TAILIEUCHUNG - Báo cáo khoa hoc:" Selection for reduced muscle glycolytic potential in Large White pigs. I. Direct responses"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học thế giới đề tài: Selection for reduced muscle glycolytic potential in Large White pigs. I. Direct responses | 469 Genet. Sei. Evol. 30 1998 469-480 Inra Elsevier Paris Original article Selection for reduced muscle glycolytic potential in Large White pigs. I. Direct responses Pascale Le Roya Catherine Larzula Jean Goguéb André Talmantc Gabriel Moninc Pierre Selliera a Station de génétique quantitative et appliquée Institut national de la recherche agronomique 78352 Jouy-en-Josas cedex France b Institut national de la recherche agronomique domaine de Galle 18520 Avord France c Station de recherches sur la viande Institut national de la recherche agronomique Theix 63122 Saint-Genềs-Champanelle France Received 3 March 1998 accepted 10 September 1998 Abstract - A six-generation selection experiment comprising a selected S and a control C line has been conducted with the objective of decreasing muscle glycolytic potential in purebred French Large White pigs. Both lines consisted of six to eight sires and about 40 dams per generation and each dam produced two litters. The selection criterion in the line s was the in vivo glycolytic potential IVGP of the longissimus Id muscle measured on a shot-biopsy sample removed at 75 kg live weight on boars and gilts from first-parity litters. In addition the post mortem glycolytic potential PMGP of Id semimembranosus sm and semispinalis capitis sc muscles was recorded on pigs from second-parity litters slaughtered at 100 kg live weight. Throughout the experiment 2 981 and 454 animals were recorded for IVGP and PMGP respectively. A consistent decrease in IVGP and to a lesser extent in PMGP was obtained in the line s compared with the line c. Estimates of genetic changes per generation were and SD units of the trait for IVGP and PMGP of Id sm and sc muscles respectively. The REML heritability estimates were and for the above four traits respectively. The REML estimate of genetic correlation of IVGP with PMGP Id was somewhat higher than those of IVGP with PMGP of sm and sc .

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