|
|
|
| Registros recuperados: 74 | |
|
|
| Viana,Alexandre Pio; Bruckner,Claudio Horst; Prieto Martinez,Herminia Emilia; Martinez y Huaman,Carlos Alberto; Mosquim,Paulo Roberto. |
| A tolerância de cinco porta-enxertos de videira ('IAC 766 Campinas', 'IAC 313 Tropical', 'IAC 572 Jales', '420-A' e 'Ripária do Traviú') à salinidade foi avaliada em um ensaio, em casa de vegetação, em solução nutritiva, com cinco níveis de NaCl (0, 5, 10, 15 e 20 mmol L-1). Foram determinados a taxa fotossintética, a condutância estomática, a taxa transpiratória, a altura de plantas e o peso da matéria seca. A altura de planta e o peso da matéria seca foram afetados pelo incremento da salinidade. As cultivares mais tolerantes ('IAC 572', 'IAC 766' e 'Ripária do Traviú') apresentaram, mesmo nas maiores doses de NaCl, fotossíntese líquida de 0,75 mimol m-2 s-1, acompanhada pela manutenção da abertura estomática e da taxa transpiratória. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Videira; Porta-enxerto; Salinidade; Tolerância; Crescimento. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000100021 |
| |
|
| |
|
|
| Ferreira,Rulfe Tavares; Viana,Alexandre Pio; Barroso,Déborah Guerra; Resende,Marcos Deon Vilela de; Amaral Júnior,Antônio Teixeira do. |
| The increasing demand for raw material for multiple uses of forest products and by-products has attracted the interest for fast growing species, such as the Australian Cedar (Toona ciliata), which presents high productive and economic potential. This study aimed at estimating genotypic parameters and values for the species through the use of the BLUP procedure, at individual level, with repeated measures, by means of the conventional evaluation procedures and the introduction of innovative digitalization of the measurements by digital camera with the images provided by the Imagej software system. The main objective is to subsidize the beginning of a breeding program for the species. The assays were carried out in private properties, in plantations located... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Australian Cedar; Mixed models. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000300006 |
| |
|
|
| Cortes,Diego Fernando Marmolejo; Santa-Catarina,Renato; Azevedo,Alinne Oliveira Nunes; Poltronieri,Tathianne Pastana de Sousa; Vettorazzi,Julio Cesar Fiorio; Moreira,Nádia Fernandes; Ferreguetti,Geraldo Antônio; Ramos,Helaine Christine Cancela; Viana,Alexandre Pio; Pereira,Messias Gonzaga. |
| ABSTRACT: The selection of superior Carica papaya (L) genotypes depends on the availability of genetic variability and on the favorable and simultaneous response of the genotypes to those traits of most interest. However, manual phenotyping (MP) demands intensive labor, is time-consuming and expensive. The aim of the current study is to access the efficiency of image-based phenotyping (IBP) in estimating genetic parameters and in selecting F4 recombinant inbred lines. The genetic parameters and values were estimated in accordance with the REML/BLUB procedure and combined selection using the selection index based on standardized genetic values. The majority of traits accessed through IBP showed experimental coefficients of variation similar to those found... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carica papaya; Digital phenotyping; Genetic gains; Genetic parameters. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000300208 |
| |
|
|
| Silva,Flavia Alves da; Correa,Caio Cezar Guedes; Carvalho,Beatriz Murizini; Viana,Alexandre Pio; Preisigke,Sandra da Costa; Amaral Júnior,Antônio Teixeira do. |
| ABSTRACT: 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 were measured – fruit mass (FM), fruit length (FL), fruit diameter (FD), mesocarp thickness (MT), peel thickness (PT), pulp mass (PM), total number of fruits (NTF) –, plus the main dependent variable, total yield per plant (YIELD). In accordance with the multicollinearity scenario, eleven values were tested with the addition of the constant K to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: SEM methodology; Trail crest; Correlation. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000200501 |
| |
|
|
| Gonçalves,Gustavo Menezes; Viana,Alexandre Pio; Amaral Junior,Antônio Teixeira do; Resende,Marcos Deon Vilela de. |
| Sugarcane (Saccharum spp.) is one of the most important crops cultivated in the tropics and subtropics and plays a significant economic and environmental role in Brazil. Twentyfour new clones were evaluated in different locations as potential models for recommendation as new varieties. The mixed model methodology, using the harmonic mean of the relative performance of genetic values (MHPRVG), facilitated the analysis of genotypic stability and adaptability, culminating in the recommendation of clones for each location. MHPRVG ranked clones RB92579, RB867515, SP81-3250, RB947520 and RB931530 as the best five, and, additionally, clones with greater genotypic potential were identified for each test in the six localities. |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000100009 |
| |
|
|
