Báo cáo sinh học: "Genetic evaluation for a quantitative trait controlled by polygenes and a major locus with genotypes not or only partly known" doc

... become available (l!TacLennan and Phillips, 1992). There is no difficulty with genetic evaluation for traits controlled by a major locus and polygenes when major locus genotypes ... For a quantitative trait controlled by polygenes and a major locus with 2 alleles, equations for the maximum likelihood estimation of major...

Ngày tải lên: 14/08/2014, 19:22

... year 4 onwards the nucleus herd is closed, and from year 6 onwards evaluation of candidates for selection is based on nucleus herd information only. This is shown in Appendix ... and encouragement of Robin Thompson and Brian McGuirk, and financial support from Premier Breeders, UK and from the Natural Sciences and Engineering Research...

Ngày tải lên: 14/08/2014, 19:23

... 2STEP and LAM is not straightforward. For 2STEP, genetic parameters are given on the hazard rate scale, the probability that an animal has a failure at a given time t, whereas genetic parameters of ... it is in accordance with the accuracy for methods that con- tain only half- or full-sib information (at least for lines W1 and WB ) [11,39]. Furthermore , a high rank co...

Ngày tải lên: 14/08/2014, 13:21

... high, 0.68 at W21 and 0.94 at W42 [24], and the ge- netic correlation between mean and environmental variance for these traits was higher than that for WG (−0.31 for W21 and −0.38 for W42). Given ... Models Sorensen and Waagepetersen [33] have proposed the use of a Bayesian approach for canalisation analysis to better manage the model defined by San Cristobal-Gaudy et a...

Ngày tải lên: 14/08/2014, 13:22

... were treated with Trizol reagent (Invitrogen, Carlsbad, CA, USA) and total RNA was isolated according to the manu- facturer protocol. Subsequently, RNA was extracted with chloroform and precipitated with ... 94°C for 30 seconds, 60°C for 45 seconds and 72°C for 1.5 minutes, using the primer pair 5'-ACC AAC GAT GGCGTG TCC AT-3' and 5'-TAG AAG GCA CAG TCG AGG-...

Ngày tải lên: 14/08/2014, 19:22

... effect. A more detailed study with the Gg T and Fg T (genetic diversity) statistics and with a spatial autocorrelation analysis shows that, for the a (non-agouti) and tb ... means as a single set, 2 statistical methods have been applied: an Anova and a Kruskal-Wallis H test with corrections (non-parametric variance analysis) . Pheneti...

Ngày tải lên: 09/08/2014, 18:21

... assumed that all required variances and covariances are known at least to proportionality. categories (table 5) were sires 5 and 1 for calving preparation and calf viability, respectively ... easy to obtain because the W ;; , submatrices are diagonal. III. Numerical application to three binary traits A. Data Data on 3 binary traits - calving...

Ngày tải lên: 09/08/2014, 22:22

... animals and 2.23 for bacteria negative animals; whereas the observed genetic variance was 0.16 for infected animals and 0.22 for bacteria-nega- tive animals. Repeatability estimates within lactations ranged ... repeatability within (r wit ) and across (r acr ) lactations (± SE) for SCS traits Table 4 Heritability for infection status with normal and probit analysis Normal...

Ngày tải lên: 14/08/2014, 13:21

... as well as for fat content. 3.3. Genetic and phenotypic correlations Genetic and phenotypic correlations among lactation traits are given in Table IV. Correlations between milk yield and qualitative ... genetic and phenotypic correlations among these variables were estimated using a multitrait repeatability animal model. 2. MATERIALS AND METHODS 2.1. Data Data were collected on...

Ngày tải lên: 14/08/2014, 13:21

... The Salmonella enterica serovar Abortusovis (thereafter simplified as S. abortuso- vis) is pathogenic for sheep and goats, only. It can cause major animal health problems: abortion of ewes and death ... information on the quality of the estimation of the maternal genetic variance and the correlation between direct and maternal effects. Simulations were done for a trait norma...

Ngày tải lên: 14/08/2014, 13:22