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Development of a Brazilian maize core collection
Coimbra, Ronaldo R; Miranda, Glauco V; Cruz, Cosme D; Silva, Derly J. H; Vilela, Ramiro A.
  • Coimbra, Ronaldo R; Universidade Federal do Tocantins. Centro Universitário de Porto Nacional. Porto Nacional. BR
  • Miranda, Glauco V; Universidade Federal de Viçosa. Viçosa. BR
  • Cruz, Cosme D; Universidade Federal de Viçosa. Viçosa. BR
  • Silva, Derly J. H; Universidade Federal de Viçosa. Viçosa. BR
  • Vilela, Ramiro A; Embrapa Milho e Sorgo. Sete Lagoas. BR
Genet. mol. biol ; 32(3): 538-545, 2009. ilus, tab
Article in English | LILACS | ID: lil-522317
ABSTRACT
The aim of this study was to evaluate methods for developing a Brazilian maize core collection. For an initial survey of the active collection, passport information, as well as characterization and evaluation of accessions, were taken into consideration, these then being divided according to geographic region and kernel-type. Multiple sampling methods were evaluated. The strategy of constant sampling generated extensive alterations in extract accession frequency. The multivariate strategy with dispersion graphs and principal components associated with the Tocher method was considered efficient for identifying the most divergent genotypes. The multivariate strategy generated greater alterations in the variance of traits. The average number of traits revealed few modifications with the various sampling strategies used. Therefore, the active collection could be considered as possessing a satisfactory amount of information for most of its accessions. Moreover, the multivariate strategy generated modifications in the variance of the traits, independent of sampling intensity.
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Full text: Available Index: LILACS (Americas) Main subject: Genetic Variation / Zea mays Country/Region as subject: South America / Brazil Language: English Journal: Genet. mol. biol Journal subject: Genetics Year: 2009 Type: Article Affiliation country: Brazil Institution/Affiliation country: Embrapa Milho e Sorgo/BR / Universidade Federal de Viçosa/BR / Universidade Federal do Tocantins/BR

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Full text: Available Index: LILACS (Americas) Main subject: Genetic Variation / Zea mays Country/Region as subject: South America / Brazil Language: English Journal: Genet. mol. biol Journal subject: Genetics Year: 2009 Type: Article Affiliation country: Brazil Institution/Affiliation country: Embrapa Milho e Sorgo/BR / Universidade Federal de Viçosa/BR / Universidade Federal do Tocantins/BR