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| Registros recuperados: 837 | |
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| VALENTE,Mágno Sávio Ferreira; LOPES,Maria Teresa Gomes; CHAVES,Francisco Célio Maia; OLIVEIRA,Ariane Mendes; FREITAS,Diego Rodrigo Bilby de. |
| ABSTRACT Repeatability allows an estimation of the number of evaluations needed to optimize the selection of superior genotypes, with consequent effects on the research costs in terms of financial and human resources. The objective of this study was to estimate the coefficient of repeatability of biometric and yield traits, related to fruits and seeds of sacha inchi (Plukenetia volubilis), and to define the number of evaluations required for an efficient selection and evaluation of genotypes of the species. A total of 37 non-domesticated accessions were evaluated for 19 months in a randomized block design with 5 replications and 2 plants per plot. The total number of fruits, total number of seeds, total fruit weight, mean fruit weight, and number of seeds... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding; Accuracy; Selection efficiency; Plukenetia volubilis L.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672017000300195 |
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| SILVA,Ana Carla Carvalho; BARROS,Adriana Fernandes de; MENDONÇA,Flávia Maria Fernandes; GAMA,Kamyla Fernanda da Silva; MARCOS,Rebeca; POVH,Jayme Aparecido; FORNARI,Darci Carlos; HOSHIBA,Márcio Aquio; ABREU,Janessa Sampaio de. |
| ABSTRACT Tambaqui, Colossoma macropomum, is one of the most produced species in Brazilian fish farming, which has boosted the development of new technologies to increase its productivity. The aim of this study was to evaluate production performance in two second-generation tambaqui stocks selectively bred for weight gain in a semi-intensive rearing system and assess its influence on total production cost. We analyzed 300 fish (initial mean weight and standard length of 160 g and 17 cm, respectively) of two families (A and B, 150 fish each). The fish were individually marked with microchips and stocked in an 800-m2 excavated pond. For economic analysis, the obtained performance data were extrapolated for a fish farm with a 10-ha pond, adopting the Total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture productivity; Breeding; Fish farming; Production cost; Native Brazilian fish. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000200108 |
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| Barros,José de Ribamar Silva. |
| A selection of queens of Melipona scutellaris through the most productive colonies were carried out during eight months in an orange honeyflow. Each of the colonies was evaluated by its production, that is, the gross weight production ( pollen, brood, geopropolis and wax of each hive). With this data a coefficient of repeatability was estimated by the intraclass correlation method, obtained r = 0.835 ± 0.071. The repeatibility is very high showing that the analysed data (production) is repeatable. Selection was then carried out using the regression coefficient of each colony and the respective production gain. Using these data the colonies were divided into three groups according to the method Vencovsky and Kerr (1982): a with the colonies of highest... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding; Selection; Melipona; Bee. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672006000100014 |
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| Pipolo, Valéria Carpentieri; UEL - Londrina; Souza, Agnelo de; UEL - Londrina; Silva, Daiana Alves da; UEL - Londrina; Barreto, Thales Pereira; UEL - Londrina; Garbuglio, Deoclécio Domingos; IAPAR; Ferreira, Josué Maldonado; UEL - Londrina. |
| Com o advento da agricultura moderna, as sementes crioulas foram, em geral, substituídas por cultivares híbridos, com elevado potencial produtivo, porém mais dependentes de insumos e tecnologias intensivas. O objetivo deste trabalho foi avaliar variedades de milho crioulo, de forma a identificar materiais mais produtivos e que propiciem o processo sustentável no qual os próprios grãos possam ser utilizados como semente. Foram avaliadas 15 variedades de milho crioulo, tendo como testemunhas as cultivares comerciais BR 106 e IPR 114. Os experimentos foram conduzidos em Arapongas e Imbaú, Estado do Paraná, durante o ano agrícola de 2004/2005, sem a utilização de insumos externos. O delineamento utilizado foi o de blocos casualizados com quatro repetições. As... |
