1,721,004 research outputs found
PRINCIPI DI MIGLIORAMENTO GENETICO IN CINOLOGIA. 1) Obiettivi, misurazioni, indagini sul tipo di controllo genico, stima dell’influenza relativa dell’ambiente e dell’eredità
No full textCinologia
PRINCIPI DI MIGLIORAMENTO GENETICO IN CINOLOGIA. 2) Genealogia, parentela e consanguineità
No full textCinologia
PRINCIPI DI MIGLIORAMENTO GENETICO IN CINOLOGIA.3) Metodi di selezione, sistemi di accoppiamento
No full textCinologia
Relazioni tra composizione chimica e parametri lattodinamografici nel latte bovino di diversi tipi genetici
No full textEstimation of Influence of Genetic and Environmental Factors on Slow Growing Rabbit Population: I. Preliminary Study.,
No full textThree models on estimates of variance components and fixed effects on weaning weight of slow growing rabbits population were compared. Measures on weaning weight (W-weight) from 86 progeny of 4 bucks mated with 12 does (3 dams/buck) were collected and sex (Sex), number of progeny weaned (N-weaned), Parity and age at weaning (W-age) were registered. Variance components of W-weight concerned buck-, doe-, error-, phenotipic-, additive genetic-, maternal-, and environmental- variance. Buck- and doe- random components were estimated by REML (REstricted Maximum Likelihood) in a nested design. Analysis was carried out by use of three different mixed models in which (fixed) effects of Sex, number of progeny weaned (N-weaned), Parity and age at weaning (W-age) were considered. In model-1 Sex and Parity were concerned as class variables and W-age as a covariate. In model-2 Sex and N-weaned were concerned as class variables and W-age as a covariate. In model-3 Sex was concerned as a class variable and N-weaned and W-age as covariates. In all models Sex do not showed significant differences. Parity and W-age denoted significant influences in model-1. N-weaned was found significant as a class variable (model-2) and as a covariate (model-3). Heritability (h2) estimates were: model-1=0.31, model-2=0.65 and model-3>1.00, respectively. Sex does not influence W-weight. All models results in estimates of heritability with high standard errors, subjecting need to repeat estimation on more extended data. Model-1, resulted in a more reliable estimate of h2 with respect to others models in which, some variance components were found negatives
La cluster analysis per lo studio delle relazioni tra componenti chimici e le proprietà casearie del latte della razza ovina Massese
No full textUso di un metodo di cluster analysis per lo studio delle relazioni tra alcuni acidi grassi contenuti nel latte di capre alimentate con insilato di mais. - , Brescia
No full textAnalisi della ripetibilità di test inerenti alcuni tratti comportamentali dei cani destinati all’addestramento alla guida, eseguiti a varie età
No full textLe fonti di variabilità ambientale della qualità tecnologica del latte di Frisona Italiana.
No full textCluster analysis delle variabili (componenti chimici e proprietà casearie del latte) e dei soggetti in pecore di razza Massese.
No full text- …
