8 documents found, page 1 of 1
Novel approach to the selection of Psidium guajava genotypes using latent trait...
Silva,Flavia Alves da; Correa,Caio Cezar Guedes; Carvalho,Beatriz Murizini; Viana,Alexandre Pio; Preisigke,Sandra da CostaABSTRACT: Multicollinearity is a very common problem in studies that employ path analysis in agronomic crops, which generates unrealistic results and erroneous interpretations. This study was aimed at assessing the path analysis in data obtained from guava tree full-sib based on modelling multiple regressions applying latent variables to neutralize the effects of multicollinearity. Seven explanatory variables w...
Selection strategies in a segregating passion fruit population aided by classic...
Preisigke,Sandra da Costa; Viana,Alexandre Pio; Santos,Eileen Azevedo; Santos,Paulo Ricardo dos; Santos,Valquíria Oliveira dos; Ambrósio,MoisésABSTRACT Combining the use of agronomic, disease-resistance, and molecular informationcan greatly contribute to genetic progress in breeding programs. This study was developed to estimate the genetic distance between genotypes derived from backcrosses and their parents using morphoagronomic and molecular information and information pertaining to resistance to the Cowpea aphid-borne mosaic virus (CABMV), and ind...
Backcrosses in a segregating population of Passiflora mediated by morphoagronom...
Santos,Valquíria Oliveira dos; Viana,Alexandre Pio; Preisigke,Sandra da Costa; Santos,Eileen AzevedoABSTRACT The present study aims to characterize the genetic diversity of Passiflora setacea, P. edulis, their hybrids, and first-backcross progenies, and to indicate promising recombinants for generation advancement in a breeding program for transferring resistance to cowpea aphid-borne mosaic virus (CABMV). Ninety-one genotypes were evaluated for 37 morphoagronomic descriptors. The traits were analyzed to obta...
Canonical correlation for morphoagronomic and bromatological traits in silage c...
Crevelari,Jocarla Ambrosim; Durães,Nayara Norrene Lacerda; Santos,Paulo Ricardo dos; Azevedo,Flávio Henrique Vidal; Bendia,Laila Cecília RamosABSTRACT The aim of this study is to assess whether there is linear dependence between groups of morphoagronomic and bromatological traits in hybrid silage corn. Nineteen topcross hybrids and five checks were assessed in two different environments in Campos dos Goytacazes and Itaocara counties, Rio de Janeiro State, during the growing seasons 2013/2014. The study followed a randomized blocks design with four re...
Resistance to Pratylenchus brachyurus in Vitis species population through multi...
Santos,Paulo Ricardo dos; Viana,Alexandre Pio; Gomes,Vicente Martins; Preisigke,Sandra da Costa; Almeida,Odimar Ferreira de; Santos,Eileen AzevedoABSTRACT: Genetically diverse interspecific hybrids of Vitis were selected for resistance to Pratylenchus brachyurus. Three segregating populations with 57 hybrid crosses were evaluated. The parents included Vitis romanetiiC166-043 × 07355-075, 06354-047 × Cereza and 06354-047 × Nocera, selected from the germplasm bank at the University of California, Davis, the United States. The experiment was arranged in a r...
Associations among production and physicochemicalquality fruit traits in Passio...
Cavalcante,Natan Ramos; Viana,Alexandre Pio; Santos,Paulo Ricardo dos; Preisigke,Sandra da Costa; Ribeiro,Rodrigo Moreira; Tofanelli,Evillyn JacintoAbstract The present study was developed to identify the direct and indirect effects of fruit production traits in passion fruit on traits of agronomic interest as well as determine possible changes in associations between the characters after three cycles of recurrent selection. Twenty three half-sibling progenies were evaluated for the characteristics number of fruits per plant; fruit mass per plant (g); pulp...
Seleção precoce de espécies de Passiflora resistente a fusariose
Preisigke,Sandra da Costa; Silva,Lucas Pereira da; Serafim,Milson Evaldo; Bruckner,Claudio Horst; Araújo,Kelly Lana; Neves,Leonarda GrilloRESUMO O maracujazeiro azedo é uma importante fruteira amplamente produzida e consumida no Brasil. A produção e produtividade estão ameaçadas por vários problemas fitossanitários. Uns dos mais importantes é a fusariose, causada pelo fungo Fusarium oxysporum f. sp. passiflorae. Esta doença não tem controle eficiente. Neste sentido o objetivo deste trabalho foi avaliar a resposta de plantas, em estágio de muda, d...
Associations between vegetative and production traits in guava tree full-sib pr...
Santos,Paulo Ricardo dos; Preisigke,Sandra da Costa; Viana,Alexandre Pio; Cavalcante,Natan Ramos; Sousa,Carlos Misael Bezerra deAbstract: The objective of this work was to estimate the genetic parameters and to evaluate the associations between vegetative and yield characteristics, in full-sib progenies of guava tree (Psidium guajava). The following characteristics were evaluated: yield per plant, number of fruits, fruit mass, plant height, stem diameter, and canopy volume. The estimation of genetic parameters was obtained by the REML/B...