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Palavras-chave: Zea mays L.; Variedades locais; Melhoramento Zea mays L.; Landraces; Breeding. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/430 |
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| Vasconcelos, Ubieli Alves Araújo; Dias, Luiz Antônio dos Santos; Corrêa, Thais Roseli; Rosmaninho, Lucas Barbosa de Castro; Silva, Dandara Rêgo Muniz da; Zaidan, Iasmine Ramos. |
| Crambe is an oilseed plant producing oil that can be used for various industrial purposes, including the production of biofuel. It is a short-cycle, non-food plant that can be grown as a second crop following soybean or corn crops and using the same agricultural machinery. This work aimed to estimate genetic parameters and correlations between traits of genotypes grown for two years in seven locations in two Brazilian states. The cultivar FMS Brilhante and the lines CR 1101, CR 1102, CR 1105, CR 1202, CR 1303, and CR 1304 were used. The traits evaluated were grain yield (YD), plant height (PH), stem diameter (SD), first fruiting branch height (BH), 1,000-seed weight (SW), and number of branches (NB). The correlations between traits were identified from the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding; Biofuels; Oleaginous plants; Brassicaceae breeding; Biofuels; Oleaginous plants; Brassicaceae. |
| Ano: 2020 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42490 |
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| Garbuglio, Deoclecio Domingos; IAPAR; Miranda Filho, José Branco; USP; Cella, Marcos; USP. |
| Os objetivos do presente trabalho se dirigem ao estudo da variabilidade genética em sete populações de milho de ampla base genética, visando ao melhoramento de populações. Os experimentos foram instalados em blocos casualizados em um local (Anhembi, Estado de São Paulo) com famílias S1 de sete populações (GO-D: dentado, GO-F: flint, GO-L: espiga longa, GO-G: espiga grossa; e compostos G3, G4 e GO-S). Foram estimadas a variância genética entre médias de famílias, a variância fenotípica entre médias de famílias e o coeficiente de herdabilidade (sentido amplo) para médias de famílias. As estimativas de herdabilidade foram altas para peso de espigas (0,89 a 0,94), comprimento da espiga (0,77 a 0,88) e diâmetro da espiga (0,77 a 0,92), e menores para altura da... |
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Palavras-chave: 5.01.00.00-9 Agronomia Zea mays L.; Melhoramento; Seleção recorrente Melhoramento Vegetal Zea mays L.; Breeding; Recurrent selection. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/790 |
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| Malta, Marcelo Ribeiro; EPAMIG; Chagas, Sílvio Júlio de Rezende; EPAMIG. |
| O presente trabalho teve como objetivo avaliar os teores de trigonelina, ácidos clorogênicos (5-ACQ) e cafeína em grãos de diferentes cultivares de cafeeiro (Coffea arabica L.). As cultivares avaliadas foram coletadas na Fazenda Experimental da Epamig em Lavras, Estado de Minas Gerais, no ano agrícola de 2005/2006. O delineamento experimental utilizado foi um inteiramente casualizado constando de oito cultivares de café com três repetições. Foram avaliadas as cultivares: Oeiras MG 6851, Acaiá Cerrado MG 1474, Catuaí Vermelho IAC 99, Rubi MG 1192, Topázio MG 1190, Mundo Novo IAC 379/19, Catucaí Amarelo 2 SL e Catuaí Amarelo IAC 62. Após a colheita dos cafés por derriça manual no pano, estes foram lavados e submetidos ao processo de descascamento e... |
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Palavras-chave: 5.01.03.04-0 Produção de Mudas Coffea arabic; Melhoramento; Composição química; Ácido clorogênico; Cafeína; Trigonelina. Coffea Arabica; Breeding; Chemical composition; Chlorogenic acids; Caffeine; Trigonelline. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6629 |
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| Martuscello, Janaina Azevedo; Braz, Thiago Gomes dos Santos; Jank, Liana; Cunha, Daniel de Noronha F. V. da; Lima, Bruno Patrick da Silva; Oliveira, Leandro Pereira de. |
