INVESTIGADORES
SEIJO Jose Guillermo
congresos y reuniones científicas
Título:
Cluster and principal component analysis of a morphological dataset from herbarium specimens of Arachis hypogaea L. originally collected in 9 countries at the centres of diversities in South and Central America. 9
Autor/es:
ROYO, O; TAIE, A.; J. G. SEIJO
Lugar:
Córdoba
Reunión:
Congreso; 9th International Conference of the Peanut Research Community on Advances in Arachis through Genomics and Biotechnology (AAGB-2017); 2017
Institución organizadora:
International Peanut Genome Initiative
Resumen:
Thirty-two morphological data from different vegetative and reproductive organs were gathered from 149 herbarium specimens representing a diversity of accessions of Arachis hypogaea L. at IBONE (Instituto de Botánica del Nordeste), Corrientes, Argentina, in the herbarium collection of Arachis developed by Antonio Krapovickas. Two countries of Central America and seven countries of South America were represented.Phenetic analyses identified three main clusters: one group comprising the five accessions of variety hirsuta and two accessions of var. peruviana; a second cluster comprising all the accessions of variety hypogaea and the third grouped accessions of varieties fastigiata, vulgaris, peruviana and aequatoriana. Principal Component Analysis displayed three principal components that explained 58 % of total variation. The original characters that most weighted on CP1 were the length and volume of the seeds; on CP2 were the length and volume of the fruits and the relations of the length to the width and deepness of the fruits and the average number of seeds per fruit. CP3 gave weight to the width and deepness of the seeds and of the fruits, the beak of the fruits, and the relations of the length to width and to deepness of fruits as well as the relations of the length to the width and deepness of the seeds. The results evidence that the accessions of the variety hirsuta showed a significant morphological divergence from those of all the other varieties, and, although more data is needed, suggest a revision of the taxonomic status of the variety.
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