Báo cáo sinh học: "Estimation of crossbreeding parameters between Large White and Meishan porcine breeds I Reproductive performance" docx

... additive and non-additive variability of individual piglet weight, which will be analysed in the next article of this series. The analysis of litter and sow weights and ... size. CONCLUSION The first estimation of crossbreeding parameters for Large White and Meishan is of great interest for studying strategies of economic use in c...

Ngày tải lên: 14/08/2014, 20:20

... parameters between Large White and Meishan porcine breeds. III. Dominance and epistatic components of heterosis on reproductive traits JP Bidanel INRA, Station de G6n6tique Quantitative et ... expression of recombination loss in quantitative traits. Z Tierziichtg Ziichtgsbiol 97, 138-143 Kinghorn B (1982) Genetic effects in crossbreeding. I....

Ngày tải lên: 14/08/2014, 19:22

... g/d Original article Estimation of crossbreeding parameters between Large White and Meishan porcine breeds. II. Growth before weaning and growth of females during the growing and ... Estimates of additive genetic, maternal and specific combining abilitites for some litter traits of swine. J Anim Sci 59, 1140-1148 Komender P, Hoeschel...

Ngày tải lên: 14/08/2014, 20:20

... covariance - estimation - caractère binaire INTRODUCTION Discrete traits are predominant in certain areas of animal production, e.g., fertility, prolificacy, viability and animal health. ... initial G is positive definite, then the subsequent estimates of G are also positive definite, which holds in combination with the applied Cholesky transformati...

Ngày tải lên: 14/08/2014, 20:20

... given in tables I and II. Original article Estimation of genetic parameters of preweaning performance in the French Limousin cattle breed MJ Shi D Laloë F Ménissier, G Renand Institut ... following formula: Direct and maternal parameters for preweaning growth traits Estimates of direct heritabilities of birth and weaning weights and preweaning...

Ngày tải lên: 14/08/2014, 19:22

... antagonism between egg production traits and egg weights and a positive correlation between traits within the same category. Comparison of the heritabilities obtained with univariate ... transformation resulted in an increase of all heritabilities without drastically modifying the genetic and residual correlations between these traits. Heritab...

Ngày tải lên: 14/08/2014, 20:20

... to divide the 11! into additive genetic variance, dominance genetic variance and variance due to preoviposition environment. On the other hand, in broiler chicks, Pinchasov (1991) ... their helpful suggestions. REFERENCES Abdellatif MA (1989) Genetic study of Dandarawy chicken: I. Heritabilities and genetic correlations of body weight and weight...

Ngày tải lên: 14/08/2014, 20:20

... limited, and it is important to optimize the scientific output obtained from a given technical and financial input. One optimization method is to study the evolution of ... families Phenotypic and genotypic variation A careful observation of Table V showing mean values and limits of each trait for parents and full-sib families, and of Ta...

Ngày tải lên: 09/08/2014, 02:21

... matrix x, x- i is x with column i deleted, a ii is element (i, i) of the inverse additive genetic relationship matrix A- 1, and Ai is row i of A- 1 without element i. Under ... derived maximum likelihood rather than Bayesian estimation via an expectation-maximization (EM) algorithm with Gibbs sampling of the liabilities within each E...

Ngày tải lên: 09/08/2014, 18:22

... additive genetic effects of the sire and dam of animal i and m i is the Mendelian sampling effect with variance , where F i is the average inbreeding of the parents of animal i. Hence there is ... They either explicitly or implicitly weight this information by the inverse of its sampling variance. PEV FL and PEV AF4 make use of information on the Cov(u, ). With infi...

Ngày tải lên: 14/08/2014, 13:21