| The experiment aimed at determining repeatability coefficients for four methods (analysis of variance, principal components-correlation and covariance matrices and structural analysis), number of harvests necessary to increase accuracy and phenotypic stability of yield characteristics of accessions of Panicum maximum. The experiment was conducted in a completely randomized design with 35 genotypes and three replications. Five cuts were made and material was weighed and dried to obtain total, stem, leaf and dead forage dry matter yields. The repeatability coefficients in the different methods, for the evaluated characteristics, ranged from 0.1867 and 0.6583. The estimates of repeatability coefficients obtained for the evaluated characteristics by analysis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.04.04.04-0 determination coefficients; Forages; Breeding. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/23206 |
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| Milosevic,Tomo; Milosevic,Nebojsa. |
| In situ selection of vineyard peach (Prunus pérsica spp. vulgaris Mill.) genotypes was conducted in 2006 and 2007 in the region of Kfusevac (Central Serbia). Identification, observation and recording of the phenological and pomological properties of the highest-quality genotypes were carried out. Twenty-eight genotypes of the highest quality were selected out of 2093 genotypes, based on biological and pomological properties, and compared to those of cv. Redhaven (control). The onset of flowering varied (April 7-21), being early in two genotypes and late in one genotype, as compared to Redhaven, while 25 genotypes showed an intermediate flowering date, as Redhaven did. Campanula flowers were found in six genotypes, as in Redhaven, and the rosaceous type in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding; Flowering; Fruit and stone; Genetic diversity; Genotype. |
| Ano: 2010 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952010000300005 |
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| Pavlovic,Martin; Pavlovic,Viljem. |
| Hops (Humulus lupulus L.) ate vital fot the brewing industry, as they contribute significantly to the organoleptic qualities of beet, including taste and flavor. Experimental hop breeding data from the Slovenian Institute of Hop Research and Brewing (IHPS) were used to create a model based on the multi-attribute decision modeling methodology. The model has 18 attributes hierarchically grouped within four main attributes: Biology, Chemistry, Morphology and Brewing value. Furthermore, utility functions in the model were defined by sets of elementary decision rules throughout the entire hierarchy for all aggregated attributes. The central part of the model contains 144 decision rules, which were specified according to the model users' previous breeding... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hop industry; Breeding; Decision-making; Model; IHPS. |
| Ano: 2011 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952011000300007 |
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| Fracasso,Hélio A.A.; Branco,Joaquim O.. |
| Sterna hirundinacea (Lesson, 1831) is a migratory seabird that breeds in the Pacific Coast (from Peru to Chile) and along the Atlantic coast of South America from Espírito Santo (Brazil) to Terra del Fuego (Argentina). This paper describes the reproductive success of South American Terns on Cardos Island, Florianopolis, Brazil in the breeding seasons of 2003, 2005 and 2006. The colony was formed in mid-May in 2003 and early April in other years, with the total number of nests ranging from 1,852 in 2006 to 2,486 in 2005. Hatching success was estimated at 76.39% in 2006, 62.73% in 2003 and 41.1% in 2005, the lowest value that could be attributed to predation by hawks Caracara plancus, lizards Tupinambis merianae and black vulture Coragyps atratus. The chicks... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding; Reproductive success; South American Terns; Brazil. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000200021 |
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| CHAVES,FLAVIA G.; VECCHI,MAURICIO B.; LAURINDO,THIAGO F.S.; ALVES,MARIA ALICE S.. |
| We describe the nest, eggs, and nestlings of the Restinga Antwren (Formicivora littoralis), an endangered bird of Restinga ecosystem (sandy coastal plain vegetation) that is endemic to Rio de Janeiro state. Twelve nests were found at the edges of trails or natural gaps at Massambaba Restinga region, in different supporting plants and heights from the ground (X ± SD 1.27 ± 0.97 m, range 0.27 to 3.45 m). Nests were cup-shaped and were in horizontal forks attached to branches at three to five points with whitish, soft, and thin cotton-like vegetable fiber. The nests' cup shape and measurements were similar to congeneric species, but nest material was different. Eggs were white with brown spots concentrated on the large end or around the middle, giving the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Forest; Brazil; Breeding; Conservation; Endemic; Passeriformes. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200547 |
