|
|
|
| Registros recuperados: 12 | |
|
|
| Laviola,Bruno Galvêas; Silva,Sergio Delmar dos Anjos e; Juhász,Ana Cristina Pinto; Rocha,Rodrigo Barros; Oliveira,Reriton Joabél Pires de; Albrecht,Julio Cesar; Alves,Alexandre Alonso; Rosado,Tatiana Barbosa. |
| O objetivo deste trabalho foi avaliar o desempenho agronômico e o ganho genético pela seleção de famílias de meio-irmãos de pinhão-manso, cultivado em três regiões do Brasil. A partir de seleção fenotípica prévia, foram instalados três testes de progênies, em 2008, nos municípios de Planaltina, DF, Nova Porteirinha, MG, e Pelotas, RS. Utilizou-se o delineamento de blocos ao acaso, com três repetições e cinco plantas por parcela. Como testemunha, foram utilizadas sementes, colhidas ao acaso, de uma população sem seleção. Houve interação significativa entre os efeitos de genótipos por ambientes. As estimativas dos componentes de variância e dos parâmetros genéticos indicaram que é possível obter ganhos com a seleção das melhores famílias, nos ambientes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jatropha curcas; Interação genótipo x ambiente; Genética quantitativa; Melhoramento de plantas. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000500356 |
| |
|
|
| Rosado,Tatiana Barbosa; Tomaz,Rafael Simões; Rocha,Rodrigo Barros; Rosado,Antônio Marcos; Alves,Alexandre Alonso; Araújo,Elza Fernandes de; Alfenas,Acelino Couto; Cruz,Cosme Damião. |
| The objective of this work was to verify the existence of a lethal locus in a eucalyptus hybrid population, and to quantify the segregation distortion in the linkage group 3 of the Eucalyptus genome. A E. grandis x E. urophylla hybrid population, which segregates for rust resistance, was genotyped with 19 microsatellite markers belonging to linkage group 3 of the Eucalyptus genome. To quantify the segregation distortion, maximum likelihood (ML) models, specific to outbreeding populations, were used. These models consider the observed marker genotypes and the lethal locus viability as parameters. The ML solutions were obtained using the expectation‑maximization algorithm. A lethal locus in the linkage group 3 was verified and mapped, with high confidence,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Gametic selection; Genetic mapping; QTL; Rust resistance; Segregation distortion. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000900008 |
| |
|
|
| 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 |
| |
|
|
| Laviola,Bruno Galvêas; Alves,Alexandre Alonso; Gurgel,Fábio de Lima; Rosado,Tatiana Barbosa; Rocha,Rodrigo Barros; Albrecht,Julio Cesar. |
| In spite of increasingly widespread interest in planting physic nut, breeding efforts are still in its infancy. In that context, an important resource recently established aiming future breeding efforts was the assembly of a germplasm bank with near 200 accessions. The objective of this study was to estimate genetic parameters, repeatibility coefficients and genetic correlation between seven traits, measured in 110 accessions (half sib families) of this germplasm bank in different stages of development. The results show that higher relative values of additive variance were only found for yield and height, and the existence of low environmental variation (either of temporary or permanent nature) among plots within blocks. Given the high repeatibility values... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jatropha curcas; Plant breeding; Quantitative genetic. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000300008 |
| |
|
|
| Guimarães,Lúcio Mauro da Silva; Resende,Marcos Deon Vilela de; Lau,Douglas; Rosse,Leonardo Novaes; Alves,Alexandre Alonso; Alfenas,Acelino Couto. |
| Chrysophorte cubensis induced canker occurs in nearly all tropical and subtropical regions where eucalypts are planted, causing losses in both wood quality and volume productivity, especially so in the warmer and more humid regions of Brazil. The wide inter and intra-specific genetic variability of resistance to canker among Eucalyptus species facilitates the selection of resistant plants. In this study, we evaluated resistance to this pathogen in five Eucalyptus grandis (G) and 15 E. urophylla (U) trees, as well as in 495 individuals from 27 progenies derived from crosses between the trees. In the field, six-months-old test seedlings were inoculated with C. cubensis. Lesion length in the xylem and bark was measured eight months later. The results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic resistance; Genetic breeding; Eucalypt and interspecific hybrids. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000300024 |
| |
|
|
| Bhering,Leonardo Lopes; Laviola,Bruno Galvêas; Salgado,Caio Césio; Sanchez,Carlos Felipe Barrera; Rosado,Tatiana Barbosa; Alves,Alexandre Alonso. |
