Results 31 to 40 of about 233,443 (255)

Stratified mass selection, individual selection between and within, and genetic gains in native maize varieties [PDF]

open access: yesRevista Ceres
Maize is an important cereal that is grown and consumed all over the world. Among the selection methods that contribute to increasing the frequency of favorable alleles in native maize populations, selection between and within and stratified mass ...
Joaes Alves da Silva Pereira   +1 more
doaj   +1 more source

COMPONENTS OF GENETIC VARIANCE IN THE CULTIVATED STRAWBERRY

open access: yesGenetics, 1968
FISHER (1918) subdivided genotypic variance (the variance due to genetic variation) into three components: (1) a part due to the average effects of genes (now called additive genetic variance) , (2) a part due to allelic interactions of genes that is called dominance variance, and (3) a part due to nonallelic interactions of genes that is called ...
R, Watkins, L P, Spangelo
openaire   +2 more sources

Genetic Variance Components in Cotton by Generation Mean Analysis

open access: yesBADEGGI JOURNAL OF AGRICULTURAL RESEARCH AND ENVIRONMENT, 2021
The mode of gene action for the expression of quantitative traits is decided by the predominance of variances due to additive, dominance and epistasis gene effects. In this experiment, involving four F1 crosses (TCH1716 x TCB37, TCH1705-101 x TCB209, KC2 x TCB26 and TSH0250 x DB3) of upland cotton, inheritance of major yield components by Generation ...
A. Isong   +7 more
openaire   +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 Components and Heritabilities of Several Avocado Traits [PDF]

open access: yesJournal of the American Society for Horticultural Science, 1993
Genetic variance components for avocado (Persea americana Mill.) traits were estimated to improve avocado breeding efficiency. The additive and nonadditive genetic variance components were calculated from the variances between and within crosses. In all nine traits examined, i.e.-anise scent,
Uri Lavi   +4 more
openaire   +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

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

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

Multi-Trait analysis of growth traits: fitting reduced rank models using principal components for Simmental beef cattle

open access: yesCiência Rural, 2016
: The aim of this research was to evaluate the dimensional reduction of additive direct genetic covariance matrices in genetic evaluations of growth traits (range 100-730 days) in Simmental cattle using principal components, as well as to estimate (co ...
Rodrigo Reis Mota   +6 more
doaj   +1 more source

Genetic Correlations between Days to Calving across Joinings and Lactation Status in a Tropically Adapted Composite Beef Herd

open access: yesAgriculture, 2022
Female fertility is essential to any beef breeding program. However, little genetic gain has been made due to long generation intervals and low levels of phenotyping.
Madeliene L. Facy   +4 more
doaj   +1 more source

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