Research Article

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10/18/2013
Genotypic correlations; Heritability; Principle component analysis; Zea mays L.

We estimated the association of genetic parameters with production characters in 64 maize (Zea mays) genotypes in a green house in soil with 40-100% moisture levels (percent of soil moisture capacity). To identify the major parameters that account for variation among the genotypes, we used single linkage cluster analysis and principle component analysis. Ten plant characters were ... more

R.W. Muhammad; A. Qayyum
12/19/2016
Bayes Theorem; Brazil; cluster analysis; Conservation of Natural Resources; Databases, Genetic; DNA, Plant; Endangered species; Genetic variation; Microsatellite Repeats; Myrtaceae; Principal component analysis

Cambuci (Campomanesia phaea) belongs to the Myrtaceae family and is native to the Atlantic Forest of Brazil. It has ecological and social appeal but is exposed to problems associated with environmental degradation and expansion of agricultural activities in the region. Comprehensive studies on this species are rare, making its conservation and genetic improvement difficult. Thus, it is ... more

D.N. Santos; C.F. Nunes; T.A. Setotaw; R. Pio; M. Pasqual; G.M.A. Cançado
09/21/2017
Arachis; Genome, Plant; Karyotype; Phylogeny; Polymorphism, Genetic; Principal component analysis

Arachis kuhlmannii occurs in Mato Grosso and Mato Grosso do Sul States, Brazil. Its area of occurrence partially overlaps with that of other species in the Arachis section. Because of their morphological similarities, these species are often mistaken one for another. This study aimed the correct classification of available accessions as Arachis kuhlmannii, or other species, and the ... more

A.P. Fávero; A.P.S. Peñaloza; C.R. Lopes; J.F.M. Valls
09/27/2017
Analysis of variance; Bertholletia; Dimensional Measurement Accuracy; Fruit; Genetic variation; Genotype; Phenotype; Plant breeding; Principal component analysis; Quantitative Trait, Heritable

Repeatability studies on fruit species are of great importance to identify the minimum number of measurements necessary to accurately select superior genotypes. This study aimed to identify the most efficient method to estimate the repeatability coefficient (r) and predict the minimum number of measurements needed for a more accurate evaluation of Brazil nut tree (Bertholletia excelsa) ... more

A.B. Baldoni; H. Tonini; F.D. Tardin; S.C.C. Botelho; P.E. Teodoro
05/13/2019
Gene action; General and specific combining ability; genetic breeding; Phaseolus vulgaris

The search for genetic material of snap beans with desirable yield traits is of utmost importance for yield increase in Brazil. We evaluated 12 snap bean genotypes by diallel crosses that presented characteristics of interest, so as to select the best genitors to generate productive populations in the snap bean breeding program of the Universidade Estadual do Norte ... more

A.B.S. Gomes; T.R.A. Oliveira; G.A. Gravina; D.P. Cruz; C.Q.S.S. Sant’Anna; R.F. Daher; L.C. Araújo; K.C. Araújo; G.H.F. Oliveira; R.S. Rocha; I.M. Pereira
07/27/2015
Reciprocal recurrent selection; Simple hybrid; Zea mays L.

The objective of this study was to evaluate the performance of 119 full sib progenies of the fifth cycle of reciprocal recurrent selection (RRS) derived from of Universidade Federal de Lavras maize breeding program. The experiment was carried out in an 11 x 11 triple lattice design at two locations (Lavras, Lambari). The plots consisted of two rows of 3 m, with four plants per 1 m and 0. ... more

N.B. Alves; J.M.V. Pádua; K.O.G. Dias; R.P. Diniz; M.L. Guedes; G.A. Cardoso; J.C. Souza
12/08/2015
Coleoptile sections; Haploid; Tissue culture; Zea mays L.

Doubled haploid (DH) technology, which is used for rapidly purifying genetic resources, is a key technology in modern maize breeding. The present study evaluated the tissue culture characteristics of maize haploid coleoptile sections, in order to provide a new way of haploid doubling. With 20 combinations of haploid coleoptile sections, obtained by hybridization within Reid, Tangsipingtou ... more

L. Jiang; G.X. Jing; X.Y. Li; X.Q. Wang; Z. Xing; P.K. Deng; R.G. Zhao
11/21/2016
Calculating study sample size; Experimental precision; Sampling; Zea mays L.

Tassel traits are important in maize breeding programs aiming to reduce the size and number of branches and maintain satisfactory pollen production in order to increase grain yield. The objectives of this study were to determine the sample size (number of tassels) required to estimate the mean values for tassel traits in maize genotypes and to verify the ... more

C.A. Wartha; C. Filho; A.D. Lúcio; D.N. Follmann; J.A. Kleinpaul; F.M. Simões; C.A. Wartha; C. Filho; A.D. Lúcio; D.N. Follmann; J.A. Kleinpaul; F.M. Simões
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

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