Genetic trends for growth and carcass traits in Large White, French Landrace and Belgian Landrace pig breeds
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چکیده
منابع مشابه
Genetic associations of prolificacy with performance, carcass, meat quality, and leg conformation traits in the Finnish Landrace and Large White pig populations.
The objective of this study was to estimate genetic associations of prolificacy traits with other traits under selection in the Finnish Landrace and Large White populations. The prolificacy traits evaluated were total number of piglets born, number of stillborn piglets, piglet mortality during suckling, age at first farrowing, and first farrowing interval. Genetic correlations were estimated wi...
متن کاملEstimation of genetic trends from 1977 to 2000 for stress-responsive systems in French Large White and Landrace pig populations using frozen semen.
An experimental design aiming at analysing the consequences of genetic selection from 1977 to 1998-2000 on the evolution of stress-responsive systems in the French Large White (LW) and Landrace (LR) pig populations was conducted by INRA and IFIP-Institut du Porc. Large White sows were inseminated with semen from LW boars born in 1977 (frozen semen) or in 1998 and their second-generation offspri...
متن کاملGenetic correlations of growth, backfat thickness and exterior with stayability in large white and landrace sows
Backfat thickness, daily gain, and five exterior traits were measured in 36 814 Large White and Landrace gilts from nucleus and multiplier herds. Functional stayability, defined as survived (1) or not (0), from first to second (STAY12) and from first to third litter (STAY123) was available for 13 760 of these animals in a commercial multiplier environment. Heritabilities and genetic correlation...
متن کاملTonsilla Paraepiglottica in the Bulgarian White × Landrace Pig Crosses - Morphological Traits and Some Morphometrical Investigations
The data about the topography and morphology of the paraepiglottic tonsil (tonsilla paraepiglottica; TPE) in pigs are not enough. The purpose of the present investigation was to determine its topography, morphological traits and some morphometric parameters in Bulgarian White × Landrace pig crosses. It was found that TPE was situated in pars laryngea pharyngis, dorsolaterally to vallecula epigl...
متن کاملGenetic parameters and trends for litter traits in U.S. Yorkshire, Duroc, Hampshire, and Landrace pigs.
Records on 251,296 Yorkshire, 75,262 Duroc, 83,338 Hampshire, and 53,234 Landrace litters born between 1984 and April of 1999 in herds on the National Swine Registry Swine Testing and Genetic Evaluation System were analyzed. Animal model and restricted maximum likelihood procedures were used to estimate variances of animal genetic (a), maternal genetic (m), permanent environmental, and service ...
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ژورنال
عنوان ژورنال: Annales de Zootechnie
سال: 1985
ISSN: 0003-424X
DOI: 10.1051/animres:19850315