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| Registros recuperados: 33 | |
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| Luz,José Magno Queiroz; Machado,Daniel Lucas Magalhães; Maciel,Gabriel Mascarenhas; Freitas,Joelson André de; Oliveira,Roberta Camargos de. |
| ABSTRACT The commercial use of onion hybrids is preferred by producers. In contrast, the production of hybrid onion seeds is extremely inefficient. This is due to the use of lineages obtained by successive self-fertilizations assuming the effect of inbreeding depression per se. Therefore, it is necessary to understand new alternatives to reduce the effect of inbreeding depression in the strains. The objective of this study was to evaluate possible differences in polymorphism and levels of heterozygosity of strains obtained from intercrossed and self-fertilized plants. Twelve onion populations belonging to Bayer’s breeding program (Granex, IPA-1, IPA-2 and IPA-3) were used, obtained by self-fertilization of one plant, intercrossing of two plants or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa; Hybrid; Onion polymorphism; Genotyping; Primers. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000300274 |
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| Lana, Maria do Carmo; UNIOESTE; Woytichoski Junior, Pedro Paulo; COPACOL; Braccini, Alessandro de Lucca; UEM; Scapim, Carlos Alberto; UEM; Avila, Marizangela Rizzatti; UEM; Albrecht, Leandro Paiola; UEM. |
| O objetivo deste trabalho foi avaliar a eficiência da redução do espaçamento entre linhas e do uso de diferentes doses de nitrogênio em cobertura, utilizando como fonte a ureia. Para tal, avaliou-se a produtividade, componentes da produção e outras características agronômicas da cultura do milho. O experimento foi instalado na Estação Experimental da Cooperativa Agrícola Consolata (Coopacol) no município de Cafelândia, Paraná, em área de Latossolo Vermelho eutroférrico, conduzido em sistema de semeadura direta. O delineamento experimental utilizado foi em blocos casualizados, com quatro repetições, dispostos em parcelas subdivididas. Os espaçamentos entre linhas (0,45; 0,75 e 0,90 m) foram testados nas parcelas e as doses de nitrogênio em cobertura (0; 30;... |
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Palavras-chave: 5.01.00.00-9 Agronomia Zea mays L.; Híbrido; Espaçamento; Ureia Zea mays L.; Hybrid; Spacing urea. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/788 |
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| Labarrère,Carla Rosa; Faria,Paulo Mário Carvalho de; Teixeira,Edgar de Alencar; Melo,Marília Martins. |
| Massive production, such as fish growing in water recirculation system, imposes challenges to animals capable of altering their homeostatic balance, and is able to affect their physiological performance. Therefore, the levels of ions and serum enzymes can be used as indicators of fish health. This study aimed to analyze the blood biochemistry profile of hybrid surubim (P. reticulatum X P. corruscans) submitted to different stocking densities in water recirculation system, in two distinct stages of production, from 150 to 400 g (first trial), and 400 to 1000 g (second trial). In the first trial, the five stocking rates were: 27.5, 47.5, 67.5, 87.5 and 107.5 fish/m³ of water. To obtain these densities, it was used 11, 19, 27, 35 and 43 fish per tank,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Hybrid; Plasma biochemistry. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000300008 |
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| Duke, N.C.; Ge, X.-J.. |
| The first putative hybrid tree species of the genus Bruguiera (Rhizophoraceae), B. × rhynchopetala, is reported from mangrove forests of China and Australia. It was described from China previously as a variety of B. sexangula. The hybrid is acknowledged as B. gymnorhiza × B. sexangula with parent species restricted to different parts of the Indo-West Pacific. The hybrid is recognised at north-eastern and south-eastern parts of the overlap area between parent distributions, but it appears absent in western parts. Further local assessments are needed across the range. Hybrid status is supported by: 1) intermediate and shared morphological characters; 2) distribution limited to areas of co-occurrence of B. gymnorhiza and B. sexangula; and 3) molecular... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Bruguiera × rhynchopetala; Hybrid; Indo-West Pacific; Mangrove; Morphometric; Rhizophoraceae. |
| Ano: 2011 |
URL: http://www.repository.naturalis.nl/record/524643 |
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| Strieder,Mércio Luiz; Silva,Paulo Regis Ferreira da; Rambo,Lisandro; Sangoi,Luís; Silva,Adriano Alves da; Endrigo,Paulo César; Jandrey,Douglas Batista. |
| Reduction in row spacing provides a more uniform distribution among plants that can increase grain yield. The benefits of narrow row spacing can depend on the plant architecture and on the kind of crop management system. The objective of this study was to assess the effects of narrow row spacing on the grain yield of maize hybrids growing under different management systems. Six experiments were carried out in Eldorado do Sul, State of Rio Grande do Sul, Brazil, during the 2003/04 and 2004/05 growing seasons. Each experiment corresponded to a crop management system. Treatments consisted of two row spacings (0.8 and 0.4 m), two hybrids (Penta and Flash) and two plant densities, which varied with the crop management system and growing season. Besides plant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Plant arrangement; Hybrid; Yield components; Fertility and irrigation levels. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000400004 |
