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Registros recuperados: 7
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Anastomosis groups and molecular variation in Pseudocercospora griseola. Repositório Alice
SILVA, K. J. D. e; SOUZA, E. A.; FREIRE, C. N. S.; ISHIKAWA, F. H..
The fungus Pseudocercospora griseola is the causal agent of angular leaf spot, a common bean (Phaseolus vulgaris L.) disease. The successful development of angular leaf spot-resistant cultivars depends on understanding the levels of variability in pathogen populations. P. griseola shows great pathogenic and genetic variation using inoculation on differential bean cultivars and molecular markers. Nevertheless, how this variability develops is not clearly understood. Parasexuality has been presented as a mechanism used by asexual fungi to increase variation. Hyphal fusion is the first step for the parasexual cycle, and it can be considered an additional trait for population studies. The aim of this study was to identify hyphal fusion (anastomosis) among P....
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Feijoeiro comum; Ciclo parassexual; Mancha angular; Marcador molecular; Angular leaf spot; Common bean; RAPD markers; Parasexual cycle; Phaeoisariopsis griseola.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1030017
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Distância genética entre linhagens avançadas de germoplasma de algodão com uso de marcadores de RAPD e microssatélites. Repositório Alice
MENEZES, I.P.P. de; HOFFMANN, L.V.; ALVES, M.F.; MORELLO, C. de L.; BARROSO, P.A.V..
O objetivo deste trabalho foi selecionar coeficientes de similaridade para serem aplicados a conjuntos de genótipos de algodoeiro com baixa diversidade genética. Analisou-se um conjunto de 65 linhagens e 4 cultivares de algodão, com marcadores de RAPD e SSR, e estimou-se a similaridade genética de acordo com sete coeficientes de similaridade: Coincidência Simples, Rogers & Tanimoto, Ochiai, Hamman, Jaccard, Dice e Russel & Rao. A adequação dos coeficientes ao conjunto de genótipos foi verificada por correlação entre as matrizes de distância, índice de consenso entre os dendrogramas e otimização de Tocher. As análises mostraram que o coeficiente de Russel e Rao foi divergente em relação aos demais e seu uso não é recomendável. Entre os parâmetros...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Gossypium hirsutum; Diversidade genética; Marcadores RAPD; Marcadores SSR; Genetic diversity; RAPD markers; SSR markers.
Ano: 2008 URL: http://www.alice.cnptia.embrapa.br/handle/doc/122221
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Genetic diversity analysis of rice cultivars (Oryza sativa L.) differing in salinity tolerance based on RAPD and SSR markers Electron. J. Biotechnol.
Kanawapee,Nantawan; Sanitchon,Jirawat; Srihaban,Pranee; Theerakulpisut,Piyada.
Thirty rice cultivars were evaluated for salinity tolerance during the seedling stage and were divided into five tolerance groups including tolerant (T), moderately tolerant (MT), moderately susceptible (MS), susceptible (S) and highly susceptible (HS) which comprised 5, 10, 9, 4 and 2 cultivars respectively. Genetic diversity of all rice cultivars was evaluated using random amplified polymorphic DNA (RAPD) and simple sequence repeats (SSR) markers. The cultivars were evaluated for polymorphisms after amplification with 20 random decamer primers and 20 SSR primer pairs. A total of 161 RAPD markers and 190 SSR alleles were produced which revealed 68.94% and 89.47% polymorphism respectively. Mean genetic similarity coefficient was 0.82 for RAPD and 0.70 for...
Tipo: Journal article Palavras-chave: Genetic similarity; RAPD markers; Rice; Salinity tolerance; SSR markers.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000600002
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Proximal causes of genetic variation between and within populations of rauli (Nothofagus nervosa) Ciencia e Investigación Agraria
Carrasco,Basilio; Garnier,Maurice; Eaton,Lafayette; Guevara,Rafael; Carú,Margarita.
