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Association mapping of drought tolerance indices in wheat: QTL-rich regions on ...
Ballesta,Paulina; Mora,Freddy; Del Pozo,AlejandroABSTRACT Drought is likely the main abiotic stress that affects wheat yield. The identification of drought-tolerant genotypes represents an effective way of dealing with the continuous decrease in water resources as well as the increase in world population. The aim of this study was to identify single nucleotide polymorphisms (SNP) associated with drought tolerance indices in wheat by using a genome-wide associ...
Bayesian analysis of growth, stem straightness and branching quality in full-si...
Mora,Freddy; Ballesta,Paulina; Serra,NicolleABSTRACT Eucalyptus globulus is one of the most commonly planted hardwood species for industrial use in various temperate regions around the world. The present study aimed to evaluate 62 full-sib families of E. globulus in one of the southernmost progeny trials of the species in the south of Chile. Estimates of genetic parameters for stem straightness, branching quality and growth traits were based on a Bayesia...
Popcorn germplasm resistance to fungal diseases caused by Exserohilum turcicum ...
Kurosawa,Railan do Nascimento Ferreira; Vivas,Marcelo; Amaral,Antonio Teixeira do; Ribeiro,Rodrigo Moreira; Miranda,Samila BarbosaABSTRACT Compared with the common corn, popcorn shows greater susceptibility to pests and diseases occurrence, being the use of resistant cultivars the most efficient strategy. In this regard, Germplasm Banks deserve special attention because they contain accessions that can be used as sources of resistance in breeding programs. The State University of Northern Rio de Janeiro (UENF) maintains a popcorn Germplas...
Diallel analysis and genetic differentiation of tropical and temperate maize in...
Kulka,Vania Portes; Silva,Tereza Aparecida da; Contreras-Soto,Rodrigo I.; Maldonado,Carlos; Mora,Freddy; Scapim,Carlos AlbertoAbstract This study aimed to evaluate hybrids obtained by the cross among temperate × tropical elite maize lines, and to determine the genetic diversity and population differentiation of these inbred lines. Forty-nine hybrids were evaluated for seed yield, plant and ear heights, and for severity of Phaeosphaeria maydis and Exserohilum turcicum in four environments in Brazil. Hybrids were obtained from a partial...
SSR-based genetic analysis of sweet corn inbred lines using artificial neural n...
Ferreira,Fernando; Scapim,Carlos Alberto; Maldonado,Carlos; Mora,FreddyAbstract Studies on genetic diversity and population structure provide basic information at the molecular level, which is a key input for breeding programs of crop species. This study evaluated the genetic diversity of 12 elite lines of sweet corn, using 20 microsatellite markers. To determine the genetic differentiation among lines, we used an artificial neural network with the self-organizing map (SOM) algori...
A classification proposal for coefficients of variation in Eucalyptus experimen...
Mora,Freddy; Arriagada,OsvinABSTRACT The objective of this study was to present a classification proposal for coefficients of variation (CV) in Eucalyptus experiments, aiming at providing a useful tool for experiments involving growth, survival and wood quality traits. Ninety-four studies were selected from a search for peer-reviewed journals yielding a total of 508 data. The CVs were classified as low, moderate, high and very high. The m...
Genetic diversity assessed by microsatellite markers in sweet corn cultivars
Lopes,Ana Daniela; Scapim,Carlos Alberto; Machado,Maria de Fátima Pires da Silva; Mangolin,Claudete Aparecida; Silva,Tereza AparecidaInformation on genetic diversity is essential to the characterization and utilization of germplasm. The genetic diversity of twenty-two sweet corn cultivars (seventeen open-pollinated varieties, OPV, and five hybrids, H) was investigated by applying simple sequence repeat markers. A total of 257 primers were tested, of which 160 were found to be usable in terms of high reproducibility for all the samples tested...
Genetic evaluation of popcorn families using a Bayesian approach via the indepe...
Rodovalho,Marcos; Mora,Freddy; Arriagada,Osvin; Maldonado,Carlos; Arnhold,Emmanuel; Scapim,Carlos AlbertoThe objective of this study was to examine genetic parameters of popping expansion and grain yield in a trial of 169 half-sib families using a Bayesian approach. The independence chain algorithm with informative priors for the components of residual and family variance (inverse-gamma prior distribution) was used. Popping expansion was found to be moderately heritable, with a posterior mode of h² of 0.34, and 90...
Heritability of stem straightness and genetic correlations in Eucalyptus cladoc...
Vargas-Reeve,Felipe; Mora,Freddy; Perret,Sandra; Scapim,Carlos AlbertoThe aim of this study was to determine genetic parameters for straightness of the trunk of Eucalyptus cladocalyx, with a view to the selection of straight trees, while keeping the impact on growth minimal. The tests were conducted at two locations in the semi-arid region of Chile, using a randomized block design, with 30 replications and 49 half-sib families. The parameters were estimated by a bi-character mode...
PREDICCIÓN BAYESIANA DE PARÁMETROS GENÉTICOS EN CLONES DE Eucalyptus globulus B...
Mora,Freddy; Rubilar,Rafael; Emhart,Veronica Ingrid; Saavedra,JavierRESUMEN Se realizó un análisis Bayesiano de parámetros genéticos del crecimiento en 29 clones de Eucalyptus globulus de doce meses de edad, en el sur de Chile. Se consideraron dos condiciones ambientales contrastantes en cuanto a la disponibilidad hídrica: 1. Sin irrigación, y 2. Las plantas se irrigaron con un sistema localizado de riego. Para el análisis Bayesiano se utilizó el algoritmo de Gibbs en un modelo...