Circulating IGF-I in plasma of growing male and female turkeys of medium and heavy weight lines

W. L. Bacon, K. E. Nestor, D. A. Emmerson, Regina Vasilatos-Younken, D. W. Long

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Plasma concentrations of insulin-like growth factor-I (IGF-I) were determined in male and female turkeys from a medium weight (RBC2) and a related heavy weight line (F) from 1 to 28 wks of age. At hatch, the concentrations of IGF-I were relatively low and not different between lines or sexes. During the neonatal period (1 to 7 wks), the concentrations of IGF-I increased and were higher in the faster growing F line and in males. During the juvenile period (8 to 15 wks) the concentrations of IGF-I were higher in males but not different between lines. During the preadolescent period (16 to 21 wks), the concentrations of IGF-I were higher in males but was not different between lines in males while the females of the RBC2 line had higher concentrations than females of the F line. During the adolescent period (22 to 28 wks) the concentrations of IGF-I were higher in males but was not different between lines in males while the females of the RBC2 line had higher concentrations than females of the F line. A phenotypic correlation (+.25) between plasma IGF-I and growth rate was present after statistical absorption of model effects during the neonatal period but not at the later ages. We conclude that IGF-I concentration was positively correlated with growth rate during the neonatal period, but that this relationship changed during the preadolescent and adolescent periods so that IGF-I concentrations were not related to growth rate in males but were negatively related to growth rate in females.

Original languageEnglish (US)
Pages (from-to)267-277
Number of pages11
JournalDomestic Animal Endocrinology
Volume10
Issue number4
DOIs
StatePublished - Jan 1 1993

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insulin-like growth factor I
Insulin-Like Growth Factor I
Weights and Measures
Growth
phenotypic correlation
Statistical Models
gender

All Science Journal Classification (ASJC) codes

  • Food Animals
  • Animal Science and Zoology
  • Endocrinology

Cite this

Bacon, W. L. ; Nestor, K. E. ; Emmerson, D. A. ; Vasilatos-Younken, Regina ; Long, D. W. / Circulating IGF-I in plasma of growing male and female turkeys of medium and heavy weight lines. In: Domestic Animal Endocrinology. 1993 ; Vol. 10, No. 4. pp. 267-277.
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Circulating IGF-I in plasma of growing male and female turkeys of medium and heavy weight lines. / Bacon, W. L.; Nestor, K. E.; Emmerson, D. A.; Vasilatos-Younken, Regina; Long, D. W.

In: Domestic Animal Endocrinology, Vol. 10, No. 4, 01.01.1993, p. 267-277.

Research output: Contribution to journalArticle

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T1 - Circulating IGF-I in plasma of growing male and female turkeys of medium and heavy weight lines

AU - Bacon, W. L.

AU - Nestor, K. E.

AU - Emmerson, D. A.

AU - Vasilatos-Younken, Regina

AU - Long, D. W.

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