Results 31 to 40 of about 5,828,877 (254)

Genetic variance and genotype reaction norms in response to larval food manipulation for a trait important in scorpionfly sperm competition. [PDF]

open access: yes, 2008
Engqvist L. Genetic variance and genotype reaction norms in response to larval food manipulation for a trait important in scorpionfly sperm competition. Functional Ecology. 2008;22(1):070915213639001-???Sperm competition is an important attribute of many
L. Engqvist   +1 more
core   +1 more source

Combining Ability aAnd Genetic Variance Components of Yield and Yield Components in F1 And F2 Diallel Crosses of Soybean [PDF]

open access: yesJournal of Plant Production, 2021
Combining ability and genetic components of six soybean parents and their F1 and F2 half-diallel crosses were measured in Etay El-Baroud Agriculture Research Station during 2017, 2018 and 2019. mean square due to genotypes; parents, crosses and parent vs.
R. Ibrahim, F. Waly
doaj   +1 more source

Estimated variance components and genetic parameters for monthly egg production according to THI levels.

open access: yes, 2023
Estimated variance components and genetic parameters for monthly egg production according to THI levels.
Vibuntita Chankitisakul (14564612)   +2 more
core   +1 more source

Influence of genotype-environment interaction on the classification of Nellore bulls in Southern Brazil

open access: yesActa Scientiarum: Animal Sciences, 2015
The aim of this study was to assess the occurrence of genotype-environment interaction, as well as its effects on the magnitude of genetic parameters and the classification of Nellore breeding bulls for the trait adjusted weight at 205 days (W205) on ...
Tiago Bresolin   +4 more
doaj   +1 more source

Genetic analysis of longevity and their associations with fertility traits in Holstein cattle

open access: yesAnimal, 2023
The increase of longevity is intended to reduce involuntary culling rates, not extend the life span, and it reflects the ability of animals to successfully cope with the environment and disease during production.
H.H. Hu   +10 more
doaj   +1 more source

Genetic Variance Estimation over Time in Broiler Breeding Programmes for Growth and Reproductive Traits

open access: yesAnimals, 2023
Monitoring the genetic variance of traits is a key priority to ensure the sustainability of breeding programmes in populations under directional selection, since directional selection can decrease genetic variation over time.
Bolívar Samuel Sosa-Madrid   +4 more
doaj   +1 more source

Avaliação genética do crescimento de bovinos Nelore Mocho, por meio de modelos de multicaracterísticas

open access: yesRevista Ceres
RESUMO Objetivou-se, com este trabalho, estimar parâmetros genéticos para características do crescimento de animais da raça Nelore Mocho. Foram utilizados pesos corporais (Kg) ajustados aos 205 (P205), 365 (P365) e 550 (P550) dias.
Isabella Coutinho de Barros   +5 more
doaj   +1 more source

Heritability and Genetic Variance Components in Sunflower Single Cross Hybrids [PDF]

open access: yesJournal of Agricultural Science and Sustainable Production, 2015
In order to estimate genetic parameters in 16 Sunflower single cross hybrids obtained from crossing of 4 cytoplasmic male sterile and 4 fertility restorer lines, a North Carolina Design II was conducted using RCBD design with 3 replications at Khoy ...
AR Tarinejad   +3 more
doaj  

Estimation of prediction error variances via Monte Carlo sampling methods using different formulations of the prediction error variance [PDF]

open access: yes, 2009
peer-reviewedCalculation of the exact prediction error variance covariance matrix is often computationally too demanding, which limits its application in REML algorithms, the calculation of accuracies of estimated breeding values and the control of ...
Veerkamp Roel F   +15 more
core   +1 more source

QTLRel: an R Package for Genome-wide Association Studies in which Relatedness is a Concern

open access: yesBMC Genetics, 2011
Background Existing software for quantitative trait mapping is either not able to model polygenic variation or does not allow incorporation of more than one genetic variance component. Improperly modeling the genetic relatedness among subjects can result
Palmer Abraham A   +3 more
doaj   +1 more source

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