Research Article

Association between DLK1 and IGF-I gene expression and meat quality in sheep

Published: December 04, 2014
Genet. Mol. Res. 13 (4) : 10308-10319 DOI: 10.4238/2014.December.4.26

Abstract

The aim of the present study was to detect delta-like 1 ho­molog (DLK1) and insulin-like growth factor-I (IGF-I) gene expression in the longissimus dorsi of Hu sheep at different growth stages and study the association between these genes and meat quality. The diameter and density of muscle fibers and tenderness of the longissimus dorsi were measured. Growth stage, but not sex, significantly affected DLK1 and IGF-I expression. DLK1 and IGF-I expression in the sheep longissimus dorsi gradually increased with growth, but also decreased during some periods. These results suggest that different growth stages significantly affect DLK1 and IGF-I gene expression in sheep muscle tissue. The ex­pression of DLK1 and IGF-I genes were positively and significantly (P IGF-I expression.

The aim of the present study was to detect delta-like 1 ho­molog (DLK1) and insulin-like growth factor-I (IGF-I) gene expression in the longissimus dorsi of Hu sheep at different growth stages and study the association between these genes and meat quality. The diameter and density of muscle fibers and tenderness of the longissimus dorsi were measured. Growth stage, but not sex, significantly affected DLK1 and IGF-I expression. DLK1 and IGF-I expression in the sheep longissimus dorsi gradually increased with growth, but also decreased during some periods. These results suggest that different growth stages significantly affect DLK1 and IGF-I gene expression in sheep muscle tissue. The ex­pression of DLK1 and IGF-I genes were positively and significantly (P IGF-I expression.