| Viana,Alexandre Pio; Bruckner,Claudio Horst; Prieto Martinez,Herminia Emilia; Martinez y Huaman,Carlos Alberto; Mosquim,Paulo Roberto. |
| Com o objetivo de avaliar a tolerância de porta-enxertos de videira à condições de salinidade, realizou-se um ensaio, em casa de vegetação, com cinco cultivares de porta-enxertos ('IAC 766 Campinas', 'IAC 313 Tropical', 'IAC 572 Jales', '420-A' e 'Ripária do Traviú'), cultivadas em solução nutritiva, com cinco níveis de NaCl (0, 5, 10, 15 e 20 mmol L-1). Foram determinados os teores de sódio, potássio, magnésio e cálcio no material vegetal. Os cultivares apresentaram padrões diferenciados, no tocante às concentrações dos nutrientes, nos diversos órgãos analisados (raiz, caule, folhas superiores e inferiores). As mais sensíveis, como a '420-A' e 'IAC 313', alocaram grande quantidade de Na nas folhas e apresentaram restrições na absorção de K, Mg e Ca, em... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Videira; Porta-enxertos; Salinidade; Tolerância; Nutrientes. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000100028 |
| |
|
|
| Santos,Paulo Ricardo dos; Viana,Alexandre Pio; Gomes,Vicente Martins; Preisigke,Sandra da Costa; Almeida,Odimar Ferreira de; Santos,Eileen Azevedo; Rodrigues,Daniele Lima; Rodrigues,Rosana; Walker,Michael Andrew. |
| ABSTRACT: 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 randomized block design, with three replications and three plants per plot. Root mass, nematodes per gram of root and reproduction factor were determined and used as quantitative variables; 16 multi categoric descriptors were also evaluated. The traits were analyzed using the Ward-Modified Location Model procedure (Ward-MLM) for the composition of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitis genotypes; Nematode; Root; Genetic variability. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001500424 |
| |
|
|
| Ambrósio,Moisés; Viana,Alexandre Pio; Ribeiro,Rodrigo Moreira; Preisigke,Sandra Costa; Cavalcante,Natan Ramos; Silva,Flavia Alves da; Torres,Géssica Xavier; Sousa,Carlos Misael Bezerra de. |
| ABSTRACT: The purpose of this study was to conduct selection, genetic parameter estimation, and prediction of genetic values for 18 S1 families of guava trees using mixed model methodology and simultaneous selection of traits by means of the additive selection index, multiplicative selection index, and mean rank adapted from Mulamba. All families analyzed were obtained by means of self-fertilization of superior genotypes (full siblings) from the genetic breeding program of guava trees at the Universidade Estadual do Norte Fluminense. An experimental randomized block design with 18 S1 families, three replicates, and ten plants per plot was used. A total of 540 genotypes (individual plants) of guava tree were evaluated. Genetic parameter estimation and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Inbreeding; Guava tree; Mixed models; Breeding. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000201101 |
| |
|
|
| Cortes,Diego Fernando Marmolejo; Catarina,Renato Santa; Barros,Gislanne Brito de Araújo; Arêdes,Fernanda Abreu Santana; Silveira,Silvaldo Felipe da; Ferreguetti,Geraldo Antônio; Ramos,Helaine Christine Cancela; Viana,Alexandre Pio; Pereira,Messias Gonzaga. |
| ABSTRACT Manual phenotyping for papaya Carica papaya (L) breeding purposes limits the evaluation of a great number of plants and hampers selection of superior genotypes. This study aimed to validate two methodologies for the phenotyping of morpho-agronomic plant traits using image analysis and fruit traits through image processing. In plants of the ‘THB’ variety and ‘UENF/Caliman-01’ hybrid two images (A and B) were analyzed to estimate commercial and irregularly shaped fruits. Image A was also used in the estimation of plant height, stem diameter and the first fruit insertion height. In ‘THB’ fruits, largest and smallest diameters, length, and volume were estimated by using a caliper and image processing (IP). Volume was obtained by water column... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carica papaya; Phenomics; Digital image processing. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000400294 |
| |
|
|
| Moreira,Nádia Fernandes; Pereira,Telma Nair Santana; Catarina,Renato Santa; Cortes,Diego Fernando Marmolejo; Vettorazzi,Júlio Cesar Fiorio; Ramos,Helaine Christine Cancela; Viana,Alexandre Pio; Pereira,Messias Gonzaga. |
| ABSTRACT The aim of this study was to estimate the percentage of deformed fruits (carpelloid, pentandric, and bananoid), summer sterility, repeatability coefficients, and correlations among the variables for floral abnormalities; and select genotypes withthe lowest incidence of deformed fruits and summer sterility. In theexperiment, which involved 254 plants, traits were evaluated using the digital-phenotypic method and the obtained images were processed and analysed using ImageJ v1.48 software with the Cell Counter plugin. Summer sterility had the highest percentage of occurrence in the evaluated periods. Based on the quantificationof total abnormalities, the 30 genotypes with the lowest incidence offloral abnormalities were selected. Summer sterility is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carica papaya L.; Female sterility; Carpellody; ImageJ. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000200158 |
