TAILIEUCHUNG - Báo cáo sinh học: "Growth, carcass and meat quality performance of crossbred pigs with graded proportions"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Growth, carcass and meat quality performance of crossbred pigs with graded proportions | Genet Sei Evol 1993 25 83-99 Elsevier INRA 83 Original article Growth carcass and meat quality performance of crossbred pigs with graded proportions of Meishan genes JP Bidanel1 JC Caritez2 J Gruand3 c Legault1 1 INRA Station de Génétique Quantitative et Appliquée Centre de Recherches de Jouy-en-Josas 78352 Jouy-en-Josas Cedex 2 INRA Domaine Experimental du Magneraud 17700 Surgères INRA Station Experimentale de Selection Porcine 86480 Rouillé France Received 3 December 1991 accepted 18 September 1992 Summary - Growth carcass and meat quality traits were measured in 2 different experimental herds on male and female pigs produced from matings between Piétrain boars and 12 genetic types of sows with graded proportions of Large White LW and Meishan MS genes. Growth records from 30-100 kg liveweight were obtained on ad libitum feeding on a total of 1 640 pigs among which 1 200 were submitted to carcass evaluation and meat quality measurements. Genetic type mean performance essentially varied according to the relative proportions of MS and LW genes in the dam and could hence be characterized by a single parameter difference in crossbreeding XfS-Llv which measures the difference between MS and LW breeds used as dam breeds. Differences in crossbreeding were unfavourable to MS for all growth and carcass traits. Average estimates of I MS-LW were -71 16 g d for average daily gain ADG feed conversion ratio killing out percentage and estimated carcass lean content M respectively. However significant herd differences were observed for ADG and M. The 2 herd estimates were 51 16 g d and 92 30 g d for ADG and for M. Conversely differences in crossbreeding for meat quality traits were in favour of MS with an advantage of point in meat quality index over LW ie one third of a phenotypic standard deviation. pig crossbreeding Chinese breed growth carcass meat quality Resume Performances de croissance de carcasse et de qualité de la .

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