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- Title
Amostragem de acessos introduzidos e melhorados para composição de uma coleção núcleo de milho.
- Authors
Coimbra, Ronaldo Rodrigues; Miranda, Glauco Vieira; Cruz, Cosme Damião; da Silva, Derly José Henriques; Vilela, Ramiro Andrade
- Abstract
Aiming at the selection of accessions to compose a core collection of maize, were sampled access introduced and improved of Active Germplasm Bank at Embrapa Milho e Sorgo, located in Sete Lagoas, MG, Brazil. The sampling strategy was based in multivariate analysis, and adopted a sampling rate of 20% of accesses. Stratification of introduced accessions was in according with the country of origin, place of assessment and type of grain. For improved access was considered mainly the type of grain and the institution responsible for improvement of access. There is a need to perform the characterization and evaluation of many introduced and improved. It was possible to observe the existence of genetic variability among accessions. The plant height and thousand grain weight were the main contributors to the discrimination of genotypes. The combined use of the method of Tocher and as dissimilarity measure the Euclidian distance reversed and graphic dispersion analysis based on the first three principal components was effective. It was possible the selection of accessions to compose a core collection of maize based on multivariate analysis from the characterization and evaluation data.
- Subjects
BRAZIL; CORN research; PLANT germplasm; MULTIVARIATE analysis; PLANT growth; PARTICLE size determination
- Publication
Revista Ciência Agronômica, 2012, Vol 43, Issue 1, p184
- ISSN
0045-6888
- Publication type
Article
- DOI
10.1590/S1806-66902012000100023