Random Amplified Polymorphic DNA(RAPD)markers were used to assess the genetic diversity of 587 individuals, belonging to 22 populations of Nothofagus nervosa that were distributed through the Coastal (38°S to 41 °S) and Andes Mountains in Central-Southern Chile (36°S to 40°S). The objective of this study was to complement the genetic inferences previously determined by isozyme analysis, in order to obtain more accurate genetic diversity estimations. We scored 81.8% of the polymorphic loci of the samples tested. The average incidence of genetic polymorphism within populations was high, with values ranging between 33% and 63%. Analysis of molecular variance (AMOVA) showed most of the genetic variation was distributed within populations (87.6%), but FST...
Tipo: Journal article Palavras-chave: Genetic structure; Nothofagus; RAPD markers.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000200007
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Selection of common bean segregating populations using genetic and phenotypic parameters and RAPD markers. Repositório Alice
MENDONÇA, H. A.; SANTOS, J. B. dos; RAMALHO, M. A. P..
In an attempt to identify strategies for choosing common bean segregating populations, the diallel parameters, the contribution of homozygous (m+a?) and heterozygous (d) loci, the heritability (h2a), the genetic distance (RAPD), and the selection potential (Z) were estimated in a study carried out in two stages. In the first, 30 hybrid combinations (partial diallel) were assessed in the F2 and F3 generations. Increasing grain yield was due dominance effect (d) although, both GCA and SCA were significant. d varied greatly and gave an information like SCA, however h2a alone was not indicative of success in a breeding program. In the second stage, five populations with lesser d and five with higher were selected, and twenty-seven families were taken from...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Parâmetro fenotípico; Marcador RAPD; RAPD markers; Melhoramento genético vegetal; Feijão; Phaseolus vulgaris; Parâmetro genético; Marcador molecular; Plant breeding; Beans; Genetic markers; Fitomejoramiento; Frijoles; Marcadores genéticos.
Ano: 2002 URL: http://www.alice.cnptia.embrapa.br/handle/doc/508871
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Somaclonal variation in Cereus peruvianus Mill. (Cactaceae): its potential to generate new varieties and broaden the species's genetic basis JBAG
Resende Gazoli,Adriana; Mangolin,Claudete Aparecida; Machado,Maria de Fátima.
In current study Random Amplified DNA-Polymorphism markers were used to detect genetic variations in C. peruvianus somaclones and to examine relationships among somaclones and plants grown from seeds in cultivated populations. The possible association of DNA fragments with morphological traits of somaclones was also investigated. Polymorphism in somaclones (62.24%) was higher than that detected in cultivated plants (42.57%). The casual grouping of somaclones presented atypical and typical shoot phenotypes showed that the random amplifi ed DNA-fragment polymorphisms detected in present study were not associated with shoot morphologies. Similarity in somaclones and cultivated plants ranged from 70.2 to 93.7% and 76.7 to 86.8%, respectively. Thus, in vitro...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cactus; Genetic diversity; Mandacaru; RAPD markers; Somaclonal variation.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332010000100004
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การประเมินความสัมพันธ์ทางพันธุกรรมของพลับในประเทศไทยด้วยเครื่องหมาย RAPD Thai Agricultural
Kriengsak Thaipong.
Special Problem (M.Sc. in Agriculture)
Tipo: PhysicalObject Palavras-chave: Persimmon; Diospyros kaki; Diospyros lotus; Diospyros glandulosa; Genetics; Genetics relationships; Cultivar identification; RAPD markers; Random amplified polymorphic dna; Evaluation; Thailand; พลับ; สายพันธุ์; พันธุกรรม; ความสัมพันธ์ทางพันธุกรรม; การจำแนกพันธุ์; เครื่องหมายทางพันธุกรรม; เทคนิคสุ่มขยายปริมาณชิ้นดีเอ็นเอ; ประเทศไทย.
Ano: 2002 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5495
Registros recuperados: 7
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