Báo cáo sinh học: " Genetic parameters related to environmental variability of weight traits in a selection experiment for weight gain in mice; signs of correlated canalised response" pot

... daily gain. Changes due to selection have been widely reported in mice and estimation of realised heritability for post-weaning gain and realised genetic correlations for post- weaning gain and ... methods for WG: (A) the classic selection, choosing animals according to their perfor- mance and randomly mating selected individuals; (B) weighted selection un- balancing...

Ngày tải lên: 14/08/2014, 13:22

... animals with unknown health sta- tus [1]. We are in the fortunate position of having a dataset of SCC in dairy sheep for which bacteriological data are also available, indicating whether an animal ... Theobservedphenotypicvar- iance was 5.57 for infected animals and 2.23 for bacteria negative animals; whereas the observed genetic variance was 0.16 for infected animals and...

Ngày tải lên: 14/08/2014, 13:21

... a trait responding to vaccination. Indeed, the growth rate after vaccination was largely affected since the gain of weight varied from −8 to +5 kg within 7 days while it was about +1 to +6 kg for ... (vaccinal strain). They were slaughtered 10 days after the inoculation. Several traits were measured at inoculation and/or slaughtering to estimate the genetic resistance o...

Ngày tải lên: 14/08/2014, 13:22

... class="bi x0 y0 w1 h1c" alt ="" Statistical analysis All records were analysed by an SAS univariate procedure to test normal distribu- tion, and some extreme and abnormal data ... was to estimate and discuss genetic parameters for the 12 traits recorded for the first 5 generations in a selection experiment for laying Brown Tsaiya ducks...

Ngày tải lên: 09/08/2014, 18:22

... the genetic variance (or covariance) pertaining to logits i and goal of this study was to estimate in two meat-type strains, genetic parameters of the two main deformities ... sex, Ulk a (q, x 1) vector pertaining to random effects of sires and maternal grandsires and u 2k a (q 2 x 1) vector pertaining to random effects of d...

Ngày tải lên: 09/08/2014, 18:22

... number of meals per day; three criteria relating to daily characteristics: average feed intake per day (kg), average total eating time per day (min) defined as the total duration ... duration of all visits made on the same day, average rate of feed intake (g/min) defined as the ratio of daily feed intake over daily eating time. Feeding...

Ngày tải lên: 09/08/2014, 18:22

... Compar- ing genetic parameters of 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 ... for line WF. Data analysis Data were analysed separately for each line. Two meth- ods to estimate genetic parameters were compared: 1) LAM, a linear animal mo del includ...

Ngày tải lên: 14/08/2014, 13:21

... regard, both traits had a genetic correlation near unity and very close heritability and repeatability values and were equally correlated to LILCY, indicating that protein and casein contents are ... 0.001) to the variations in milk yield, fat, protein, casein, 586 M.H. Othmane et al. Table II. Least square means of total milk traits by age of ewe and lambing type. Variabl...

Ngày tải lên: 14/08/2014, 13:21

... Further investigations are now required to increase the accuracy of the genetic parameter estimates by using both larger data sets and including new meat traits such as water-holding capacity, ... dams for the generation hatched in 1999 and 48 dams for the generation hatched in 1998. An initial global estimation of the genetic parameters of body weight, breast yield a...

Ngày tải lên: 14/08/2014, 13:22

... samples. Initial serial correlations between samples were high, indicating that samples were strongly autocorrelated. The usage of data augmentation is known to increase auto-correlation in the chain ... [9]. Inference on the genetic parameters for litter size was also made by a Bayesian approach. LSN and LSI were analysed in bi-variate threshold AM and SM, assuming an underly...

Ngày tải lên: 14/08/2014, 13:22