Research Article

Related GMR Articles

12/08/2011
Cluster; Genetic variability; Heritability; Parental selection; Principal component analysis

We characterized 13 accessions of dry peas of different origins from various growing regions in Argentina, based on three replications of 20 plants cultivated in 2009 and 2010 in a greenhouse, with the objective of selecting those with favorable characteristics for use in breeding programs. Significant differences were found for length and width of stipule and pod, length of the ... more

I. Gatti; M.A. Espósito; P. Almirón; V.P. Cravero; E.L. Cointry
11/29/2011
Carcass traits; Heritability; Repeatability; Ultrasound

Real-time ultrasound is currently used for in vivo carcass evaluation of beef cattle. We estimated heritability and repeatability coefficients for ultrasound-measured carcass traits in Nelore cattle. We measured longissimus muscle area, backfat thickness, and rump fat thickness in male and female animals ranging in age from 10 to 26 months. The variance components were estimated ... more

T.R. Pinheiro; M.E.Z. Mercadante; L.G. Albuquerque; J.N.S.G. Cyrillo; R.H. Branco
11/04/2011
Heritability; Multitrait model; Non-genetic factors; Repeatability

We examined the effects of environmental and genetic factors on the weaning-to-estrus interval (WEI) in sows. In order to perform the analyses of the environmental factors, 8104 observations of the 1st to the 6th WEI were carried out, while 6548 observations of the 1st to the 3rd WEI were carried out for the analyses of genetic factors. The environmental model included as fixed effects, ... more

C.D.S. Leite; J.F. Lui; L.G. Albuquerque; D.N.M. Alves
05/18/2010
Animal model; Carcass yield; Heritability; Likelihood ratio test; Maternal effect

The effect of genetic and non-genetic factors for carcass, breast meat and leg weights, and yields of a commercial broiler line were investigated using the restricted maximum likelihood method, considering four different animal models, including or excluding maternal genetic effect with covariance between direct and maternal genetic effects, and maternal permanent environmental effect. ... more

J.L.B.M. Grosso; J.C.C. Balieiro; J.P. Eler; J.B.S. Ferraz; E.C. Mattos; M. Filho
03/23/2010
Beef cattle; Genetic and phenotypic correlations; Heritability; Maternal effect; Swiss cattle; Weight gain

Genetic parameters for traits related to postweaning growth in Braunvieh cattle, reared under tropical and sub-tropical conditions in Brazil, were studied. Weight traits were weight at 365 days of age (W365, N = 4055), at 450 days (W450, N = 3453), and at 550 days (W550, N = 1946), while weight gains were gain from weaning to 365 days of age (WGW365, N = 3060), from weaning to 450 days ( ... more

D.C. Cucco; J.B.S. Ferraz; J.P. Eler; J.C.C. Balieiro; E.C. Mattos; L. Varona
06/13/2013
Half-sib; Heritability; Khyber Pakhtunkhwa; Maize; Pahari; Recurrent selection

This research was carried out at the Agriculture Research Farm, Khyber Pakhtunkhwa Agricultural University, Peshawar, and the Cereal Crops Research Institute, Pirsabak, Nowshera, during 2009 and 2010. Half-sib families (HS) derived from the maize variety Pahari in spring crop seasons 2009 and 2010 were developed at the Cereal Crops Research Institute. All HS families were detasseled well ... more

M. Noor; D. Shahwar; H. Rahman; H. Ullah; F. Ali; M. Iqbal; I.A. Shah; I. Ullah
02/27/2013
Correlation coefficients; Cotton; Drought; Heritability; Root; Shoot

Research pertaining to genetic variability parameters, heritability, and genotypic, phenotypic, simple, and environmental correlations for various seedling traits in five elite advanced cotton (Gossypium hirsutum L.) lines (FH-113, FH-114, FH-941, FH-942, and FH-2015) and one check (CIM-496) was carried out during October and November 2010 under greenhouse conditions at the ... more

M. Riaz; J. Farooq; G. Sakhawat; A. Mahmood; M.A. Sadiq; M. Yaseen
12/04/2014
Compound inflorescence; Genetic components; Heritability; Phaseolus vulgaris; Plant breeding

The number of pods per common bean plant is a primary component of grain yield, which depends on the number of flowers produced and on the flower set. Thus, a larger number of flowers per plant would increase yield. Lines with inflorescences that had a large number of flowers compared to common bean plants now under cultivation were identified. We analyzed the genetic control of this ... more

S.R. Guilherme; M.A.P. Ramalho; deF.B. Abreu; L.A. Pereira
05/30/2014
Beef cattle; Censored records; Fertility; Heritability; Reproduction

The continuous trait age at subsequent rebreeding (ASR) was evaluated using survival analysis in Nellore breed cows that conceived for the first time at approximately 14 months of age. This methodology was chosen because the restricted breeding season produces censored data. The dataset contained 2885 records of ASR (in days). Records of females that did not produce calves in the ... more

M.H. Van Melis; L.G.G. Figueiredo; H.N. Oliveira; J.P. Eler; G.J.M. Rosa; M.L. Santana; F.M. Rezende; J.B.S. Ferraz
02/02/2010
Bayesian approach; Beef cattle; Bos indicus; Genetic correlation; Growth traits; Reproduction

Survival or longevity is an economically important trait in beef cattle. The main inconvenience for its inclusion in selection criteria is delayed recording of phenotypic data and the high computational demand for including survival in proportional hazard models. Thus, identification of a longevity-correlated trait that could be recorded early in life would be very useful for selection ... more

M.H. Van Melis; H.N. Oliveira; J.P. Eler; J.B.S. Ferraz; J. Casellas; L. Varona

Pages