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| Registros recuperados: 32 | |
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| Moura,Vicente Pongitory Gifoni; Dvorak,William Stephen. |
| Pinus caribaea var. hondurensis (Sénécl) Barr. & Golf. is a tropical pine that naturally occurs in lowland areas of Belize, El Salvador, Guatemala, Honduras, Nicaragua, and eastern Mexico. It has been one of the most studied tropical pines and the one with the most commercial importance in Brazil. The objective of this work was to select the best provenances for plantations and best trees in families for the establishment of seed orchards. For that a trial with five provenances and 47 open-pollinated families was planted near Planaltina, Federal District, in the Cerrado Region of Brazil. The provenances tested were Poptun (Guatemala), Gualjoco, Los Limones, El Porvenir and Santa Cruz de Yojoa (Honduras) and assessed at 12 years of age. Poptun and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pinus; Selection criteria; Genetic gain; Heritability; Breeding methods. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001000200003 |
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| TOLEDO,JOSÉ FRANCISCO FERRAZ DE; ARIAS,CARLOS ALBERTO ARRABAL; OLIVEIRA,MARCELO FERNANDES DE; TRILLER,CLÁUDIA; MIRANDA,ZILDA DE FÁTIMA SGOBERO. |
| The yearly genetic progress obtained by breeding for increased soybean yield has been considered acceptable worldwide. It is common sense, however, that this progress can be improved further if refined breeding techniques, developed from the knowledge of the genetic mechanisms controlling soybean yield, are used. In this paper, data from four cultivars and/or lines and their derived sets of F2, F3, F7, F8, F9 and F10 generations assayed in 17 environments were analyzed to allow an insight of the genetic control of soybean yield under different environmental conditions. The general picture was of a complex polygene system controlling yield in soybeans. Additive genetic effects predominated although dominance was often found to be significant. Complications... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Genetic control; Selection; Polygenes; Genotype environment interaction; Breeding methods. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000900011 |
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| Pray, Carl E.. |
| This report reviews the impacts of the Asian Maize Biotechnology Network (AMBIONET), organized by the International Maize and Wheat Improvement Center (CIMMYT) with funding from the Asian Development Bank to strengthen the capacity of public maize research institutions in China, India, Indonesia, Philippines, Thailand, and Vietnam to produce high-yielding, disease resistant, stress tolerant maize cultivars. It was found that, during its lifetime (1998-2005), AMBIONET clearly benefited researchers and institutions in participating countries, as well as CIMMYT. In addition, there was good progress toward developing improved cultivars. Asian farmers are just beginning to gain from the work, but their future benefits will likely pay for AMBIONET’s relatively... |
| Tipo: Report |
Palavras-chave: Zea mays; Plant breeding; Biotechnology; Breeding methods; Research methods; Disease resistance; Yield increases; Research institutions; China; India; Indonesia; Philippines; Thailand; Viet Nam; Asia; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies; F30; F01. |
| Ano: 2006 |
URL: http://purl.umn.edu/56103 |
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| Silva, Fabiana Mota da; Pereira, Elise de Matos; Val, Bruno Henrique Pedroso; Perecin, Dilermando; Mauro, Antonio Orlando Di; Unêda-Trevisoli, Sandra Helena. |
| O sucesso dos programas de melhoramento genético depende dos procedimentos de seleção e dos métodos de melhoramento adotados para a condução das populações segregantes. O objetivo deste trabalho foi avaliar a eficiência do método Bulk com seleção em F3, (BulkF3) em relação ao método Bulk, bem como comparar qual estratégia de seleção é mais eficiente em termos de ganho genético. Para a realização do trabalho foram utilizadas 20 populações segregantes, conduzidas pelos dois métodos. Foram selecionadas 60 melhores famílias de cada método, de acordo com a performance média agronômica. O delineamento utilizado foi de blocos aumentados. Foram avaliadas as seguintes características agronômicas: altura da inserção da primeira vagem e da planta na maturidade,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agronomia; Melhoramento genético; Genética quantitativa; Melhoramento genético; Genetic gain; Glycine max; Breeding methods; Mixed model.; Melhoramento genético. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39324 |
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| Silva, Fabiana Mota da; Pereira, Elise de Matos; Val, Bruno Henrique Pedroso; Perecin, Dilermando; Mauro, Antonio Orlando Di; Unêda-Trevisoli, Sandra Helena. |
| The success of breeding programs depends on selection procedures and on the breeding methods adopted for selecting segregating populations. The objective of this study was to evaluate the efficiency of the Bulk method with selection in the F3 generation (BulkF3) compared to that of Bulk method as well as determine the most effective selection strategy in terms of genetic gain. Twenty segregating populations were selected by two methods. The 60 best families of each method were selected according to their average agronomic performance. An augmented block design was used. The following agronomic traits were evaluated: insertion height of first pod, plant height at maturity, number of branches and of pods per plant, 100-seed weight, and grain yield. For... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciências Agrárias; Melhoramento genético; 5.01.03.05-9 Agronomia; Melhoramento genético; Genética quantitativa Melhoramento genético genetic gain; Glycine max; Breeding methods; Mixed model. Melhoramento genético. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39324 |
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| Destro,Deonisio; Bizeti,Henrique Stoco; Garcia,Leandro Anderlin; Fonseca,Inês Cristina de Batista; Montalván,Ricardo; Miglioranza,Édison. |
| The purpose of this work was to compare the SPD (Single Pod Descent) and SPDS (Single Pod Descent with Selection) methods for segregating generation advancement in soybean breeding. Sixteen populations derived from crosses among Japanese and adapted Brazilian soybean were used. The traits, number of days to flowering (NDF) and to maturity (NDM), plant height at flowering (PHF) and at maturity (PHM), and individual plant yield (IPY) were assessed. The populations obtained by SPDS showed values close to the variation in the populations obtained by SPD. Regression through the origin showed that both methods were equivalent for NDM in the F3 generation and for NDF in the F4 generation. For all other trait/generation combinations, SPDS yielded superior means.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Breeding methods; Food type soybean. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400008 |
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| Registros recuperados: 32 | |
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