to identify the relationship among endocrine factors (IGF-I, IGF-II, estradiol, and progesterone), IGF-I genotypes, and egg productivity. Fre-(Key words: egg productivity, insulin-like growth factor, insulin-like growth factor-I genotype, steroid hormone, Korean Native Ogol chicken) 2004 Poultry Science 83:1203-1208 Abbreviation Key: E 2 = 17β-estradiol; F1 = first follicle; F2 = second follicle; F3 = third follicle; IGF = insulin-like growth factor; KNOC = Korean Native Ogol chicken; P 4 = progesterone; SYF = small yellow follicle.
doi:10.1093/ps/83.7.1203 pmid:15285513 fatcat:5zh2ddn7vvcpvgvobnmhynqnuu