Báo cáo sinh học: " Genetic parameters for litter size in sheep: natural versus hormone-induced oestrus" pptx

... correlation (r pe ) for litter size after natural oestrus (LSN) and litter size after induced oestrus (LSI) in the Suffolk and Texel. For the different linear models the Akaike Information Criterion ... and litter size in Baluchi sheep using Gibbs sampling, J. Anim. Sci. 77 (1999) 533–540. To access this journal online: www.edpsciences.org Genetic parameters of litter...

Ngày tải lên: 14/08/2014, 13:22

... more in Lacaune than in Merino. Direct selection for LS in Merino induced no correlated phenotypic change in ES (except in the first generation), whereas survival increased ... is small, in particular when genetic correlation between OR and ES is negative. Using b-LS, increase in litter size corresponded exactly to the increase in O...

Ngày tải lên: 09/08/2014, 18:21

... and r 2 = 0.32 for line W1, 0.37 for line WB, and 0.17 for line WF, when using the genetic parameters given in Ellen et al. [8]; results are averages of five subsets, each containing 20% of the ... used for line W1; 6,916 for line WB; and 3,588 for line WF. Data analysis Data were analysed separately for each line. Two meth- ods to estimate genetic parameters were comp...

Ngày tải lên: 14/08/2014, 13:21

... between healthy and infected halves, assuming independence (i.e. infection in one half, which results in an increase in SCC, does not increase SCC in the other half). If Se was in fact less than ... model for inferring susceptibility to mastitis in dairy cattle: A procedure for likelihood-based inference. Genet Sel Evol 2004, 36:3-27. 12. ICAR, International Committee for An...

Ngày tải lên: 14/08/2014, 13:21

... being centrifuged for a standard time of 15 min at 2 500 rpm after longitudinal cutting and the whey being removed after draining for 45 min with the test-tube face downward (the curd remained ... were found for casein and serum protein contents nor their genetic relationships with other milk traits. The estimation of genetic parameters for casein content would help in re-exam...

Ngày tải lên: 14/08/2014, 13:21

... J.E., Genetics of helminth resistance, in: Axford R.F.E., Bishop S.C., Nicholas F.W., Owen J.B. (Eds.), 2nd edn., Breeding for disease resistance in farm animals, CAB international, Wallingford, ... (Eds.), 2nd edn., Breeding for disease resistance in farm Animals, CAB international, Wallingford, 2000, pp. 47–72. [15] Ekperigin H.E., Nagaraja K.V., Salmonella, Vet. Clin. North Am. Fo...

Ngày tải lên: 14/08/2014, 13:22

... genetic parameters, which constitutes a preliminary step for a successful selection for protein, especially since the literature for protein traits has been very sparse in ... larger in the Saanen than in the Alpine. Within-breed genetic parameters A review of the literature on estimates of genetic parameters in goats is presented in...

Ngày tải lên: 14/08/2014, 19:23

... 1991) Summary - Genetic parameters and bull transmitting abilities were estimated for twinning in the Maine-Anjou breed. Twin calving performance was analyzed as a threshold binary ... Original article Genetic parameters for twinning in the Maine-Anjou breed E Manfredi JL Foulley, M San Cristobal, P Gillard Institut National de la Recherche ......

Ngày tải lên: 14/08/2014, 20:20

... defining a selection index com- bining breeding values for the mean and environmental variance of a given trait in order to optimise a selection program. Our results suggest that before implementing ... level for founder population), u the vector of unknown parameters for the direct animal genetic effect, c the vector of unknown parameters for litter effect with 2649 levels, x...

Ngày tải lên: 14/08/2014, 13:22

... two innermost rings, above 0.8 (table II). The expected correlated response in mean grain angle of rings 3 to 15 following indirect selection for grain angle of the individual rings is shown in ... variance into additive and dominance variance. However, in the only published study reporting genetic pa - rameters for spiral grain in Norway spruce, the results indi - cated that th...

Ngày tải lên: 08/08/2014, 14:20