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Search Results: 1 - 10 of 2701 matches for " Prunus spp "
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Efeito do comprimento de estacas herbáceas de dois clones de umezeiro (Prunus mume Sieb & Zucc.) no enraizamento adventício
MAYER, NEWTON ALEX;PEREIRA, FERNANDO MENDES;NACHTIGAL, JAIR COSTA;
Revista Brasileira de Fruticultura , 2002, DOI: 10.1590/S0100-29452002000200044
Abstract: the japanese apricot (prunus mume sieb & zucc.) is a rosaceae of falling leaves, native of china, whose fruits and flowers are quite appreciated by the oriental people. in brazil, some studies were accomplished seeking its use as rootstock for peach and nectarine trees, due its adaptation characteristics, rusticity, reduction of the plant load and compatibility with some cultivars of prunus persica. the present study were carried out under intermitent mist inside a lathhouse, belonging to the vegetal department of the faculdade de ciências agrárias e veterinárias (fcav/unesp), campus of jaboticabal, s?o paulo state. the objective of this study was to verify the influence of four lengths of herbaceous cuttings in the rooting of two japanese apricot clones. the vegetable material, identified as clone 10 and clone 15, was originating from the genetic improvement program of the instituto agron?mico de campinas, sp. the experiment was constituted by a 2 x 4 fatorial in randomized blocks, having the factor clone 2 levels (clone 10 and clone 15) and the factor cuttings length 4 levels (12, 15, 18 and 25cm). for the observed results, differences was only verified among the clones in the sprouted cutting percentage and number of roots for cutting. the rooting percentage and the mortality of the cuttings were influenced by the cutting lenght, meanwhile, larger cuttings tended to present higher rooting and smaller mortality percentages. the cuttings with 12cm, although presenting few roots number for cutting, they are recommended for allow the obtention of a higher number of cuttings for main plant. there was significant effect of the interaction between the factors for number and length of roots.
Chilling requirement for seed germination and phenological observations on peach cultivars Necessidade de frio para estratifica o das sementes e observa es fenológicas em cultivares de pessegueiro
Américo Wagner Júnior,Claudio Horst Bruckner,José Osmar da Costa Silva,Carlos Eduardo Magalh?es dos Santos
Revista Ceres , 2013,
Abstract: In subtropical climate areas, the models and methods proposed to evaluate the chilling requirement of temperate fruit crops often do not provide satisfactory results, thus calling for the development of alternative techniques. The aim of this study was to evaluate the correlations between some phonological traits and chilling requirement for seed germination of 18 peach cultivars and one nectarine cultivar. Two experiments were installed separately for the correlation studies. In experiment 1, the phenological traits were observed in the field, while in experiment 2, the chilling requirement for 50 and 100% seed germination of each cultivar was assessed. The number of days for beginning of bloom (r = 0.70**, 0.61**) and full bloom (r = 0.72**, 0.76**) were both significantly correlated with the number of chilling units for 50% and 100% germination of seeds. The number of days for beginning of budding and dormancy break were both significantly correlated with the number of chilling units for 50% and 100% germination (r = 0.48*, 0.50*, respectively). However, the same significant effect for these phenological traits was not found between chilling units and 50% germination of seeds, as well as between chilling units and harvest dates. Em regi es de clima subtropical, os modelos e métodos propostos para avalia o da necessidade de frio das fruteiras de clima temperado n o apresentam, muitas vezes, resultados satisfatórios. Isto demonstra a necessidade do desenvolvimento de alternativas para se estimar a necessidade de frio dessas plantas. Este trabalho teve como objetivo analisar as correla es entre os dados fenólogicos e a necessidade de frio das sementes de 18 cultivares de pessegueiro e um cultivar de nectarineira. Para realiza o dos estudos de correla o, foram realizados dois experimentos, separadamente, sendo o primeiro por acompanhamento das características fenológicas em campo e, o segundo, com o estudo da necessidade de frio acumulado, para germina o de 50 e de 100% das sementes, de cada cultivar. Houve correla o significativa entre o número de dias necessários para o início do florescimento (r = 0,70**, 0,55*) e plena flora o (r = 0,72**, 0,73**) e o número de unidades de frio acumulado, para germina o de 50 e de 100% das sementes estratificadas. O número de dias para o início da brota o e fim da dormência apresentou correla o significativa com o número de unidades de frio acumulado, para 50 e 100% de germina o (r = 0,48*, 0,50*, respectivamente). Entretanto, o mesmo efeito significativo nestes dados fenológicos n o foi observado para o n
