Associations between feed efficiency, body growth and serum insulin-like growth factor-1 level for Korean Native Ogol Chickens

W. K. Kim, M. H. Kim, D. S. Seo, C. Y. Lee, Y. O. Suk, Y. Ko

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Increasing of body weight has been one of the important economic factors in the poultry industry. Insulin-like growth factor (IGF)-I is a polypeptide that serves to regulate muscle development and body growth. Moreover, IGF-I is related to feed efficiency. However, there are few studies regarding the regulatory roles of chicken IGF-I/-II compared with that of mammals. Especially, the Korean Native Ogol Chicken (KNOC) has a lean body growth and its body weight is generally lighter than the broiler chicken. Therefore, this study was conducted to investigate associations among serum IGF-I/-II concentration, feed efficiency, and body growth in KNOC. The body weight and feed intake of KNOC were recorded from 20 to 36 weeks at 2 weeks intervals, and blood was taken every 2 weeks. Serum IGF-I/-II were measured by RIA. Chickens were divided into two groups, high and low serum IGF-I concentration. Generally, feed efficiency and growth performance (body weight and weight gain) in the high serum IGF-I group were higher than those of the low group during the experimental period. In particular, the body weight of the IGF-I high group were significantly different from those of the IGF-I low group at 34 and 36 weeks, respectively (p<0.05). Moreover, body weight, weight gain, and feed efficiency had a significant correlation with serum IGF-I at several weeks (p<0.05 and p<0.01). These results show that IGF-I plays an important role in body growth and suggests a possibility that serum IGF-I could be used as a selection marker for body growth in KNOC.

Original languageEnglish
Pages (from-to)532-537
Number of pages6
JournalAsian-Australasian Journal of Animal Sciences
Issue number4
Publication statusPublished - 2005 Apr


  • Body Growth
  • Feed Efficiency
  • IGF-I
  • IGF-II
  • Korean Native Ogol Chicken

ASJC Scopus subject areas

  • Food Science
  • Animal Science and Zoology


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