Results 41 to 50 of about 418,825 (313)

Genetic and Environmental Parameters of Milk Constituents for Five Breeds. II. Some Genetic Parameters

Journal of Dairy Science, 1968
Abstract Estimates were made of some genetic parameters of milk yield and its components and of the breeding values of sires for yields and constituent percentages. The data consisted of 1.449 cows of the Ayrshire, Guernsey, Holstein, Jersey, and Brown Swiss breeds located in 43 herds.
M C, Gacula, S N, Gaunt, R A, Damon
openaire   +2 more sources

Loading as a design parameter for genetic circuits [PDF]

2016 American Control Conference (ACC), 2016
A significant problem when building complex biomolecular circuits is due to context-dependence: the dynamics of a system are altered upon changes to its context, potentially degrading the system's performance. Here, we study retroactivity, a specific type of context-dependence, by analyzing the effects of loads on a transcription factor applied by the ...
Nithin Senthur Kumar, Domitilla Del Vecchio   +1 more
openaire   +3 more sources

Fatores ambientais e estimativa de herdabilidade para o intervalo desmame-cio de fêmeas suínas Environmental factors and heritability estimate for the weaning-estrus interval in sows

Revista Brasileira de Zootecnia, 2008
Este trabalho foi realizado com os objetivos de avaliar a influência de fatores ambientais e estimar a herdabilidade para a característica intervalo desmame-cio (IDC) de fêmeas suínas.
Aderbal Cavalcante Neto, Jeffrey Frederico Lui, José Lindenberg Rocha Sarmento, Norma Ribeiro, José Mauro Costa Monteiro, Humberto Tonhati   +5 more
doaj   +1 more source

Genomic-based genetic parameters for resilience across lactations in North American Holstein cattle based on variability in daily milk yield records

Journal of Dairy Science, 2023
: Considering the increasing challenges imposed by climate change and the need to improve animal welfare, breeding more resilient animals capable of better coping with environmental disturbances is of paramount importance. In dairy cattle, resilience can
Shi-Yi Chen, Jacquelyn P. Boerman, Leonardo S. Gloria, Victor B. Pedrosa, Jarrod Doucette, Luiz F. Brito   +5 more
doaj   +1 more source

Estimativas de componentes de (co)variância e herdabilidade direta e materna de pesos corporais em ovinos da raça Santa Inês Estimates of (co) variance components and direct and maternal heritability for growth traits in Santa Inês sheep breed

Revista Brasileira de Zootecnia, 1999
O objetivo deste trabalho foi estimar os componentes de (co)variância e herdabilidade direta e materna de pesos corporais em ovinos da raça Santa Inês.
Wandrick Hauss de Sousa, Carmen Silva Pereira, José Aurélio Garcia Bergmann, Francisco Luiz Ribeiro da Silva   +3 more
doaj   +1 more source

The Complex Parameter Landscape of the Compact Genetic Algorithm [PDF]

Algorithmica, 2020
AbstractThe compact Genetic Algorithm (cGA) evolves a probability distribution favoring optimal solutions in the underlying search space by repeatedly sampling from the distribution and updating it according to promising samples. We study the intricate dynamics of the cGA on the test functionOneMax, and how its performance depends on the hypothetical ...
Johannes Lengler, Dirk Sudholt, Carsten Witt   +2 more
openaire   +2 more sources

Discovering predictive variables when evolving cognitive models [PDF]

, 2005
A non-dominated sorting genetic algorithm is used to evolve models of learning from different theories for multiple tasks. Correlation analysis is performed to identify parameters which affect performance on specific tasks; these are the predictive ...
Fernand Gobet, Gobet, F., Peter C. R. Lane, Lane, PCR, Lane, P.C.R., Gobet, F   +5 more
core   +1 more source

Heterogeneidade de (Co)variância para as produções de leite e de gordura entre vacas puras e mestiças da raça Gir Heterogeneity of (Co)variance for milk and fat yields between purebred and crossbred Gir cows

Revista Brasileira de Zootecnia, 2004
Registros de produção de leite e de gordura de 5086 vacas puras e mestiças da raça Gir de rebanhos de diferentes Estados do Brasil, ajustados para idade adulta, rebanho, ano e estação de parto, foram utilizados para estimar componentes de (co)variância ...
Claudio Napolis Costa, Mário Luiz Martinez, Rui da Silva Verneque, Roberto Luiz Teodoro, Ivan Luz Ledic   +4 more
doaj   +1 more source

A rigorous evaluation of crossover and mutation in genetic programming [PDF]

, 2009
The role of crossover and mutation in Genetic Programming (GP) has been the subject of much debate since the emergence of the field. In this paper, we contribute new empirical evidence to this argument using a rigorous and principled experimental method ...
David R. White, White, D.R., Poulding, S., Simon Poulding   +3 more
core   +1 more source

Estimates of covariance functions for growth of Anglo-Nubian goats Estimativas de funções de covariância para crescimento de caprinos anglo nubianos

Revista Brasileira de Zootecnia, 2011
It was used 4,313 weight records from birth to 196 days of age from 946 Anglo-nubiana breed goats, progenies from 43 sires and 279 dams, controlled in the period from 1980 to 2005, with the objective of estimating covariance functions and genetic ...
José Ernandes Rufino de Sousa, Martinho de Almeida e Silva, José Lindenberg Rocha Sarmento, Wandrick Hauss de Sousa, Maria do Socorro Medeiros de Souza, Isabel Cristina Ferreira   +5 more
doaj   +1 more source