Research Article

Related GMR Articles

12/04/2014
Backcrossing; Carica papaya L.; Genetic diversity; Molecular markers; Parental proportion

The low number of improved cultivars limits the expansion of the papaya crop, particularly because of the time required for the development of new varieties using classical procedures. Molecular techniques associated with conventional procedures accelerate this process and allow targeted improvements. Thus, we used microsatellite markers to perform genetic-molecular characterization of ... more

H.C.C. Ramos; M.G. Pereira; T.N.S. Pereira; G.B.A. Barros; G.A. Ferreguetti
08/14/2015
broiler; Genetic correlation; Gibbs sampling; Heritability; Liver fat trait; Restricted maximum likelihood

Intensive selection of broilers for improved growth rate is known to exert a negative effect on broiler health, such as an increase in body fat (and its related diseases). Excessive fat deposition in the liver can cause fatty liver hemorrhagic syndrome (FLHS); in addition, traits associated with liver fat have also been associated with FLHS. This study explored the genetic relationships ... more

M.J. Liang; Z.P. Wang; L. Xu; L. Leng; S.Z. Wang; P. Luan; Z.P. Cao; Y.M. Li; H. Li
12/29/2015
Dairy cattle; Genetic correlation; Heritability; Random regression; Somatic cell count

Selection for lower somatic cell count has been included in the breeding objectives of several countries in order to increase resistance to mastitis. Genetic parameters of somatic cell scores (SCS) were estimated from the first lactation test day records of Brazilian Holstein cows using random-regression models with Legendre polynomials (LP) of the order 3-5. Data consisted of 87,711 TD ... more

C.N. Costa; G.G. Santos; J.A. Cobuci; G. Thompson; J.G.V. Carvalheira
12/21/2015
Broiler chicken; Gallus gallus; Genotyping; Heritability; Microsatellite; Quantitative trait loci mapping

Selection among broilers for performance traits is resulting in locomotion problems and bone disorders, once skeletal structure is not strong enough to support body weight in broilers with high growth rates. In this study, genetic parameters were estimated for body weight at 42 days of age (BW42), and tibia traits (length, width, and weight) in a population of broiler chickens. ... more

B.N.N. Ragognetti; N.B. Stafuzza; T.C.S. Chud; N.V. Grupioni; V.A.R. Cruz; J.O. Peixoto; K. Nones; M.C. Ledur; D.P. Munari; T.B.R. Silva
12/22/2015
Brassica napus; Correlation coefficients; Gene action; Heritability; Quality traits

A study on three leading lines (KN-256, KN-257, and KN-258) of Brassica napus and an approved variety, Punjab-Sarson, was conducted to gain insight into the genetic control of some quality traits using generation mean analysis. Our results showed that additive gene action predominated in the inheritance of oil content and erucic acid in cross KN-256 x KN-257 and in that of ... more

S. Ahmad; H.A. Sadaqat; M.H.N. Tahir; F.S. Awan
11/24/2015
Heritability; Longevity; Selection of females; Threshold model

We evaluated the genetic association of growth traits [weight adjusted to 205 days of age (W205), 365 days of age (W365), and 550 days of age (W550); weight gain between 205 days of age and 365 days of age (WG1) and between 365 days of age and 550 days of age (WG2)] and reproductive traits [age at first calving (AFC); first calving interval (FCI)] with stayability in the herd (STAY), ... more

E.C.A. Rizzo; F.R.A. Neto; I.D.P.S. Diaz; M.M. Dias; R.B. Costa; H.T. Ventura; H.N. Oliveira; A.J.S. Falcão
10/28/2015
General and specific combining ability; Genotypic correlations; Heritability; Principal component analysis; Zea mays L.

Fifty-four genotypes of maize were crossed and evaluated in the field during the crop season in February 2012 under both normal and water stress conditions. To identify the major parameters responsible for variation among genotypes, single linkage cluster analysis and principle component analysis (PCA) were carried out. Thirteen characters were studied. The PCA showed that the first six ... more

R.W. Muhammad; A. Qayyum; A. Hamza; M.Q. Ahmad; N.S. Naseer; S. Liaqat; B. Ahmad; W. Malik; E. Noor
10/21/2015
Accuracy; Computer simulation; Detection power; Heritability; Multiple procedures; QTL mapping

The study of quantitative trait effects is of great significance for molecular marker-assisted breeding. The accuracy of quantitative trait loci (QTL) mapping is the key factor affecting marker-assisted breeding, and is extremely significant. The effect of different heritability rates (10, 30, 50, 70, and 90%) on the accuracy of QTL mapping of five recombinant inbred lines (RILs) were ... more

C.F. Su; Z.B. Liu; Y.G. Li
02/19/2016
Bayesian analysis; Beef cattle; Genetic correlation; Heritability; Postweaning weight gain; Skin thickness

The objective of the present study was to estimate genetic parameters for skin thickness (ST) and postweaning weight gain (PWG550) in Nellore cattle. Records were obtained from 152,392 Nellore animals born between 2001 and 2011. ST was measured in the posterior region of the animal’s scapula with a millimeter caliper. The animals were assigned to different contemporary groups, formed on ... more

A.M. Maiorano; M.C.S. Oliveira; J.N.S.G. Cyrillo; L.G. Albuquerque; R.A. Curi; J.A.I.I.V. Silva; A.M. Maiorano; M.C.S. Oliveira; J.N.S.G. Cyrillo; L.G. Albuquerque; R.A. Curi; J.A.I.I.V. Silva
10/17/2016
Acrocomia aculeata; Biofuel; Genetic diversity; Genetic parameters; Heritability; Plant genetic resource

Macaw palm (Acrocomia aculeata) is a promising species for use in biofuel production, and establishing breeding programs is important for the development of commercial plantations. The aim of the present study was to analyze genetic diversity, verify correlations between traits, estimate genetic parameters, and select different accessions of A. ... more

S.M. Coser; S.Y. Motoike; T.R. Corrêa; T.P. Pires; M.D.V. Resende

Pages