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| Salinas-Rios,T.; Ramírez-Godínez,J.A.; Rodríguez-Almeida,F.A.; Hernández-Bautista,J.; Torres-Salado,N.; Herrera-Pérez,J.. |
| ABSTRACT Profitability of sheep production depends on the reproductive response of ewes and growth of their lambs, which can be improved through the ram genotype. The aim of this study was to evaluate the reproductive response of Blackbelly (Bb), Pelibuey (Pb), Katahdin (Kat) and Dorper (Dor) ewes crossed with Damara (Dam) and Dor rams and the growth of their offspring. To measure percentage of single and multiple lambings (MLP), 234 Bb, Pb, Kat and Dor ewes were used. To measure lamb growth, the offspring of 86 Bb x Pb (BbPb) ewes and 73 Kat x Dor (KatDOR) ewes were used. Four Dor x BbPb, six Dam x BbPb and six Dam x KatDor lambs were slaughtered for carcass assessment. MLP was analyzed with the CATMOD procedure considering the factors age and breed. Lamb... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lambs; Breeding; Weaning; Ewes; Lambing. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000200429 |
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| Montag,Luciano Fogaça de Assis; Freitas,Tiago Magalhães da Silva; Raiol,Roberta Dannyele de Oliveira; Silva,Marlene Vasconcelos da. |
| This paper describes the length-weight relationship, size at first maturation (L), and breeding season of Poecilia reticulata found in drainage channels on the campus of the Federal University of Pará (UFPA) in the Brazilian city of Belém. A total of 1.936 specimens (942 males and 994 females) were collected in monthly samples of the study area between June, 2006, and March, 2007. Females were significantly longer and heavier than males. The length-weight relationship for males was established by the equation Pt = 5 × 10-5 × Ct2.397 and for females by Pt = 3 × 10-6 × Ct3.419. The estimated value of L was 17.5 mm for males and 20.4 mm for females, suggesting that males initiate reproductive activity at a smaller size than females. The abundance of mature... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish ecology; Urban environments; Breeding; Amazon; Poecilia reticulata. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300007 |
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| Motta-Junior,José Carlos; Granzinolli,Marco Antonio Monteiro; Monteiro,Alberto Resende. |
| Sixteen opportunistic field observations of eight species of Brazilian raptors (Falconiformes and Strigiformes) are reported here as a contribution to the knowledge of the natural history of these poorly studied birds in Brazil. The observations are related to the food habits (Buteo albicaudatus, Herpetotheres cachinnans, Milvago chimachima, Falco femoralis), reproduction (Asio stygius, Megascops choliba), mobbing behaviour elicited in other birds (Geranospiza caerulescens, H. cachinnans, F. femoralis, A. stygius, Athene cunicularia) and a rare case of leucism in owls (A. cunicularia). |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Falconiformes; Strigiformes; Food habits; Breeding; Mobbing behaviour; Leucism; Brazil. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000400042 |
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| Fracasso,Hélio Augusto Alves; Branco,Joaquim Olinto; Barbieri,Edison. |
| Cabot's Terns Thalasseus acuflavidus (Latham, 1737) are widely distributed along the Atlantic coast of South America from the Caribbean Islands (12º S) to the region of Porto Deseado, Argentina (46º S). Daily observations were conducted on the Cardos Island during 2003, 2005 and 2006 to determine timing and nesting success, and the reproductive biology of the Cabot's Terns nesting there. The first adults arrived at the colony from 22 April to 15 May during the three years recorded; a total of 144 nests were recorded in 2003, 174 in 2005 and 50 in 2006. Observed incubation time was 24.1 ± 0.35 days, and mean egg size was 5.15 ± 0.02 cm in length and 34.30 ± 0.25 g in weight. Hatching success was lowest in 2003 and highest in 2006, with natural causes (such... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding; Cabot's Terns; Brazil; Conservation; Reproductive success. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300005 |
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| Registros recuperados: 837 | |
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