Results 51 to 60 of about 12,610 (233)

To vary or not to vary: A flexible empirical Bayes factor for testing variance components

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Random effects are the gold standard for capturing structural heterogeneity, such as individual differences or temporal dependence. Yet testing their presence is difficult because variance components are constrained to be non‐negative, creating a boundary problem. This paper introduces a flexible empirical Bayes factor (EBF) for testing random
Fabio Vieira, Hongwei Zhao, Joris Mulder
wiley   +1 more source

Estimation of inbreeding effect on conception in Czech Holstein

Czech Journal of Animal Science, 2019
The influence of calculated inbreeding coefficients on the conception of heifers and cows was analysed by a two-trait binary model for conceived/not conceived after each insemination on 677 234 Czech Holstein cows and heifers with 3 248 299 insemination ...
Michala Hofmannová, Josef Přibyl, Emil Krupa, Petr Pešek   +3 more
doaj   +1 more source

International bull evaluations by genomic BLUP with a prediction population [PDF]

Journal of Dairy Science, 2019
The purpose of this study was to determine whether multi-country genomic evaluation can be accomplished by multiple-trait genomic best linear unbiased predictor (GBLUP) without sharing genotypes of important animals. Phenotypes and genotypes with 40k SNP were simulated for 25,000 animals, each with 4 traits assuming the same genetic variance and 0.8 ...
B, Fragomeni, Y, Masuda, H L, Bradford, D A L, Lourenco, I, Misztal   +4 more
openaire   +2 more sources

The Augmented Hat‐Matrix of Hierarchical Generalised Linear Models and Its Use in Leverage Diagnostics

International Statistical Review, EarlyView.
Summary Defining a ‘hat‐matrix’ for a model is essential in many model diagnostic procedures, as it acts as an orthogonal projector from the observation space to the model space. In this paper, we introduce a unique Hat‐matrix for the class of hierarchical generalised linear models (HGLMs), which includes, as a special case, the subclass of generalised
Gianfranco Lovison, Mariangela Sciandra, Alessandro Albano, Chiara Di Maria   +3 more
wiley   +1 more source

Selection of high-yielding and stable sugarcane (Saccharum spp. hybrids) clones across diverse seasons using WAASB and MGIDI methods

Electronic Journal of Plant Breeding
Sugarcane is an important crop that significantly contributes to the production of sugar, jaggery, and bioethanol worldwide. One of the major challenges sugarcane breeders face is identifying superior clones that possess a combination of desirable ...
D. Adilakshmi1*, P. V. Padmavathi1, D. Purushotama Rao1 and Ch. Mukunda Rao2
doaj   +1 more source

Population Differentiation and Polygenic Selection in the Finnish Ayrshire Cows Selected on Genomic Information

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT The Finnish Ayrshire cattle belong to the Nordic Red breeds. The basis of selection in Nordic Red breeds shifted from traditional pedigree‐based breeding values to genomic breeding values between 2011 and 2014. Joint genetic evaluation and admixture among the Nordic Red breeds have led to the formation of a composite Nordic Red population ...
Katri Sarviaho, Minna Koivula, Terhi Iso‐Touru, Pekka Uimari, Katja Hänninen   +4 more
wiley   +1 more source

Pure line selection in a heterogeneous soybean cultivar

Crop Breeding and Applied Biotechnology, 2019
Although cultivars of autogamous plants are homogeneous genotypes, they may show natural variability due to mechanical mixing, natural hybridization, and mutation.
Lígia de Oliveira Amaral, Adriano Teodoro Bruzi, Pedro Milanez de Resende, Karina Barroso Silva   +3 more
doaj  

Modeling missing pedigree in single-step genomic BLUP [PDF]

Journal of Dairy Science, 2019
The objective was to compare methods of modeling missing pedigree in single-step genomic BLUP (ssGBLUP). Options for modeling missing pedigree included ignoring the missing pedigree, unknown parent groups (UPG) based on A (the numerator relationship matrix) or H (the unified pedigree and genomic relationship matrix), and metafounders.
Bradford, H.L., Masuda, Y., Vanraden, P.M., Legarra, Andres, Misztal, I.   +4 more
openaire   +5 more sources

Evaluating Selection Strategies Based on Inbreeding Load via Simulation

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT Inbreeding load is the fraction of the mutation load that is due to recessive action of mutations. This load is only expressed in individual's inbred offspring. As such, inbreeding load contributes to genetic heterogeneity among individuals and can thus be used as a criterion of selection.
Simona Antonios, Jana Obšteter, Ivan Pocrnic, Gregor Gorjanc, Silvia T. Rodríguez‐Ramilo, Zulma G. Vitezica   +5 more
wiley   +1 more source

Genetic Evaluation of Pure Line Laying Hens Based on Crossover Testing Data From Simulated Populations

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT Commercial laying hen breeding programs aim to maximize the performance of crossbred animals. However, selection is usually based on data from pure lines raised in controlled nucleus environments, which may not fully predict the yields under commercial conditions.
M. Sánchez‐Diaz, N. Ibáñez‐Escriche, D. López‐Carbonell, D. Cavero, L. Varona   +4 more
wiley   +1 more source