Crescimento de três clones de umezeiro (Prunus mume Sieb. et Zucc.) e pessegueiro cv. Okinawa (Prunus persica (L.) Batsch.) propagados por estacas herbáceas
Mayer, Newton Alex;Pereira, Fernando Mendes;
Revista Brasileira de Fruticultura , 2004, DOI: 10.1590/S0100-29452004000100031
Abstract: mume (prunus mume sieb. et zucc.) presents promising characteristics for use as rootstock for peach and nectarines trees, however, when adopted the sexual propagation, it results in very heterogeneous plants, as a function of the mume's great genetic variability. three clones (clones 05, 10 and 15), selected from plants grown in the esta??o experimental de jundiaí (iac), s?o paulo state, brazil, propagated vegetatively and maintained in fcav/unesp, jaboticabal campus, have been object of several studies to make possible the agronomical use of these materials. the present study had for objective to evaluate the growth of three mume clones and 'okinawa' peach propagated by herbaceous cuttings. the rooted cuttings were transplanted for plastic bags, maintained in nursery conditions and evaluated (stem diameter and length) up to 145 days. the mume clones 05, 10 and 15 presented continuous growth with relationship to stem length, while 'okinawa' peach stabilized growth 100 days after transplant, reflecting in lower plants. differences don't exist among the mume clones studied in stem diameter after 100 days and stem length after 115 days of rooted cuttings transplant. 'okinawa' peach presents larger stem diameter in relation to mume clones 05, 10 and 15, what defines larger percentage of capable rootstocks for accomplishment of graft.
RAPDs na caracteriza??o genético-molecular e no estudo da variabilidade genética de cultivares de ameixeira
Bianchi, Valmor Jo?o;Fachinello, José Carlos;Schuch, Márcia Wulff;
Revista Brasileira de Fruticultura , 2003, DOI: 10.1590/S0100-29452003000200022
Abstract: molecular markers have been used thoroughly in many fruit crops species for fingerprinting analysis during the vegetal material certification process, and as an auxiliary tool in breeding programs to access genetic variability among genotypes. the plum is an important crop in southern brazil. the present paper aims to contribute for the genetic-molecular characterization of 17 plum cultivars, which were analyzed with 12 rapd markers that produced 187 polymorphisms. the op a20 marker was the most polymorphic, producing 26 different profiles. the cluster analysis was represented by a dendrogram using the upgma method, and showed a clear cultivar separation in to three groups corresponding to the species, prunus salicina, prunus domestica and prunus cerasifera, respectively. a high degree of polymorphism was detected by the rapd markers in the plum. this confirms the potential of the techanique of fingerprinting analysis and its usefulness in the estimate of the genetic variability among plum cultivars.
Identification of Peach Genotypes (Prunus persica (L.) Batsch) in the North-Central Region, Mexico
C.M. Melgoza Villagomez,H. Silos Espino,A. Nava Cedillo,L.L. Valera Montero
International Journal of Botany , 2009,
Abstract: Twenty four peach genotypes from the Central North Region of Mexico, were characterized based on morpho-physiological traits. Fruit weights from the genotypes Roxana (135 g), San Gabriel C-167 (141.9 g) and Zacatecas landrace (162.3 g) were the higher, each in its group, since all genotypes were grouped according to their readiness to harvest as early-, middle- and late-harvest, respectively. RAPDs analysis yielded 52 monomorphic and 93 polymorphic fragments that were related to desirable characteristics from the Prunus genotypes. This information provide us tools for early individual identification of high-performance trees when still growing in the nursery. Therefore, growers may use this technique for assisted breeding program on their Prunus genotypes.
