Research Article

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12/19/2016
Chromosome Mapping; Chromosomes, Plant; Computer simulation; Epistasis, Genetic; Inbreeding; Models, Genetic; Plant breeding; Plants; Quantitative trait loci; Sample Size; Selection, Genetic

The accuracy of quantitative trait loci (QTLs) identified using different sample sizes and marker densities was evaluated in different genetic models. Model I assumed one additive QTL; Model II assumed three additive QTLs plus one pair of epistatic QTLs; and Model III assumed two additive QTLs with opposite genetic effects plus two pairs of epistatic QTLs. Recombinant inbred lines (RILs) (50- ... more

C.F. Su; W. Wang; S.L. Gong; J.H. Zuo; S.J. Li
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Crosses, Genetic; Edible Grain; Genotyping Techniques; Likelihood Functions; Models, Genetic; Plant breeding; Probability; Quantitative trait loci; Regression Analysis; Reproducibility of Results; Selection, Genetic; Zea mays

Methodologies using restricted maximum likelihood/best linear unbiased prediction (REML/BLUP) in combination with sequential path analysis in maize are still limited in the literature. Therefore, the aims of this study were: i) to use REML/BLUP-based procedures in order to estimate variance components, genetic parameters, and genotypic values of simple maize hybrids, and ii) to fit stepwise ... more

T. Olivoto; M. Nardino; I.R. Carvalho; D.N. Follmann; M. Ferrari; V.J. Szareski; A.J. de Pelegrin; V.Q. de Souza
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DNA, Plant; Edible Grain; Genetic variation; Hordeum; Minerals; Plant breeding; Quantitative trait loci; Selection, Genetic

Mineral elements in barley (Hordeum vulgare) play an important physiological role in global human health. In this study, quantitative trait loci (QTLs) for concentration of nine mineral elements in barley grain and grass powder were detected in a population of 193 recombinant inbred lines of the barley cross Ziguangmangluoerling x Schooner and the parents. We observed large genetic variation ... more

Y.W. Zeng; J. Du; X.M. Yang; X.Y. Pu; L.X. Wang; J.Z. Yang; L.J. Du; T. Yang; S.M. Yang; Z.H. Sun
12/02/2016
Animals; Avian Proteins; Chickens; Female; Genetic association studies; Genotype; Insulin-like growth factor I; Phenotype; Polymorphism, Single-Stranded Conformational; Quantitative trait loci; Reproduction; Selection, Genetic

The insulin-like growth factor, IGF-I, plays an important role in the development of growth and reproductive traits. Single-strand conformation polymorphism analysis was used to detect and analyze polymorphisms and expression profiles of the IGF-I gene and its association with growth and reproductive traits of Jinghai yellow chickens. A point mutation g.295T>C was detected in the IGF-I gene ... more

M.A. Abdalhag; T. Li; L. Duan; T. Zhang; G. Zhang; J. Wang; Y. Wang
12/19/2016
China; Chromosomes, Plant; Cotton Fiber; Genotype; Gossypium; Plant breeding; Polymorphism, Genetic; Quantitative trait loci

Upland cotton (Gossypium hirsutum L.) is an important cash crop that provides renewable natural fiber worldwide. Currently limited genetic base leads to a decrease in upland cotton genetic diversity. Multi-parent advance generation inter-cross (MAGIC) populations can be used to evaluate complex agronomic traits in crops. In this study, we developed an upland cotton MAGIC population. A total of ... more

D.G. Li; Z.X. Li; J.S. Hu; Z.X. Lin; X.F. Li
12/19/2016
Plant breeding; Quantitative trait loci; Quantitative Trait, Heritable; Selection, Genetic; Zea mays

A challenge faced by popcorn breeding programs is the existence of a negative correlation between the two main traits, popping expansion and yield, which hinders simultaneous gains. The objective of this study was to investigate the use of a new variable or super trait, which favors the reliable selection of superior progenies. The super trait 'expanded popcorn volume per hectare' was ... more

A.T. do Amara Junior; D. Santos; I.F.S. Gerhardt; R.N.F. Kurosawa; N.F. Moreira; M.G. Pereira; deA. Gravina; F.H. de L. Silva
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Avena; Brazil; Disease resistance; Edible Grain; Fungicides, Industrial; Plant breeding; Quantitative trait loci; Selection, Genetic

The State of Rio Grande do Sul (RS) is the largest producer of oat in Brazil with the aid of consolidated breeding programs, which are constantly releasing new cultivars. The main objectives of this study were to: 1) evaluate the annual genetic progress in grain yield and hectoliter weight of the oat cultivars in RS, with and without fungicide use on aerial parts of plants; and 2) evaluate the ... more

D.N. Follmann; C. Filho; A.D. Lúcio; V.Q. de Souza; M. Caraffa; C.A. Wartha
3/22/2017
Animals; Bayes Theorem; Breeding; Genetic markers; Genomics; Genotype; Models, Genetic; Polymorphism, Single Nucleotide; Predictive Value of Tests; Quantitative trait loci; Regression Analysis; Selection, Genetic

Genomic selection (GS) is a variant of marker-assisted selection, in which genetic markers covering the whole genome predict individual genetic merits for breeding. GS increases the accuracy of breeding values (BV) prediction. Although a variety of statistical models have been proposed to estimate BV in GS, few methodologies have examined statistical challenges based on non-normal phenotypic ... more

M. Nascimento; F.F.E. Silva; M.D.V. de Resende; C.D. Cruz; A.C.C. Nascimento; J.M.S. Viana; C.F. Azevedo; L.M.A. Barroso
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Genetic association studies; Genotype; Phenotype; Plant breeding; Quantitative Trait, Heritable; Selection, Genetic; Sorghum

Sweet sorghum has emerged as an alternative crop for ethanol yield. The breeding of this crop is performed to obtain cultivars with high ethanol yield, which necessarily requires associating favorable phenotypes for multiple traits. Therefore, the aims of this study were to investigate the association between agro-industrial traits related to ethanol yield and identify the promising genotypes ... more

P.S.S. Leite; T.G. Fagundes; J.A.R. Nunes; R.A.C. Parrella; N.N.L. Durães; A.T. Bruzi
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Ecosystem; Genotype; Phenotype; Plant breeding; Polymorphism, Genetic; Quantitative Trait, Heritable; Selection, Genetic; Vigna

Estimating genetic parameters in plant breeding allows us to know the population potential for selecting and designing strategies that can maximize the achievement of superior genotypes. The objective of this study was to evaluate the genetic potential of a population of 20 cowpea genotypes by estimating genetic parameters and path analysis among the traits to guide the selection strategies. ... more

K.V. Lopes; P.E. Teodoro; F.A. Silva; M.T. Silva; R.L. Fernandes; T.C. Rodrigues; T.C. Faria; A.M. Corrêa

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