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Evaluation of a new additive-dominance genomic model and implications for quant...
Miranda,Taiana Lopes Rangel; Resende,Marcos Deon Vilela de; Azevedo,Camila Ferreira; Nunes,Andrei Caíque Pires; Takahashi,Elizabete KeikoABSTRACT: The Fisher’s infinitesimal model is traditionally used in quantitative genetics and genomic selection, and it attributes most genetic variance to additive variance. Recently, the dominance maximization model was proposed and it prioritizes the dominance variance based on alternative parameterizations. In this model, the additive effects at the locus level are introduced into the model after the domina...
TOP GRAFTING TO ACCELERATE SELF-POLLINATION IN Eucalyptus BREEDING
Castro,Carla Aparecida de Oliveira; Santos,Gleison Augusto dos; Takahashi,Elizabete Keiko; Nunes,Andrei Caique Pires; Souza,Genaina Aparecida deABSTRACT The top grafting technique can make early flowering possible and consequently accelerate self-pollination in Eucalyptus breeding, reducing the period of each generation. This study aims to establish a methodology to top graft by applying the growth regulator paclobutrazol in self-pollinated Eucalyptus genotypes to induce early flowering and accelerate inbred line strategies. A total of 448 top grafts o...
ASSESSMENT OF GENETIC STABILITY OF MICROPROPAGATED Eucalyptus globulus Labill H...
Oliveira,Leandro Silva; Xavier,Aloisio; Otoni,Wagner Campos; Campos,José Marcello Salabert; Viccini,Lyderson Facio; Takahashi,Elizabete KeikoABSTRACT Flow cytometry and microsatellite markers were used to determine a genetic fidelity of micropropagated plants from the two Eucalyptus urophylla x E. globulus clones and a Eucalyptus grandis x E. globulus clone derived from adult material. Clones were repeatedly subcultured for 25 subcultures on MS medium supplemented with BA (2.22 µM) and ANA (0.05 µM) for in vitro shoot multiplication. The elongation ...
MULTIPLICAÇÃO E ALONGAMENTO IN VITRO DE CLONES HÍBRIDOS DE Eucalyptus globulus
Oliveira,Leandro Silva de; Xavier,Aloisio; Lopes,Aline Pontes; Takahashi,Elizabete Keiko; Otoni,Wagner CamposOs híbridos de Eucalyptus globulus representam uma excelente alternativa para o setor de celulose e papel, em razão dos ganhos em qualidade da madeira para a fabricação de celulose. Entretanto, estes híbridos têm apresentado recalcitrância ao enraizamento adventício. Assim, a micropropagação é apontada como a técnica para o rejuvenescimento desses híbridos adultos, viabilizando a propagação clonal dos mesmos. O...
ESTABELECIMENTO IN VITRO DE CLONES HÍBRIDOS DE Eucalyptus globulus
Borges,Silvano Rodrigues; Xavier,Aloisio; Oliveira,Leandro Silva de; Lopes,Aline Pontes; Otoni,Wagner Campos; Takahashi,Elizabete KeikoRESUMO O presente estudo teve como objetivos avaliar o comportamento de clones de Eucalyptus grandis W.Hill ex Maiden x Eucalyptus globulus Labill e Eucalyptus urophylla S.T.Blake x Eucalyptus globulus Labill e o efeito de diferentes introduções in vitro (aos 30, 90 e 150 dias após a poda do ápice das minicepas) na fase de estabelecimento in vitro. As minicepas, fornecedoras dos explantes para a introdução in v...
Effectiveness of ascorbic acid and PVP in the rooting of clonal mini-cuttings o...
Melo,Lucas Amaral de; Xavier,Aloisio; Takahashi,Elizabete Keiko; Rosado,Antônio Marcos; Paiva,Haroldo Nogueira deThe objective of this study is to evaluate the effectiveness of the antioxidants ascorbic acid and polyvinylpyrrolidone (PVP) in the rooting of mini-cuttings for three clones of Eucalyptus urophylla x Eucalyptus grandis. Mini-cuttings were gathered from a mini-clonal hedge which had been cultivated in concrete ducts containing washed sand. Five concentrations of each antioxidant were experimentally tested on ea...
Induction of cassava somatic embryogenesis in liquid medium associated to float...
Takahashi,Elizabete Keiko; Kobayashi,Adilson Kenji; Vieira,Luiz Gonzaga EstevesThe objective of this study was to examine the effect of two culture systems, liquid medium associated to floating membranes and solid medium, both supplemented with different concentrations of 2,4-D, in the induction of somatic embryogenesis of cassava (Manihot esculenta Crantz). Only 28% of the young leaf lobes (with 9 µM 2,4-D) were induced to form organized embryogenic structures (OES) with membrane rafts, ...