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| Registros recuperados: 390 | |
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| Candido,Willame dos Santos; Castoldi,Renata; Santos,Lucas da Silva; Tobar-Tosse,Dora Enith; Soares,Pedro Luiz Martins; Braz,Leila Trevisan. |
| ABSTRACT: In order to assess the genetic control of resistance in the melon ‘Gaúcho Redondo’ to the root-knot nematode Meloidogyne incognita, an experiment was conducted in a randomized complete block design with three blocks and six treatments using the parental lines ‘Gaúcho Redondo’ (P1 resistant) and JAB 20 (P2 susceptible), as well as F1, F2, and backcross generations (RC1P1 and RC1P2). Seventy days after inoculation, individual plants were evaluated for resistance using the nematode reproduction factor (RF). The hypothesis of monogenic inheritance was rejected by the chi-square test (χ2), and results indicated that resistance is controlled by more than one gene locus, as confirmed by the quantitative analysis that revealed the presence of six genes. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo; Genetic inheritance; Plant breeding; Reproduction factor. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500201 |
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| Oliveira,Nádia Cristina de; Suzukawa,Andréia Kazumi; Pereira,Carolina Bertuzzi; Santos,Hayssa Vilela; Hanel,Aldo; Albuquerque,Fernando Alves de; Scapim,Carlos Alberto. |
| ABSTRACT: The aim of this study was to evaluate popcorn genotypes for resistance to the fall armyworm, Spodoptera frugiperda. The experiment used a completely randomized design with 30 replicates. The popcorn genotypes Aelton, Arzm 05 083, Beija-Flor, Colombiana, Composto Chico, Composto Gaúcha, Márcia, Mateus, Ufvm Barão Viçosa, Vanin, and Viviane were evaluated,along with the common maize variety Zapalote Chico. Newly hatched fall armyworm larvae were individually assessed with regard to biological development and consumption of food. The data were subjected to multivariate analyses of variance and genetic divergence among genotypes was evaluated through the clustering methods of Tocher based on generalized Mahalanobis distances and canonical variable... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibiosis; Nutrition index; Plant breeding; Spodoptera frugiperda. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000200154 |
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| Laviola,Bruno Galvêas; Alves,Alexandre Alonso; Gurgel,Fábio de Lima; Rosado,Tatiana Barbosa; Costa,Rhayanne Dias; Rocha,Rodrigo Barros. |
| An initial evaluation of early selection of physic nut genotypes based on phenotypic data is presented. In order to predict the genetic gains with early selection, genetic parameters, e.g. additive genetic variance, were first obtained for grain yield along with other numerous traits. The results demonstrated that additive genetic variance exists not only for grain yield, which is considered to be the most important trait for oil and biodiesel production, but also for numerous other traits. The predicted genetic gains for grain yield, considering the selection of the 30, 20, 10 and 5 best families in the second crop year are respectively, 40.47, 48.43, 61.78 and 70.28%. With the selection of highly yielding physic nut genotypes indirectly genotypes with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jatropha curcas L.; Reproductive; Vegetative traits; Plant breeding. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000200004 |
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| Bueno Filho,Júlio Sílvio de Sousa; Vencovsky,Roland. |
| Plant breeders often carry out genetic trials in balanced designs. That is not always the case with animal genetic trials. In plant breeding is usual to select progenies tested in several environments by pooled analysis of variance (ANOVA). This procedure is based on the global averages for each family, although genetic values of progenies are better viewed as random effects. Thus, the appropriate form of analysis is more likely to follow the mixed models approach to progeny tests, which became a common practice in animal breeding. Best Linear Unbiased Prediction (BLUP) is not a "method" but a feature of mixed model estimators (predictors) of random effects and may be derived in so many ways that it has the potential of unifying the statistical theory of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: BLP; Plant breeding; Statistical genetics. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000500021 |
