The effects of feeding diets containing 20% (L) or 30% (H) neutral detergent fiber (NDF) (DM basis) on performance and carcass traits were studied in three breeds of pig, including pure Mong Cai (MC), crossbred Landrace×Yorkshire (LY) and crossbred MC×Yorkshire (F1). The experiment had a factorial design with two factors, breed and diet. Eighteen piglets of each breed (60±3 days) were randomly ...

A SNP in the promoter region of insulin like growth factor-1 (IGF1) (c.-512C>T) was analysed for associations with 10 fat deposition and carcass merit traits in hybrid (n = 455), Angus (n = 204) and Charolais (n = 186) beef cattle populations. Significant associations of the SNP were found for ultrasound backfat thickness (P = 0.030), carcass average backfat (P = 0.015) and carcass lean meat yi...

Growth performance, carcass characteristics, and meat quality of halothane carrier (Nn) and negative (NN) pigs grown from 40 kg live weight and slaughtered at three weights (110, 125, and 140 kg live weight) were studied. Daily gains were similar for the two genotypes (974 g for Nn and 964 g for NN), but Nn pigs had a higher gain:feed ratio than NN pigs (P < .01). Dressing percentage was higher...

Records for pigs included in an experiment on reciprocal recurrent selection conducted from 1956 through 1971 at the USDA Beltsville Agriculture Research Center were analyzed to obtain estimates of heritabilities and genetic correlations and to derive prediction equations for estimating weight of lean cuts (WTLC) and percentage of lean cuts of shrunk slaughter weight (LCPC). Lean cuts growth ra...

The objective of this research was to compare the quality of carcass and meat of selected pigs in Croatia. Investigation was carried out on 80 pigs, divided into three groups. Pigs from 1 and 2 groups were threeway crossbreeds between Large White and Swedish Landrace on the dam side and Pietrain (1 group) and German Landrace (2 group) on the sire side. 3 group was created from pigs crossbreed b...

The objective of this study was to evaluate carcass characteristics and meat quality surgically castrated immunocastrated male pigs. Data were collected from 24 pigs entire originating the commercial line (Agroceres x Topigs), receiving isonutritive diets housed in same experimental shed, slaughtered at 177 days old, with a slaughter weight 127.8 (± 6.5) 135.1 7.8) kg, respectively. Carcass suc...

To study the allometric growth of body and carcass traits, twelve new born Karadi lambs were docked within 3 days their birth using rubber-rings, left with mothers till weaning (2.5 months). Another 12 weaned obtained from local market intact. Following an adaptation period a week, intact average initial weight 16.83±1.522 19.92± 0.748kg, respectively randomly divided into three equal groups to...

Two experiments were conducted to determine the effect of substituting a more available dietary carbohydrate (CHO) for portions of corn or fat in the diet on growth performance, carcass traits, meat quality, and serum or plasma metabolites in growing-finishing pigs. A three-phase feeding program was used with corn-soybean meal diets formulated to provide 105% of the Lys requirement for barrows ...

The effect of ractopamine, a phenethanolamine beta-adrenergic agonist, on growth, nutrient utilization and carcass composition was studied in two lines of pigs that were fed high (24%) or low (12%) protein diets. Of the two lines of pigs that had been selected for seven generations for rapid lean growth when fed either the higher (HS line) or low (LS line) protein diet, the HS line tended to ex...

INTRODUCTION During the last decade the emphasis in animal production has switched from promoting maximum or near maximum growth to altering the efficiency and composition of growth, and the enhancement of lean tissue growth or protein accretion. These changes have been brought about by increasing consumer demand for leaner meat products, and the realization that at the same level of feed or en...