Journal of Food, Agriculture and Environment

MyHC fiber type composition in Rongchang and Landrace pigs of similar body weight

Author(s):

Fei-Yun Yang ^{1, 2}, Jin-Xiu Huang ^{1, 2, 3}, Xiao-Rong Zhou ^{1, 2, 3}, Yan-Chu Yao ^{1, 2, 3}, Shan Jiang ^{1, 2}, Yong Huan ¹, Jin-Long Yang ^{1, 2, 3}*, Zuo-Hua Liu ^{1, 2} *

Recieved Date: 2012-09-18, Accepted Date: 2013-01-08

Abstract:

Western and indigenous Chinese pig breeds show obvious differences in muscle growth and meat quality, however, the underlying molecular mechanism remains unclear. The main objective of this study was to evaluate the gene expression of muscle fiber type in local Rongchang and exotic Landrace pigs at the same body weight (10~110 kg). We compared differentially expressed muscle fiber types such as types I and 2a, type 2b, as well as type 2x fibers in longissimus dorsi of Rongchang and Landrace pigs using real-time reverse-transcription PCR. Results suggested that there are varieties and existence difference in developmental regularity of fiber types of longissimus muscle between Rongchang and Landrace pigs, and the fiber composition differences mainly manifest in 80 kg. Ratio of MyHC2b type fiber in Rong Chang was significantly lower than that of Landrace pig. These results may provide valuable information for understanding the molecular mechanism responsible for breed specific differences in growth performance and meat quality. 

Keywords:

Rongchang pig, meat quality, muscle fiber, Landrace pig

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 1
Category: Agriculture
Pages: 398-400

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