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| Registros recuperados: 12 | |
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| Ghafouri-Kesbi,Farhad. |
| The aim of this study was to monitor changes in genetic size of a small-closed population of Iranian Zandi sheep, by using pedigree information from animals born between 1991 and 2005. The genetic size was assessed by using measures based on the probability of identity-by-descend of genes (coancestry, f, and effective population size, Ne), as well as measures based on probability of gene origin (effective number of founders, f e, effective number of founder genomes, f g, and effective number of non-founder genomes, f ne). Average coancestry, or the degree of genetic similarity of individuals, increased from 0.81% to 1.44% during the period 1993 to 2005, at the same time that Ne decreased from 263 to 93. The observed trend for f e was irregular throughout... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pedigree; Effective size; Genetic drift; Genetic diversity; Genetic similarity; Sheep. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400011 |
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| Collares,Eliana Antonia Silveira; Choer,Eva; Pereira,Arione da Silva. |
| The objective of this work was to characterize 27 potato genotypes, using molecular markers. Polyacrylamide gel electrophoresis, RAPD techniques and isozymes of esterase, phosphoglucomutase and soluble proteins were analyzed in tubers, and isocitrate dehydrogenase, aspartate transaminase, phosphoglucomutase and peroxidase, in leaves. Eighteen primers were tested and four were chosen, kits OPX (01, 04 and 09) and OPY (07), to analyze RAPD markers in leaf extracts. Similarity and cluster analysis were conducted using Jaccard coefficient and the unweighted pair-group method using arithmetic average. Despite the differences detected in the analysis of proteins and isozymes in the tubers, as well as of isozymes in the leaves, the characterization of all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum tuberosum; Electrophoresis; Isozymes; RAPD; Genetic similarity. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004000900006 |
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| Vieira,Elisa S.N.; Von Pinho,Édila V. de R.; Carvalho,Maria G.G.; Esselink,Danny G.; Vosman,Ben. |
| Microsatellite markers, also known as SSRs (Simple Sequence Repeats), have proved to be excellent tools for identifying variety and determining genetic relationships. A set of 127 SSR markers was used to analyze genetic similarity in twenty five Coffea arabica varieties. These were composed of nineteen commercially important Brazilians and six interspecific hybrids of Coffea arabica, Coffea canephora and Coffea liberica. The set used comprised 52 newly developed SSR markers derived from microsatellite enriched libraries, 56 designed on the basis of coffee SSR sequences available from public databases, 6 already published, and 13 universal chloroplast microsatellite markers. Only 22 were polymorphic, these detecting 2-7 alleles per marker, an average of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: SSR; Coffee; Genetic similarity; Molecular marker. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000300022 |
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| Oliveira,Luciana do Valle Rego; Faria,Ricardo Tadeu de; Ruas,Claudete de Fátima; Ruas,Paulo Maurício; Santos,Melissa de Oliveira; Carvalho,Valdemar P.. |
| In this work, RAPD molecular markers were used to access the genetic variability and to study the inter and intraespecifc relationship in a group of 37 species, including 56 individuals. A total of 15 RAPD primers were selected for DNA amplification. From a total of 221 bands analyzed, 209 (95%) were polymorphics. The level of interespecifc genetic similarity ranged from 37% between Catasetum complanatum and Catasetum laminatum to 83% between Catasetum triodon and Catasetum uncatum. The intraspecifc genetic similarity varied 88% for the individuals of Catasetum triodon to 93% between the individuals of Catasetum atratum and Catasetum macrocarpum. These results would contribute to understand the genetic relationship in Catasetum, to define the strategies to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Catasetum; Molecular marker; Orchid; RAPD; Genetic similarity. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000200017 |
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| Miranda,Zilda de Fátima Sgobero; Arias,Carlos Alberto Arrabal; Prete,Cássio Egidio Cavenaghi; Kiihl,Romeu Afonso de Souza; Almeida,Leones Alves de; Toledo,José Francisco Ferraz de; Destro,Deonisio. |
| The objective of this work was to estimate the coefficient of parentage and to understand the genetic structure of 90 elite soybean cultivars, which are adapted to different Brazilian environments. A total of 4,005 coefficients of parentage (f) were obtained and used to group the cultivars by UPGMA method. The constructed dendrogram showed several related cultivar groups which shared similar ancestors and clearly showed the genetic structure of the main Brazilian cultivars. Effective population sizes (Ne) were also estimated for cultivars in different generations. The average f = 0.2124 value, obtained from cultivars classified into four decades according to the release year, suggested effective soybean population sizes of 11 and 13 calculated using... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Effective population size; Genetic similarity; Parentage coefficient. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000300009 |
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| 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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| SANTOS, C. A. F.; LIMA NETO, F. P.. |
| Estimativas de similaridade genética entre 112 acessos de mangueira (Mangifera indica L.), de diferentes origens geográfi cas, estabelecidos no Banco de Germoplasma da Embrapa Semiárido foram obtidas com base em marcadores AFLP e microssatélites de forma a auxiliar atividades de melhoramento e manejo de recursos genéticos dessa espécie. O DNA dos acessos foi extraído de acordo com o protocolo CTAB 2x. Dendrogramas UPGMA foram gerados usando-se o coefi ciente de similaridade de Jaccard, com 50 alelos de 12 microssatélites e 157 amplicons AFLP de 13 combinações de primers EcoRI/ MseI. As correlações cofenéticas foram de 0,81, 0,80 e 0,94 para os dendrogramas de AFLP, microssatélites e AFLP + microssatélites, respectivamente. Quatro possíveis grupos foram... |
| Tipo: Folhetos |
Palavras-chave: Relações entre acessos; Acessos brasileiros; Melhoramento genético; Manga; Melhoramento Vegetal; Método de Melhoramento; Mangifera Indica; Mangoes; Genetic similarity. |
| Ano: 2018 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1103574 |
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| Registros recuperados: 12 | |
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