| |
|
|
| Vianna-Silva,Thais; Resende,Eder Dutra de; Pereira,Silvia Menezes de Faria; Viana,Alexandre Pio; Rosa,Raul Castro C.; Carlos,Lanamar de Almeida; Vitorazi,Letícia. |
| Este trabalho teve como objetivo avaliar a influência dos estádios de maturação sobre as características físicas dos frutos de maracujazeiro-amarelo para indicação do melhor momento de colheita na região Norte Fluminense. Iniciou-se a colheita aos 52 dias após a antese (DAA), antes das primeiras mudanças de cor da casca serem observadas, prosseguindo-se aos 54, 56, 58, 60, 64, 66, 68, 70, 76, 83 e aos 100 DAA. No último dia de colheita, nos frutos marcados ocorreu abscisão no período da noite. Durante o amadurecimento dos frutos, foi observado aumento progressivo dos parâmetros de Hunter L e b, e na região inferior do fruto ocorreu maior índice de luminosidade e de amarelecimento do que na superior. Houve redução da espessura da casca até o momento do... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Passiflora edulis f. flavicarpa D.; Maracujá-amarelo. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052008000200029 |
| |
|
|
| Vivas,Marcelo; Silveira,Silvaldo Felipe da; Vivas,Janieli Maganha Silva; Viana,Alexandre Pio; Amaral Junior,Antonio Teixeira do; Pereira,Messias Gonzaga. |
| Genótipos crioulos são importantes fontes de genes de adaptação, rusticidade e resistência de plantas a doenças bióticas e a estresse ambiental. Avaliou-se neste trabalho o potencial genético de contribuição de genótipos crioulos de mamoeiro na resistência a mancha-de-phoma. O experimento, implantado em blocos casualizados com seis repetições, foi composto de 24 progênies dioicas de meios-irmãos de mamoeiro que segregaram para o sexo, sendo avaliadas apenas as plantas com flores femininas. Foram estimados os componentes de variância e o valor genético de progênies para incidência e severidade de mancha-de-phoma via modelos mistos. As estimativas de herdabilidade e acurácia seletiva permitiram predizer situação muito favorável à seleção de progênies... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carica papaya; Resistência genética; Stagonosporopsis caricae; Variabilidade genética. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052014000400013 |
| |
|
|
| Preisigke,Sandra da Costa; Viana,Alexandre Pio; Santos,Eileen Azevedo; Santos,Paulo Ricardo dos; Santos,Valquíria Oliveira dos; Ambrósio,Moisés; Silva,Flávia Alves da; Walter,Fernando Henrique de Barros. |
| ABSTRACT 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 indicate genotypes with potential for generation advancement. The studied population consisted of 91 genotypes from the first backcross, oneinterspecific hybrid, and the species Passiflora setacea and P. edulis. For morphoagronomic characterization, the traits number of fruits, total fruit weight, average fruit weight, and area under the disease... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Passiflora; CABMV; Backcross; Parental proportion. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020000100047 |
| |
|
|
| Souza,Margarete Magalhães; Viana,Alexandre Pio; Pereira,Telma Nair Santana. |
| Yellow passion fruit (Passiflora edulis f. flavicarpa) is a self-incompatible crop with purple corona flowers (PCF). Plants exhibiting white corona flowers (WCF) were observed in an experimental field located in Campos dos Goytacazes - RJ, Brazil. This study was performed in order to test the fertility of these genotypes through studies of in vivo pollination, meiotic behavior and pollen viability. Using in vivo pollination, the mean fruit set percentage, obtained from self-pollinations at the moment that flowers open, was 70.83% in WCF and 0% in PCF. In terms of cytological analysis, for both kinds of plants, WCF and PCF, the meiotic behavior was considered regular, considering the high meiotic index estimated for both of them, 96.3% and 97.7%, and pollen... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Passion flower; Self-compatibility; In vivo pollination; Meiotic behavior; Pollen viability. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052010000100003 |
| |
|
|
| Santos,Valquíria Oliveira dos; Viana,Alexandre Pio; Preisigke,Sandra da Costa; Santos,Eileen Azevedo. |
| ABSTRACT 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 obtain a distance matrix, based on the Gower algorithm, using the Ward-Modified Location Model (MLM) procedure for the composition of genetic groups. The adopted strategy led to the formation of five homogeneous groups, where groups I, III, and V comprised the parents P. setacea, P. edulis and interspecific hybrids, respectively, while groups II and IV... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding; Sour passionfruit; Ward-mlm; Cabmv; Morphoagronomic characterization. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000400542 |
| |
|
| |
|
| |
|
| |
|
| |
| Registros recuperados: 74 | |
|
|
|
