Produção Nacional
Divergência genética entre genótipos de cana-de-açúcar
2011; UNIVERSIDADE FEDERAL RURAL DE PERNAMBUCO; Volume: 6; Issue: 1 Linguagem: Inglês
10.5039/agraria.v6i1a848
ISSN1981-1160
AutoresG.C. Silva, Francisco José de Oliveira, C.J. Anunciação Filho, Djalma Euzébio Simões Neto, Luiz José Oliveira Tavares de Melo,
Tópico(s)Natural Products and Biological Research
ResumoThe aim of this study was to evaluate the genetic divergence between seven standard-varieties and eleven RB (República do Brasil) sugarcane clones, by uni and multivariate techniques, based in ten agroindustrial characters. The experiment was developed in the agricultural area of Trapiche Sugar Mill – Sirinhaém, Pernambuco, Brazil, in the crop year 2005/2006. The experimental design was made in randomized blocks with four replications and eighteen treatments. Mahalanobis distance was used as dissimilarity measure. The hierarchical method of medium connections (UPGMA) and Tocher’s optimization method were applied. The results evidenced that the multivariate methodology make possible to identify genotypes of higher genetic divergence to use in sugarcane improvement programs. The best crossings options, considering divergence and yield, are between the clones RB992542 and RB992558 with the variety SP79-1011 and of the clone RB992558 with the variety RB92579. The characters apparent sucrose percentage contained in sugarcane juice, tons of sugarcane per hectare, apparent soluble solids contained in sugarcane juice percentage and stalk height were the major determinants in the quantification of genetic divergence.
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