ГЕНОТИП И ГИСТОСТРОЕНИЕ МЫШЕЧНОЙ ТКАНИ ПОДСВИНКОВ

Abstract

The paper presents research on the rib eye muscle histological structure in pure line and crossbred gilts; the measurements were ratio between muscular, connective, and adipose tissue, abundance of large, medium, and small size muscular fibers, as well as coverage of each fiber type. It was found out that muscular tissue content in the rib eye was the highest in 1/2КБ+1/2Й crosses, endomysium content was the highest in 1/2КБ+1/2Л crosses, adipose tissue was most abundant in 1/2КБ+1/2Д; interfacicular fat content was the highest in 1/2КБ+1/2Й; and intrafacicular fat was the highest in КБ. The best meat marbling was in КБ. Maximum content of large muscular fibers (33.2%) in the rib eye muscle was in 1/2КБ+1/2Д gilts; medium-size muscular fibers content was the highest (51.93%) in 1/2КБ+1/2Л; and small-size fibers were most abundant in 1/2КБ+1/2Й (28.96%). Large muscular fibers had larger coverage in 1/2КБ+1/2Д crosses; medium-size fibers had the largest coverage in 1/2КБ+1/2Л; and small-size fibers coverage was the same in all crosses. Average coverage of a single muscular fiber was smaller in КБ than in any of the crosses. Industrial crossing increases heterozygosis in structural elements of muscular tissue in crosses which most probably effects muscular mass and slaughter yield.