Divergência genética entre acessos e cultivares de mamoneira por meio de estatística multivariada

Mauro Nóbrega da Costa; Walter Esfrain Pereira; Riselane de Lucena Alcântara Bruno; Eleusio Curvelo Freire; Márcia Barreto de Medeiros Nóbrega; Máira Milani; Ademar Pereira de Oliveira

doi:10.1590/S1678-3921.pab2006.v41.7324

Genetic divergence on castor bean accesses and cultivars through multivariate analysis

Authors

Mauro Nóbrega da Costa Federal University of Paraíba
Walter Esfrain Pereira Federal University of Paraíba
Riselane de Lucena Alcântara Bruno Federal University of Paraíba
Eleusio Curvelo Freire Embrapa Algodão
Márcia Barreto de Medeiros Nóbrega Embrapa Algodão
Máira Milani Embrapa Algodão
Ademar Pereira de Oliveira Federal University of Paraíba

DOI:

https://doi.org/10.1590/S1678-3921.pab2006.v41.7324

Keywords:

Ricinus communis, genetic variation, cluster, multivariate analysis

Abstract

This work aimed to evaluate genetic divergence among castor bean (Ricinus communis L.) cultivars, in order to enable the choice of parents which make the formation of segregating populations possible. Accesses BRA 4871, BRA 2968, BRA 5550 and BRA 7722 Papo-de-gia, and cultivars BRS 188 Paraguaçu, BRS 149 Nordestina, IAC-80, Mirante-10 and Pernambucana Melhorada were evaluated. Characteristics analyzed were: days to flowering, number of racemes per plant, length of pistillate region of main raceme, plant height, potential yield, and seed oil content. The genetic divergence among accesses and cultivars was studied by multivariate analysis techniques, with canonical variables and cluster analysis, making use of mean euclidean distance. Two groups were formed: group I, formed by eight genotypes; and group II, formed by one genotype, cultivar Mirante-10. In spite of being the more divergent, cultivar Mirante-10 should not be recommended for hybridization due to its low medium performance. The other cultivars also presented restrictions, as they were quite similar. The variables that more contributed to the genetic divergence were: days to flowering, length of pistillate region of main raceme, plant height, and seed oil content.

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Published

2006-11-01

Issue

v.41, n.11, nov. 2006

Section

GENETICS

How to Cite

Costa, M. N. da, Pereira, W. E., Bruno, R. de L. A., Freire, E. C., Nóbrega, M. B. de M., Milani, M., & Oliveira, A. P. de. (2006). Genetic divergence on castor bean accesses and cultivars through multivariate analysis. Pesquisa Agropecuaria Brasileira, 41(11), 1617-1622. https://doi.org/10.1590/S1678-3921.pab2006.v41.7324

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