Báo cáo sinh học: "Genetic parameters for somatic cell score according to udder infection status in Valle del Belice dairy sheep and impact of imperfect diagnosis of infection" pptx

... as: Riggio et al.: Genetic parameters for somatic cell score according to udder infection status in Valle del Belice dairy sheep and impact of imperfect diagnosis of infection. Genetics Selection Evolution ... indicating whether an animal was infected at the time of sampling. Therefore, instead of using mixture models to determine the infect...

Ngày tải lên: 14/08/2014, 13:21

... days. 1. INTRODUCTION Interest in research into the yield and composition of milk from small ruminants in general has increased in recent decades because of the growing ∗ Correspondence and reprints E-mail: ... [24,29] and the initiation of breeding programmes [22]. The protein content and composition of sheep milk are important to the cheese manufacturer and are c...

Ngày tải lên: 14/08/2014, 13:21

... four birds of the same line and age in a cage. The individuals makingupacagewerecombinedatrandom.Inboth laying houses, cages were grouped into eight double rows. Each row consisted of three levels (top, ... been implemented in existing software for survival analysis. To analyse data on mortality due to cannibalism, a solu- tion might be to combine survival an alysis and a...

Ngày tải lên: 14/08/2014, 13:21

... to infection with intracellular parasites: isolation of a candidate for Bcg, Cell 73 (1993) 469–485. [51] Wright S., An analysis of variability in number of digits in an inbred strain of guinea ... Salmonella resistance in sheep 201 Table I. Number of offspring, sires and dams by series. Sex Batch 1 (mating in October 94) Batch 2 (mating in July 95) Batch 3 (ma...

Ngày tải lên: 14/08/2014, 13:22

... after oestrus induction. The preliminary analysis of variance of LSN and LSI resulted in models explaining between 19 and 31% of the total variance. The univariate model for LSI in the Suffolk ... values in the Suffolk breed and for LSI. Rescaling of the estimates to the underlying scale in ates the values for the heritabilities to values in the range of 0.13...

Ngày tải lên: 14/08/2014, 13:22

... number of dairy recorded goats increased in France from 111,000 in 1982 to 119,000 in 1985. Two-thirds were Alpine and one-third Saanen. Up to the beginning of the 1980s, the ... preliminary step for a successful selection for protein, especially since the literature for protein traits has been very sparse in the dairy goat, and...

Ngày tải lên: 14/08/2014, 19:23

... vector of underlying means P: vector of parity of cow effects ul: vector of sire of fetus effects U2 : vector of sire of cow effects U3 : vector of cow within sire of cow ... parameters and bull transmitting abilities were estimated for twinning in the Maine-Anjou breed. Twin calving performance was analyzed as a threshold binary...

Ngày tải lên: 14/08/2014, 20:20

... selection, choosing animals according to their perfor- mance and randomly mating selected individuals; (B) weighted selection un- balancing the offspring of each animal according to their genetic ... response. The modelling of heterogeneity is based on the hypothesis of the existence of a pool of genes controlling the mean of the performance and another pool of genes...

Ngày tải lên: 14/08/2014, 13:22

... mean grain angle reached a maximum inclination to the left at ring number 4, followed by a monotonic decrease towards a right-handed inclination. Clonal means of mean grain angle of rings 3 to 15 ... grain angle to se - lection for reduced grain inclination of individual rings. This provided an indication of the most efficient age to select for decreasing the average grain...

Ngày tải lên: 08/08/2014, 14:20

... follows: where y = vector of observations for the trait; (3 = vector of fixed effects; u = vector of animal effects; e = random vector of residual effects; X, Z are incidence matrices ... and females) and the hatching date of each generation. Population size was increased from the third generation mainly in order to maintain an opti...

Ngày tải lên: 09/08/2014, 18:22