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| Pozzobon,Marisa Toniolo; Machado,Ana Caroline de Carvalho; Vaio,Magdalena; Valls,José Francisco Montenegro; Peñaloza,Andréa del Pilar de Souza; Santos,Sileuza dos; Côrtes,Ana Luiza; Rua,Gabriel Hugo. |
| Chromosome numbers were counted in 126 new accessions of 50 Paspalum species from Brazil, Argentina, Paraguay and Bolivia. The chromosome numbers 2n=12, 20, 24, 30, 40, 50, 60, 80 were confirmed. Chromosome numbers for P. arenarium (2n=20), P. barretoi (2n=20), P. aff. ceresia (2n=40), P. corcovadense (2n=20), P. crispulum (2n=20), P. flaccidum (2n=40), P. nummularium (2n=20), P. scalare (2n=20), P. vescum (2n=20) and P. rectum (2n=20) and a diploid cytotype of P. malacophyllum are reported for the first time. The predominance of tetraploid accessions (43.6%) was confirmed, but an unusually high number of diploid species (44%) and accessions (35.7%) was found. These results open new perspectives for breeding programs, phylogenetic studies, and for research... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chromosome; Diploid; Polyploid; Ploidy level; Hybrid; Genetic resources. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000500014 |
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| De Grazia,Javier; Tittonell,Pablo Adrián; Salvador Perniola,Omar; Caruso,Ariel; Chiesa,Angel. |
| The advantages of transplanting with respect to direct sowing has been widely reported in several vegetable species, but there are few studies in Cucurbits, and even fewer in summer squash (Cucurbita maxima (Carr.) Millán var. zapallito). Morphological and physiological characteristics of hybrid varieties determine earliness of between 5 to 10 days compared to traditional cultivars. The aim of the study was to compare the summer squash setting systems, direct sowing and nursery seedlings, and to determine their effect on yield and earliness in different genotypes. The hybrid varieties F1 Angelo and Espejo, and the standard varieties Any and Any Plus were used combined with two setting systems (direct sowing and nursery seedlings). Male and female flowering... |
| Tipo: Journal article |
Palavras-chave: Transplant; Direct sowing; Hybrid; Variety; Yield. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072005000200002 |
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| Onbaşılar,EE; Güngör,ÖF; Demir,T; Erbay,FK Elibol; Kahraman,M; Taban,S; Çalık,A; Pirpanahi,M. |
| ABSTRACT Layer hybrids are more superior in the egg yield than pure breeds. But this superiority causes some problems in the bones during the production period. There are a lot of differences among genotypes in the production period that have been examined extensively, however, the differences throughout incubation period aren’t known yet. Thus, the objective of this study was to evaluate the differences in femur properties of pure breed and layer hybrid embryos during the incubation period. A total of 354 fresh hatching eggs were used from one hybrid (Lohman White) and two pure breeds (Denizli & Gerze). The eggs were incubated. Hatching eggs from each genotype at the beginning of embryonic days (E) 19 and E21 were examined. At these embryonic ages, 12... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Layer; Pure breed; Hybrid; Embryo; Femur. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000400805 |
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| 本江, 昭夫; HONGO, Akio. |
| In the Himalayas, domesticated yak is fed at an altitudinal range of 3,000 to 5,000m. Below this zone, the cow is more common. Hybrids are fed at an intermediate zone. In order to analyze the genetic basis of milk protein variation, milk samples were taken from the nak (female yak), cow and their hybrid. By principle component analysis, yak and a highland type of cow (kirmcome) were clearly distinguished from midland (shakzam) and lowland (palang) cows. Local Sherpa people may produce suitable animals for each zone by controlling animal reproduction systems. Generally speaking, a sustainable stocking rate is two adult animals per hectare in the central Himalayas. However, most pastures were overgrazed 3 to 10 times more than this level. The feedstuff... |
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Palavras-chave: Cow; Fodder tree; Hybrid; Stocking rate; Yak; ウシ; 飼料木; 雑種; 放牧圧; ヤク. |
| Ano: 1996 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3006 |
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| Silva,Dreid de Cerqueira Silveira da; Martins,Márcio Lacerda Lopes; Santos,Ariana Silva; Santos,Vanderlei da Silva; Alves,Alfredo Augusto Cunha; Ledo,Carlos Alberto da Silva. |
| Abstract: The objective of this work was to evaluate the crossability between cassava (Manihot esculenta subsp. esculenta) cultivars and the subspecies M. esculenta subsp. flabellifolia and M. esculenta subsp. peruviana. Plants from the BRS Jari, BRS Formosa, BRS Verdinha, and BGM 2050 (Equador 72) cultivars were crossed with the two subspecies. During flowering, at pre-anthesis, pistillate flowers were covered with a nylon bag and staminate flowers on the same inflorescence were emasculated. The staminate flowers were collected and placed in flasks previously labeled and sterilized with alcohol; some fresh flowers were stored at room temperature due to asynchronous flowering. The crosses were made between 10 a.m. and 2 p.m. After pollination, the flowers... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Controlled pollination; Hybrid; Plant breeding; Wild relative species. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000200182 |
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| Registros recuperados: 33 | |
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