Anestesia local em cirurgias orificiais

Dias, Lúcio Antonio Garcia; Neto, Juvenal da Rocha Torres; Menezes, Marcel Vinícius Aguiar de; Menezes, Jorge Gontran Torres de

doi:10.1590/s1516-31802005000700003

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2007

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“…The global maize stocks that have been shrinking uninterruptedly over the last 5 years already reflect the increased demand (Dias 2005). The development of improved varieties with high yield potential can be seen as a possibility to increase production.…”

Section: Introductionmentioning

confidence: 99%

Selection index and molecular markers in reciprocal recurrent selection in maize

Tardin¹,

Pereira

Gabriel³

et al. 2007

CBAB

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-Reciprocal recurrent selection among full-sib families is one of the outstanding methodologies of maize improvement, since gains are possible in the per se and/or in cross populations. Here the selection index proposed by Smith and Hazel was used in the cited methodology; besides, an additional phase involving RAPD markers was introduced to preserve the genetic variability of the selected genotypes and identify contaminants before their recombination. Multivariate techniques of grouping and discriminant analyses were used for this purpose, to assure the continuance of the improvement program and amplify the genetic distance between the populations Cimmyt and Piranão, which were used for an intervarietal hybrid. The molecular technique proved useful to identify contaminants and helpful in the choice of the genotypes to be recombined to maximize heterosis among populations. The technique can be included in recurrent selection programs, mainly those that target the development of hybrids.

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Section: Introductionmentioning

confidence: 99%