| The objective of this work was to estimate genetic gains in physic nut (Jatropha curcas) using selection indexes and to establish the best selection strategy for the species. Direct and indirect selection was carried out using different selection indexes, totalizing 14 strategies. One hundred and seventy five families from the active germplasm bank of Embrapa Agroenergy, Brasília, Brazil, were analyzed in a randomized complete block design with two replicates. The evaluated traits were: grain yield; seeds per fruit; endosperm/seed ratio; seed weight, length, width, and thickness; branches per plant at 0.5, 1.0, and 1.5 m; plant height; stem diameter; canopy projection on rows and between lines; canopy volume; juvenility (days to the first flowering); and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jatropha curcas; Biodiesel; Canopy volume; Cerrado; Juvenility; Seed size. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000300012 |
| |
|
| |
|
|
| Alves,Alexandre Alonso; Bhering,Leonardo Lopes; Cruz,Cosme Damião; Alfenas,Acelino Couto. |
| As high-throughput genomic tools, such as the DNA microarray platform, have lead to the development of novel genotyping procedures, such as Diversity Arrays Technology (DArT) and Single Nucleotide Polymorphisms (SNPs), it is likely that, in the future, high density linkage maps will be constructed from both dominant and co-dominant markers. Recently, a strictly genetic approach was described for estimating recombination frequency (r) between co-dominant markers in full-sib families. The complete set of maximum likelihood estimators for r in full-sib families was almost obtained, but unfortunately, one particular configuration involving dominant markers, segregating in a 3:1 ratio and co-dominant markers, was not considered. Here we add nine further... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Statistical genomics; Exogamic populations; Recombination frequency and maximum likelihood. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000300021 |
| |
|
|
| Domiciano,Gisele Pereira; Alves,Alexandre Alonso; Laviola,Bruno Galveas; Conceição,Leo Duc Haa Carson Schwartzhaupt da. |
| A obtenção de estimativas confiáveis de parâmetros genéticos, incluindo dados relacionados à variabilidade das populações sob melhoramento, é essencial para se elucidar a estrutura genética das populações e para se inferir sobre sua variabilidade genética e seu potencial de melhoramento. Nesse sentido, este trabalho teve por objetivo estimar parâmetros genéticos e a diversidade em progênies de Macaúba com base em características morfológicas e fisiológicas. Para o estudo, foram avaliadas características morfológicas e fisiológicas em 15 progênies de macaúba, em delineamento em blocos ao acaso com 5 repetições e 3 plantas por parcela, no espaçamento de 5x5m. Não houve variabilidade para a maioria das características fisiológicas no conjunto de progênies... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acrocomia aculeata; Biodiesel; Melhoramento genético. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000901599 |
| |
|
|
| Domiciano,Gisele Pereira; Kobayashi,Adilson Kenji; Molinari,Hugo Bruno Correa; Laviola,Bruno Galveas; Alves,Alexandre Alonso. |
| Abstract: The objective of this work was to evaluate physiological processes in contrasting physic nut (Jatropha curcas) genotypes during the flowering and fruiting stages. Gas exchange parameters were measured using an infrared gas analyzer, and morphological traits were evaluated during each stage under natural conditions, in a randomized complete block design with five replicates. Differences in yield between J. curcas accessions were not related to photosynthetic performance, but rather to the number of inflorescences and female flowers, which are genetically determined. Moreover, the net CO2 assimilation was equivalent in both genotypes, although they produced different amount of fruit. The genotypes differed consistently in terms of carboxylation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jatropha curcas; Biodiesel; Carboxylation efficiency; Gas exchange; Photosynthetic capacity. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000100010 |
| |
|
| |
|
|
| Rosado,Antônio Marcos; Rosado,Tatiana Barbosa; Alves,Alexandre Alonso; Laviola,Bruno Galvêas; Bhering,Leonardo Lopes. |
| O objetivo deste trabalho foi estimar os parâmetros genéticos e determinar a eficiência da seleção simultânea de clones de eucalipto baseada em produtividade, estabilidade e adaptabilidade. Foram utilizados 21 clones, com 36 meses de idade, pertencentes ao programa de melhoramento genético da empresa Cenibra. O experimento foi instalado em delineamento de blocos ao acaso, em quatro ambientes, com 21 repetições de uma planta por parcela. Os clones foram avaliados quanto às variáveis: diâmetro à altura do peito, altura da planta e volume total com casca. Os parâmetros genéticos foram estimados pela metodologia de modelos mistos (REML/BLUP), e a seleção baseou-se no método da média harmônica do desempenho relativo dos valores genéticos (MHPRVG), em três... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Interação genótipo x ambiente; MHPRVG; REML; BLUP. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000700013 |
| |
| Registros recuperados: 12 | |
|
|
|