RAPDs na caracteriza o genético-molecular e no estudo da variabilidade genética de cultivares de ameixeira
Bianchi Valmor Jo?o,Fachinello José Carlos,Schuch Márcia Wulff
Revista Brasileira de Fruticultura , 2003,
Abstract: Marcadores moleculares têm sido amplamente utilizados nas mais variadas espécies frutíferas para análise de "fingerprinting", para o processo de certifica o de material vegetal e como ferramenta auxiliar em programas de melhoramento genético, para acessar a variabilidade genética entre genótipos. Dado a importancia da cultura da ameixeira para a regi o Sul do Brasil, o presente trabalho teve por finalidade contribuir para a caracteriza o genético-molecular de 17 cultivares. As cultivares foram analisadas com 12 marcadores RAPD, que produziram 187 polimorfismos. O marcador OP A20 foi o mais polimórfico, produzindo 26 perfis diferentes. A análise de agrupamento, realizada com o método UPGMA, produziu um dendrograma que permitiu uma clara separa o das cultivares em três grupos, correspondentes às suas respectivas espécies, Prunus salicina, Prunus domestica e Prunus cerasifera. O alto grau de polimorfismo detectado pelos marcadores RAPD confirma o potencial da técnica na análise de "fingerprinting" e sua utilidade na estimativa da variabilidade genética entre cultivares de ameixeira.
Dehydrogenase isoenzyme polymorphism in genus Prunus, subgenus Cerasus
?oli? Slavica,Rakonjac Vera,Fotiri?-Ak?i? Milica,Nikoli? Dragan
Genetika , 2012, DOI: 10.2298/gensr1203619c
Abstract: Dehydrogenase polymorphism was studied in 36 sour cherry (Prunus cerasus L.), sweet cherry (Prunus avuim L.), mahaleb (Prunus mahaleb L.), ground cherry (Prunus fruticosa Pall.), duke cherry (Prunus gondounii Redh.), Japanese flowering cherry (Prunus serrulata Lindl.) and four iterspecific hybrids (standard cherry rootstocks ‘Gisela 5’, ‘Gisela 6’, ‘Max Ma’ and ‘Colt’). Inner bark of one-year-old shoots, in dormant stage, was used for enzyme extraction. Vertical PAGE was used for isoenzyme analysis: alcohol dehydrogenase (ADH), formate dehydrogenase (FDH), glutamate dehydrogenase (GDH), isocitrate dehydrogenaze (IDH), malate dehydrogenase (MDH), phosphogluconate dehydrogenase (PGD), and shikimate dehydrogenase (SDH). All studied systems were polymorphic at 10 loci: Adh -1 (3 genotypes) and Adh-2 (5 genotypes), Fdh-1 (2 genotypes), Gdh-1 (3 genotypes), Idh-1 (4 genotypes) i Idh -2 (5 genotypes), Mdh-1 (3 genotypes), Pgd-1 (4 genotypes), Sdh-1 (1 genotype) i Sdh-2 (3 genotypes). Cluster analysis was used to construct dendrogram on which four groups of similar genotypes were separated. Obtained results indicate that studied enzyme systems can be used for determination of genus Prunus, subgenus Cerasus. Among studied enzyme systems ADH, IDH and SDH were the most polymorphic and most useful to identify genetic variability. Polymorphism of FDH and GDH in genus Prunus, subgenus Cerasus was described first time in this work. First results for dehydrogenase variability of Obla inska indicate that polymorphism of loci Idh-2 and Sdh-2 can be useful for discrimination of different clones.
Efeito do comprimento de estacas herbáceas de dois clones de umezeiro (Prunus mume Sieb & Zucc.) no enraizamento adventício
MAYER NEWTON ALEX,PEREIRA FERNANDO MENDES,NACHTIGAL JAIR COSTA
Revista Brasileira de Fruticultura , 2002,
Abstract: O umezeiro (Prunus mumeSieb & Zucc.) é uma rosácea de folhas caducas, nativa da China, cujos frutos e flores s o muito apreciados pelos povos orientais. No Brasil, alguns estudos foram realizados visando a sua utiliza o como porta-enxerto para pessegueiro e nectarineira, dadas as suas características de adapta o, rusticidade, redu o do porte da planta e compatibilidade com algumas cultivares de Prunus persica. O presente estudo foi conduzido em camara de nebuliza o sob ripado, pertencente ao Departamento de Produ o Vegetal da FCAV/UNESP, Campus de Jaboticabal-SP. Objetivou-se verificar a influência de quatro comprimentos de estacas herbáceas no enraizamento de dois clones de umezeiro. O material vegetal, identificado como Clone 10 e Clone 15, foi oriundo do Programa de Melhoramento Genético do Instituto Agron mico de Campinas-SP. O experimento foi constituido de fatorial 2 x 4, em blocos casualizados, sendo o fator clone em 2 níveis (Clone 10 e Clone 15) e o fator comprimento de estaca em 4 níveis (12; 15; 18 e 25cm). Pelos resultados observados, verificou-se diferen a entre os clones somente na porcentagem de estacas brotadas e número de raízes por estaca. O comprimento da estaca influenciou na porcentagem de enraizamento e na mortalidade das estacas, sendo que estacas maiores tenderam a apresentar maiores porcentagens de enraizamento e menores de mortalidade. As estacas com 12cm, embora apresentando menor número de raízes por estaca, s o recomendadas por permitirem a obten o de um maior número de estacas por planta-matriz. Houve efeito significativo da intera o entre os fatores para número e comprimento de raízes.
