Results 11 to 20 of about 1,041,525 (314)

Estimation of quantitative genetic parameters [PDF]

Proceedings of the Royal Society B: Biological Sciences, 2008
This paper gives a short review of the development of genetic parameter estimation over the last 40 years. The need to analyse genetic processes in both animal selection experiments and animal breeding improvement programmes motivated the majority of this work.
Thompson, R.
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Genetic parameters for social effects on survival in cannibalistic layers: Combining survival analysis and a linear animal model [PDF]

, 2010
Background Mortality due to cannibalism in laying hens is a difficult trait to improve genetically, because censoring is high (animals still alive at the end of the testing period) and it may depend on both the individual itself and the behaviour of its ...
Veerkamp Roel F, Veerkamp, Roel F., Ducrocq, V.P., Ducrocq, Vincent, Bijma, Piter, Bijma Piter, Ducro, B.J., Esther D Ellen, Ellen, Esther D., Bijma, P., Ellen Esther D, Ellen, E.D., Veerkamp, Roel F, Roel F Veerkamp, Ducro, Bart J., Veerkamp, R.F., Vincent Ducrocq, Ducro Bart J, Bart J Ducro, Ducrocq Vincent, Ducro, Bart J, Piter Bijma   +21 more
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Genetic Parameter Estimation and Whole Sequencing Analysis of the Genetic Architecture of Chicken Keel Bending

Frontiers in Genetics, 2022
Bone health is particularly important for high-yielding commercial layer chickens. The keel of poultry is an extension of the abdomen side of the sternum along the sagittal plane and is one of the most important bones.
Zhihao Zhang, Weifang Yang, Tao Zhu, Liang Wang, Xiaoyu Zhao, Guoqiang Zhao, Lujiang Qu, Yaxiong Jia   +7 more
doaj   +1 more source

Genetic and phenotypic trends for growth traits of buffaloes in Brazil

Italian Journal of Animal Science, 2010
The objectives this paper were to estimate genetic parameters and genetic and phenotypic trends of birth weight (BWT) and weights adjusted to 205 (WT205), 365 (WT365) and 550 (P550) days of age of beef buffaloes born from 1985 to 2003 in Brazil.
W.R. Lamberson, J.C. de Souza, A. Amorim Ramos, P.L. Souza Carneiro, C.H. Mendes Malhado   +4 more
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Genetic trends of Mexican zebu cattle populations

Italian Journal of Animal Science, 2022
In Mexico, the genetic evaluations in Zebu breeds began in 2011 and there are no studies about the genetic progress achieved. Thus, this research aimed to quantify and analyse the genetic progress for growth traits in the Mexican Zebu beef cattle ...
Neon Larios-Sarabia, Joel Domínguez-Viveros, Jorge Hidalgo, Rodolfo Ramírez-Valverde, Rafael Núñez-Domínguez, Ricardo Emmanuel Martínez-Rocha, Felipe Alonso Rodríguez-Almeida, Cesar Villegas-Gutiérrez, Fernando Saiz-Pineda   +8 more
doaj   +1 more source

Cosmological Parameter Estimation with Genetic Algorithms

Universe, 2023
Genetic algorithms are a powerful tool in optimization for single and multimodal functions. This paper provides an overview of their fundamentals with some analytical examples. In addition, we explore how they can be used as a parameter estimation tool in cosmological models to maximize the likelihood function, complementing the analysis with the ...
Ricardo Medel-Esquivel, Isidro Gómez-Vargas, Alejandro A. Morales Sánchez, Ricardo García-Salcedo, José Alberto Vázquez   +4 more
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Genetic parameters for milk somatic cell score and relationships with production traits in primiparous dairy sheep [PDF]

, 2007
A total of 13,066 first-lactation test-day records of 2,277 Valle del Belice ewes from 17 flocks were used to estimate genetic parameters for somatic cell scores (SCS) and milk production traits, using a repeatability test-day animal model.
van Kaam, J. B. C. H. M., Portolano, B., Bovenhuis, H., van Kaam, J.B.C.H.M., Kaam, J.B.C.H.M., van, Finocchiaro, R., BOVENHUIS H., FINOCCHIARO, Raffaella, VAN KAAM JBCHM, Riggio, V.; id_orcid, RIGGIO, Valentina, PORTOLANO, Baldassare, Riggio, V.   +12 more
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Estimating quantitative genetic parameters in wild populations:A comparison of pedigree and genomic approaches [PDF]

, 2014
The estimation of quantitative genetic parameters in wild populations is generally limited by the accuracy and completeness of the available pedigree information. Using relatedness at genome-wide markers can potentially remove this limitation and lead to
Pemberton, Josephine M, Ellis, Philip A., Pemberton, Josephine M., Bérénos, Camillo, Ellis, Philip A, Pilkington, Jill G., Pilkington, Jill G   +6 more
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GENETIC CONTRIBUTION OF RAM ON LITTER SIZE IN ŠUMAVA SHEEP [PDF]

Poljoprivreda, 2015
The objective of the present study was to quantify the service sire effect in terms of (co) variance components of born and weaned lambs number and to propose models for the potential inclusion of this effect in the linear equations for breeding value ...
Jitka Schmidová, Michal Milerski , Alena Svitáková, Luboš Vostrý   +3 more
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Genetic parameters for somatic cell score according to udder infection status in Valle del Belice dairy sheep and impact of imperfect diagnosis of infection [PDF]

, 2010
Background Somatic cell score (SCS) has been promoted as a selection criterion to improve mastitis resistance. However, SCS from healthy and infected animals may be considered as separate traits.
Portolano, B., Bovenhuis, H., Bovenhuis Henk, Riggio Valentina, Portolano Baldassare, Bishop, S.C., Henk Bovenhuis, Valentina Riggio, Bishop Stephen C, Riggio, Valentina; id_orcid, Bovenhuis, Henk, Baldassare Portolano, Scatassa, S., Stephen C Bishop, Bovenhuis, H, Riggio, V., RIGGIO, Valentina, Bishop, SC, Bishop, Stephen C., Portolano, Baldassare   +19 more
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