Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/963983
Research center of Embrapa/Collection: Área de Informação da Sede - Artigo em periódico indexado (ALICE)
Date Issued: 2013
Type of Material: Artigo em periódico indexado (ALICE)
Authors: MEZETTE, T. F.
BLUMER, C. G.
VEASEY, E. A.
Additional Information: Thiago Fonseca Mezette, Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Genética; Caroline Groppo Blumer, Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Genética; Elizabeth Ann Veasey, Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Genética.
Title: Morphological and molecular diversity among cassava genotypes.
Publisher: Pesquisa Agropecuária Brasileira, Brasília, DF, v. 48, n. 5, p. 510-518, maio 2013.
Language: en
Notes: Título em português: Diversidade morfológica e molecular entre genótipos de mandioca.
Keywords: Diversidade genética
Microssatélite
Morphological traits
Genetic diversity
Microsatellites.
Description: The objective of this work was to characterize morphologically and molecularly the genetic diversity of cassava accessions, collected from different regions in Brazil. A descriptive analysis was made for 12 morphological traits in 419 accessions. Data was transformed into binary data for cluster analysis and analysis of molecular variance. A higher proportion of white or cream (71%) root cortex color was found, while flesh colors were predominantly white (49%) and cream (42%). Four accession groups were classified by the cluster analysis, but they were not grouped according to their origin, which indicates that diversity is not structured in space. The variation was greater within regions (95.6%). Sixty genotypes were also evaluated using 14 polymorphic microsatellite markers. Molecular results corroborated the morphological ones, showing the same random distribution of genotypes, with no grouping according to origin. Diversity indices were high for each region, and a greater diversity was found within regions, with: a mean number of alleles per locus of 3.530; observed and expected heterozygosity of 0.499 and 0.642, respectively; and Shannon index of 1.03. The absence of spatial structure among cassava genotypes according to their origins shows the anthropic influence in the distribution and movement of germplasm, both within and among regions.
Thesagro: Germoplasma
Manihot Esculenta.
NAL Thesaurus: Germplasm
Genetic variation.
Data Created: 2013-08-13
Appears in Collections:Artigo em periódico indexado (AI-SEDE) / Embrapa Informação Tecnológica (SCT)

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