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| Spitti,Acácia Mecejana Diniz Souza; Carbonell,Sérgio Augusto Morais; Dias,Carlos Tadeu dos Santos; Sabino,Luis Gustavo; Carvalho,Cássia Regina Limonta; Chiorato,Alisson Fernando. |
| ABSTRACT The slow darkening of grains is sought by bean breeders because the consumers consider that darker grains demand more time for cooking. The analysis currently used takes around 90 days to differentiate grain color among genotypes. The objective was to evaluate the color as a function of the value of L* (lightness) of carioca beans, by natural and accelerated methods to verify equivalence between methods, validation of the methodology and identification of genotypes tolerant to the darkening. The grain darkening was compared and evaluated by natural darkening method under shelf conditions, in days storage, and accelerated darkening method under ultraviolet light, in hours. The natural darkening time of 90 days was statistically equal to 24 hours of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris L.; Coloring; Lightness; Plant breeding; Ultraviolet light.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100224 |
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| Matos,Rafael de; Resende,Juliano Tadeu Vilela de; Zeist,André Ricardo; Corte,Lígia Erpen-Dalla; Da-Silva,Paulo Roberto; Zeffa,Douglas Mariani. |
| ABSTRACT Knowledge of the combining ability of genotypes, genetic diversity, and heterosis play the paramount role in obtaining double-cross hybrids with high productivity. This study was aimed at evaluating these parameters in tomato genotypes using partial diallel crosses among the commercial single-cross hybrids, which verified the possibility of using double-cross hybrids for commercial purposes. Tomato genotypes included 15 double-cross hybrids, their genitors, and two commercial genotypes as checks. Of the fifteen double-cross hybrids of tomato, two crosses exhibited superiority, such as Aguamiel × Compack and Dominador × Compack, mainly for the total and commercial fruit yields. The phenotypic expression of the trait is controlled by the genes with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum lycopersicum; ISSR; Molecular markers; Plant breeding; Heterosis.. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542021000100205 |
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| Ematné,Hugo Junqueira; Nunes,José Airton Rodrigues; Souza,João Cândido de; Muñoz,Patrício Ricardo. |
| ABSTRACT Recurrent selection is a viable alternative for popcorn breeding. However, frequent verification of progress attained is required. The aim of this study was to estimate the genetic progress attained for popping expansion (PE) and grain yield (GY) after four cycles of recurrent selection and to compare this progress with the expected progress estimated at the end of each cycle while considering the genetic relationships between the progenies via univariate and multivariate mixed-model approaches. To estimate the genetic parameters and gains from indirect selection, cycles 1, 2, 3, and 4 of a UFLA population were used. To estimate the genetic gains achieved, the following cycles were used: UFLA (original) and cycles 0, 1, 2, 3, and 4, evaluated in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plant breeding; Grain yield; Popping expansion. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000200159 |
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| Hamawaki,Osvaldo Toshiyuki; Hamawaki,Raphael Lemes; Nogueira,Ana Paula Oliveira; Glasenapp,Jacqueline Siqueira; Hamawaki,Cristiane Divina Lemes; Silva,Carolina Oliveira da. |
| ABSTRACT In Brazil, as the soybean crop expands the losses caused by nematodes as well as its incidence in producing areas have increased. Therefore, this work aimed to develop a non-genetically modified soybean which combines desirable traits as the root-knot nematode resistance, early-maturity, high seed yielding, and high oil and protein contents. Consequently, seeds (F2) derived from the double-crossing between (Guarani x Sambaiba) x (M Soy 6101 x Conquista) were bulked to grow the F3 generation. Following generations were advanced by the SSD method of breeding until F6. Thus, plants showing superior characteristics were planted separately to perform progeny tests and then advanced breeding lines were thoroughly tested and compared to standards in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plant breeding; Disease resistance; Glycine Max; Pratylenchus brachyurus.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100222 |
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| Registros recuperados: 390 | |
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