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Mostrando ítems 21-30 de 2077
Additive genetic variance and covariance between relatives in synthetic wheat crosses with variable parental ploidy levels
(Oxford University Press, 2021-01-07)
Cultivated bread wheat (Triticum aestivum L.) is an allohexaploid species resulting from the natural hybridization and chromosome doubling of allotetraploid durum wheat (T. turgidum) and a diploid goatgrass Aegilops tauschii ...
Variances of direct genetic effects, maternal genetic effects, and cytoplasmic inheritance effects for milk yield, fat yield, and fat percentage
(Amer Dairy Science Assoc-adsa, 2014)
Procedimento MIXED do SAS® para análise de modelos mistos
(Universidade de São Paulo (USP), Escola Superior de Agricultura Luiz de Queiroz (ESALQ), 1999-10-01)
O modelo misto consiste numa importante classe de modelos que tem sido tradicionalmente analisada por meio de procedimentos da análise de variância. Nos modelos mistos, três aspectos são fundamentais: estimação e testes ...
Procedimento MIXED do SAS® para análise de modelos mistos
(Universidade de São Paulo (USP), Escola Superior de Agricultura Luiz de Queiroz (ESALQ), 1999-10-01)
O modelo misto consiste numa importante classe de modelos que tem sido tradicionalmente analisada por meio de procedimentos da análise de variância. Nos modelos mistos, três aspectos são fundamentais: estimação e testes ...
Estimation of segregation variance for birth weight in beef cattle
(Elsevier, 2002-08)
Genetic evaluation using multibreed covariance theory requires estimating the segregation variance. The segregation variance is the amount by which the additive variance in the F2 exceeds that in F1. The goal of this ...
Additive genetic variance and covariance between relatives in synthetic wheat crosses with variable parental ploidy levels
(Oxford University Press, 2021)
Variance component estimates applying random regression models for test-day milk yield in Caracu heifers (Bos taurus Artiodactyla, Bovidae)
(Sociedade Brasileira de Genética, 2008-01-01)
Random regression models (RRM) were used to estimate covariance functions for 2,155 first-lactation milk yields of native Brazilian Caracu heifers. The models included contemporary group (defined as year-month of test and ...
Detecting and quantifying sources of non-stationarity via experimental semivariogram modeling
(Springer, 2012)
Conventional geostatistics often relies on the
assumption of second order stationarity of the random
function (RF). Generally, local means and local variances
of the random variables (RVs) are assumed to be constant
throughout ...
Genetic and environmental heterogeneity of residual variance of weight traits in Nellore beef cattle
(Biomed Central Ltd., 2012-06-06)
Background: Many studies have provided evidence of the existence of genetic heterogeneity of environmental variance, suggesting that it could be exploited to improve robustness and uniformity of livestock by selection. ...
Genetic and environmental heterogeneity of residual variance of weight traits in Nellore beef cattle
(Biomed Central Ltd., 2012-06-06)
Background: Many studies have provided evidence of the existence of genetic heterogeneity of environmental variance, suggesting that it could be exploited to improve robustness and uniformity of livestock by selection. ...