Phenotypic variability among pumpkin accessions in the Brazilian semiarid

Horticultura Brasileira

Rita Mércia E Borges¹  Geraldo M De Resende¹  Maria Auxiliadora C De Lima¹  Rita De Cássia S Dias¹  Paloma Clementino Da C Lubarino¹  Regina Célia Da S Oliveira²  Nadja Pollyanna Da S Gonçalves¹ 

[1] ,Universidade de Pernambuco

关键词: Cucurbita moschata;    morphological descriptors;    genetic resources;    germplasm characterization;    fruit descriptors;    Cucurbita moschata;    descritores morfológicos;    recursos genéticos;    caracterização de germoplasma;    descritores de frutos;   

DOI  :  10.1590/S0102-05362011000400003

来源: SciELO

【 摘 要 】

The aim of this study was to estimate the phenotypic divergence among fourteen pumpkins accessions of the cucurbits Germplasm Active Bank of Embrapa Semiárido, in order to support breeding program to these species. Nine morphoagronomic descriptors were analyzed by the principal components and by UPGMA techniques. In the analysis of principal components, the formation of three contrasting clusters was observed, each one composed of two accessions. There occurred also the formation of one core group composed of five accessions, being the accessions called 683 and 684 collected in Bahia and the other in Maranhão. The most divergent accessions were 620, 624 and 748. The variables of the greatest contribution to the genetic divergence were diameter, weight and average length of the fruit. In the UPGMA analysis, obtained from the symmetric matrices generated by the Mahalanobis distance for the nine descriptors, there was the formation of one core group, composed of ten accessions, whose similarity was 45.71%, with geographically divergent accessions presenting the greatest similarity. Three accessions were not clustered with others. The study identified phenotypic variability for the analyzed characters and the absence of relationship between place of collection and phenotypic diversity.

【 授权许可】

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