Association among egg productivity, granulosa layer IGF-I, and ovarian IGF-I in Korean native ogol chicken

W. J. Kang, D. S. Seo, Yong Ko

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

There exists considerable evidence that insulin-like growth factor-I (IGF-I) is involved in the regulation of ovulation rate and follicle development. IGF-I is believed to modulate the effects of gonadotropins on follicular growth and cell differentiation via paracrine and autocrine mechanisms. Therefore, this study was performed to relate the expression of IGF-I on ovaries and follicles with egg productivity at 60 wk. The egg productivity of 70 KNOC was recorded from 20 to 60 wk. Blood was taken every 10 wk and ovaries and follicles were taken at 60 wk. Serum IGF-I and IGF-I of ovaries and follicles were measured by radioimmunoassay. Based on egg production levels up to 60 wk and ovarian IGF-I expression at 60 wk, respectively. Chickens were divided into two groups, high and low. Egg production and serum IGF-I in the high IGF-I group were higher than those in the low group. Moreover, the IGF-I expression of follicles in the high ovarian IGF-I expression group was higher than that in the low group. These finding are consistent with the report that IGF-I indirectly regulates ovulation in chickens, suggesting that this regulation may play an important role in improved egg productivity.

Original languageEnglish
Pages (from-to)325-330
Number of pages6
JournalAsian-Australasian Journal of Animal Sciences
Volume16
Issue number3
Publication statusPublished - 2003 Mar 1

Fingerprint

insulin-like growth factor I
Insulin-Like Growth Factor I
Ovum
Chickens
chickens
Ovary
Ovulation
blood serum
ovulation
egg production
gonadotropins
radioimmunoassays
Serum
Gonadotropins
cell differentiation
Radioimmunoassay
Cell Differentiation

Keywords

  • Egg productivity
  • Follicle
  • IGF-I
  • KNOC
  • Ovary

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this

Association among egg productivity, granulosa layer IGF-I, and ovarian IGF-I in Korean native ogol chicken. / Kang, W. J.; Seo, D. S.; Ko, Yong.

In: Asian-Australasian Journal of Animal Sciences, Vol. 16, No. 3, 01.03.2003, p. 325-330.

Research output: Contribution to journalArticle

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