Morphological phenotypic dispersion of garlic cultivars by cluster analysis and multidimensional scaling

AUTOR(ES)

Silva, Anderson Rodrigo da, Cecon, Paulo Roberto, Dias, Carlos Tadeu dos Santos, Puiatti, Mário, Finger, Fernando Luiz, Carneiro, Antônio Policarpo Souza

FONTE

Sci. agric. (Piracicaba, Braz.)

DATA DE PUBLICAÇÃO

2014-02

RESUMO

Multivariate techniques have become a useful tool for studying the phenotypic diversity of Germplasm Bank accessions, since they make it possible to combine a variety of different information from these accessions. This study aimed to characterize the phenotypic dispersion of garlic (Allium sativum L.) using two multivariate techniques with different objective functions. Twenty accessions were morphologically characterized for bulb diameter, length, and weight; number of cloves per bulb; number of leaves per plant; and leaf area. Techniques based on generalized quadratic distance of Mahalanobis, UPGMA (Unweighted Pair Group Method with Arithmetic Mean) clustering, and nMDS (nonmetrric MultiDimensional Scaling) were applied and the relative importance of variables quantified. The two multivariate techniques were capable of identifying cultivars with different characteristics, mainly regarding their classification in subgroups of common garlic or noble garlic, according to the number of cloves per bulb. The representation of the phenotypic distance of cultivars by multidimensional scaling was slightly more effective than that with UPGMA clustering.

Documentos Relacionados

• Multidimensional scaling analysis for investigating relations between milk yield and fertility parameters
• Morphological and chemical analysis of bone substitutes by scanning electron microscopy and microanalysis by spectroscopy of dispersion energy
• Phenotypic analysis of genes encoding yeast zinc cluster proteins
• Evolution of Mouse T-Box Genes by Tandem Duplication and Cluster Dispersion
• Evaluation of allicin stability in processed garlic of different cultivars