太湖鹅与皖西白鹅腿肌GHR、IGF-I、IGF-IR和IGFBP-3 mRNA表达及其与屠宰性状相关性分析（英文）

目的]探讨IGFs系统对鹅骨骼肌生长的影响。方法]以太湖鹅和皖西白鹅为研究材料,采用荧光定量PCR方法研究鹅70日龄腿肌中GHR、IGF-I、IGF-IR和IGFBP-3 mRNA表达的品种、性别特异性,并与屠宰性能做相关性分析。结果]结果表明,鹅腿肌GHR、IGF-I、IGFIR和IGFBP-3 mRNA表达没有品种差异性,而体重和腿肌重品种差异显著。体重、腿肌重和腿肌率均无性别差异,除了太湖鹅腿肌IGF-I mRNA表达公鹅显著大于母鹅（P=0.032）,其他3个基因均无性别差异。检测的4个基因中仅IGFBP-3 mRNA表达和腿肌率呈极显著正相关,提示70日龄时IGFs系统可能通过IGFBP-3发挥对鹅腿肌生长的调节作用。结论]为鹅骨骼肌生长发育研究工作提供理论依据。

Expression of GHR,IGF-I,IGF-IR and IGFBP-3 Genes in Leg Muscles of Taihu Goose and Wanxi White Goose and Correlation between Their Expression and Carcass Traits

Objective] This study aimed to explore the effects of IGFs system on the growth of goose skeletal muscles. Method] Quantitative fluorescence PCR technique was adopted to study the variety- and gender-specificity in the expression of GHR, IGF-I, IGF-IR and IGFBP-3 genes in leg muscles of 70-day-old Taihu goose and Wanxi white goose, and the correlation between their expression and carcass traits was also investigated. Resull] There was no variety difference in the expression of GHR, IGF-t, IGF-IR and IGFBP-3 genes in leg muscles of Taihu goose and Wanxi white goose, but there were significant variety differences in the body weight and leg muscle weight. There were no gender difference in the body weight, leg muscle weight and the rate of leg muscles; except IGF-I mRNA level that was significantly higher in male Taihu goose than in female ones（P=0.032）, there was no gender dif- ference in the expression of other three genes. Among the four tested genes, only IGFBP-3 mRNA exhibited an extremely significantly positively correlation with the rate of leg muscles, suggesting that IGFs may play a role in regulating the growth of leg muscles via IGFBP-3 system in 70-day-old goose. Conclusion] This study provides theoretical basis for research in the skeletal growth and development.