A Programme for the Management of Forest Tree Genetic Resources in the Azores Islands
Ferreira,Miguel; Eriksson,G?sta;
Silva Lusitana , 2006,
Abstract: since few forest tree gene conservation activities have been carried out in the azores islands with its unique flora, it is urgent to develop a strategy for the management of the azorean forest tree genetic resources. safeguarding the potential for adaptation was identified as the prime objective for gene conservation of tree species in the azores. three species were identified of potential interest for tree genetic improvement. prunus lusitanica spp azorica was selected due to its rarity and is close to extinction. piconia azorica and juniperus brevifolia spp azorica were selected based on their high wood quality and the interest in these trees by the azorean forest service. combined gene conservation and breeding was suggested for these species. the breeding of all of these species will follow the multiple population breeding system concept. open-pollinated seed will be collected for establishment of seedling seed orchards for each ecogeographic zone (cf figure 4). culling of trees with undesired characteristics will be carried out before seed collection. seeds will be used for establishment of new progeny plantations. for prunus lusitanica spp azorica only 1-2 seedling seed orchards are suggested. for the two other species several seedling seed orchards are suggested. for tree species not included in the breeding programme, in situ subpopulations are recommended. they should cover the entire range of distribution of these tree species. whenever two or more species coexist, combined gene resource populations could be used to reduce the cost for conservation. promotion of flowering by cutting competing tree species should be carried out to guarantee regeneration of the gene resource populations. supportive research for the management program is urgently needed.
Frutifica??o, características físicas de frutos e produtividade em cultivares e sele??es de pessegueiro em Vista Alegre do Alto-SP
Pereira, Fernando Mendes;Mayer, Newton Alex;
Ciência Rural , 2008, DOI: 10.1590/S0103-84782008000600009
Abstract: the jaboticabal micro-region, located in s?o paulo state, brazil, considered unsuitable for peach tree culture, presents important comparative advantages in relation to other traditional regions producing peach in brazil, as the reduced frost incidence, low air relative humidity and hidric deficit between april and september, beyond precocious production possibility (august to october), which has remunerated satisfactorily the fruit growers. however, the research results are consistent only to 'aurora-1' peach. aiming to consolidate this micro-region as a new peach production pole of high quality, the present research was conducted in vista alegre do alto, s?o paulo state, and had the objective to study the fruiting, physical fruit characteristics and productivity of 'aurora-1' and 'régis' cultivar, and 'jab 484' and 'jab 694' peach selections. with the evaluations carried through in 2nd and 3rd years after transplant (2005 and 2006 harvests), it was possible to conclude that: a) the fruiting of 'régis' and 'aurora-1' cultivars and 'jab 484' and 'jab 694' peach selections is satisfactory in normal climatic conditions in vista alegre do alto, s?o paulo state, brazil; b) 'régis' peach tree presents production and productivity equivalent to 'aurora-1', becoming an option for ultraprecocious production of double purpose fruits, despite its fruits being smaller and lighter than 'aurora-1' peach, 'jab 484' and 'jab 694' peach selections; c) 'jab 484' and 'jab 694' peach selections present potential in vista alegre do alto, s?o paulo state, presenting fruits with double purpose characteristics, being heavier than 'aurora-1' peach, being able to reach production and productivity equivalent to this cultivar.
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