Abstract
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 (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. Frequencies of IGF-I genotypes (AA, AB, BB) were 17.3, 26.9, and 55.8%, respectively, within a population. When compared with the IGF-I genotypes, the AB genotype had the highest serum levels of estradiol and progesterone at 40 and 30 wk of age, respectively; the highest IGF-II concentration in F1 follicles at 60 wk; and was positively associated with the number of SYF at 60 wk. The results showed that the A allele was associated with a higher IGF-II expression in the follicles and stimulated the development of follicles, indicating a positive association of the A allele with egg production and the number of SYF. Therefore, these results suggest that there is a possibility of IGF-I genotypes acting as a genetic marker for egg productivity of KNOC.
| Original language | English |
|---|---|
| Pages (from-to) | 1203-1208 |
| Number of pages | 6 |
| Journal | Poultry Science |
| Volume | 83 |
| Issue number | 7 |
| Publication status | Published - 2004 Jul 1 |
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Keywords
- Egg productivity
- Insulin-like growth factor
- Insulin-like growth factor-I genotype
- Korean Native Ogol chicken
- Steroid hormone
ASJC Scopus subject areas
- Animal Science and Zoology
Cite this
Relationship between egg productivity and insulin-like growth factor-I genotypes in Korean Native Ogol chickens. / Kim, M. H.; Seo, D. S.; Ko, Yong.
In: Poultry Science, Vol. 83, No. 7, 01.07.2004, p. 1203-1208.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Relationship between egg productivity and insulin-like growth factor-I genotypes in Korean Native Ogol chickens
AU - Kim, M. H.
AU - Seo, D. S.
AU - Ko, Yong
PY - 2004/7/1
Y1 - 2004/7/1
N2 - 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 (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. Frequencies of IGF-I genotypes (AA, AB, BB) were 17.3, 26.9, and 55.8%, respectively, within a population. When compared with the IGF-I genotypes, the AB genotype had the highest serum levels of estradiol and progesterone at 40 and 30 wk of age, respectively; the highest IGF-II concentration in F1 follicles at 60 wk; and was positively associated with the number of SYF at 60 wk. The results showed that the A allele was associated with a higher IGF-II expression in the follicles and stimulated the development of follicles, indicating a positive association of the A allele with egg production and the number of SYF. Therefore, these results suggest that there is a possibility of IGF-I genotypes acting as a genetic marker for egg productivity of KNOC.
AB - 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 (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. Frequencies of IGF-I genotypes (AA, AB, BB) were 17.3, 26.9, and 55.8%, respectively, within a population. When compared with the IGF-I genotypes, the AB genotype had the highest serum levels of estradiol and progesterone at 40 and 30 wk of age, respectively; the highest IGF-II concentration in F1 follicles at 60 wk; and was positively associated with the number of SYF at 60 wk. The results showed that the A allele was associated with a higher IGF-II expression in the follicles and stimulated the development of follicles, indicating a positive association of the A allele with egg production and the number of SYF. Therefore, these results suggest that there is a possibility of IGF-I genotypes acting as a genetic marker for egg productivity of KNOC.
KW - Egg productivity
KW - Insulin-like growth factor
KW - Insulin-like growth factor-I genotype
KW - Korean Native Ogol chicken
KW - Steroid hormone
UR - http://www.scopus.com/inward/record.url?scp=4444225047&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=4444225047&partnerID=8YFLogxK
M3 - Article
C2 - 15285513
AN - SCOPUS:4444225047
VL - 83
SP - 1203
EP - 1208
JO - Poultry Science
JF - Poultry Science
SN - 0032-5791
IS - 7
ER -