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| Siqueira,Marcos Vinicius Bohrer Monteiro; Borges,Aline; Valle,Teresa Losada; Veasey,Elizabeth Ann. |
| This study was carried out in order to assess the genetic diversity of 20 cassava (Manihot esculenta Crantz) genotypes with high phenotypic performance using microsatellite markers. Two groups were considered for this study: eleven varieties for industrial uses and nine for household consumption. By using nine microsatellite primers, high polymorphism was identified in all the loci analyzed, with values reaching 100%. On average, 3.4 alleles per locus were found, with 0.371 the value estimated for the observed heterozygosity and 0.555 for gene diversity for the entire set of varieties. The genetic variability found in both varieties, cultivated on a large-scale in the South Center region of Brazil, is wide enough to allow the choice of divergent parental... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Genetic diversity; Germplasm; Microsatellites. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052011000400003 |
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| Siqueira,Marcos V. B. M.; Queiroz-Silva,Jurema R.; Bressan,Eduardo A.; Borges,Aline; Pereira,Kayo J. C.; Pinto,José G.; Veasey,Elizabeth Ann. |
| Based on nine microsatellite loci, the aim of this study was to appraise the genetic diversity of 42 cassava ( Manihot esculenta ) landraces from selected regions in Brazil, and examine how this variety is distributed according to origin in several municipalities in the states of Minas Gerais, São Paulo, Mato Grosso do Sul, Amazonas and Mato Grosso. High diversity values were found among the five above-mentioned regions, with 3.3 alleles per locus on an average, a high percentage of polymorphic loci varying from 88.8% to 100%, an average of 0.265 for observed heterozygosity and 0.570 for gene diversity. Most genetic diversity was concentrated within the regions themselves ( H S = 0.52). Cluster analysis and principal component based scatter plotting... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic diversity; Microsatellites; SSR markers; Traditional farming. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000100015 |
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| Veasey,Elizabeth Ann; Silva,Jurema Rosa de Queiroz; Rosa,Mariana Silva; Borges,Aline; Bressan,Eduardo de Andrade; Peroni,Nivaldo. |
| The phenotypic diversity of sweet potato (Ipomoea batatas) landraces was assessed using morphological traits, verifying how this diversity is distributed among the households and settlements of the Vale do Ribeira, Brazil. A total of 74 accessions, involving 53 landraces, collected from 30 households distributed among 18 settlements that practice traditional agriculture in the municipalities of Iguape, Ilha Comprida, and Cananeia, as well as four commercial varieties acquired in markets of Iguape and Piracicaba, were evaluated under an ex situ experimental condition in Piracicaba, SP, Brazil. Nine phenological and floral descriptors, nine morphological vegetative aerial descriptors and five storage root traits were recorded. The 14 aerial vegetative and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Local varieties; Morphology; Phenotypic diversity; Traditional agriculture; Variability. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000400013 |
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| Veasey,Elizabeth Ann; Piotto,Fernando Angelo; Nascimento,Wellington Ferreira do; Rodrigues,Jucelene Fernandes; Mezette,Thiago Fonseca; Borges,Aline; Biguzzi,Felipe Almeida; Santos,Fernanda Raquel Camilo dos; Sobierajski,Graciela da Rocha; Recchia,Gustavo Henrique; Mistro,Julio César. |
| A evolução das plantas cultivadas, que teve início há cerca de 13.000 anos, está sujeita aos mesmos processos evolutivos naturais, aliada à ação do homem de forma consciente ou inconsciente, levando à domesticação. Nesta revisão, são apresentados os principais fatores evolutivos, tais como mutação, hibridação, migração, seleção e deriva genética, que, de alguma maneira, estão envolvidos com a origem, evolução e domesticação de plantas cultivadas. São apresentados também exemplos de como esses processos influenciaram na diversidade intra e interespecífica de plantas cultivadas, com o aparecimento de novas variedades ou mesmo de novas espécies. De modo geral, tais processos atuaram na ampliação, na manutenção, bem como na redução da variabilidade genética... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Domesticação de plantas; Mutação; Hibridação; Migração; Seleção; Deriva genética. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000700018 |
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