Genebanking and diversity analysis of sweet potato (Ipomoea batatas) collections in Cordillera Region [Philippines]
2010
Gonzales, I.C. | Beligan, .SA., Benguet State Univ., La Trinidad, Benguet 2601 (Philippines)
One hundred ninety five sweetpotato accessions collected from the Cordillera region were characterized using the CIP's International Plant Genetic Resources descriptor's list to determine the phylogenetic relationship of the sweetpotato collections. Qualitative data include: predominant vine color, secondary vine color, vine tip pubescence, general outline of the leaf, leaf lobe type, leaf lobe number, shape of central leaf lobe, abaxial leaf vine pigmentation, mature leaf color, immature leaf color, peptide pigmentation, predominant skin color, intensity of predominant skin color, secondary skin color, predominant flesh color, secondary flesh color, distribution of secondary flesh color and maturity. Quantitative data include: number and weight of marketable and non-marketable roots and total weight of roots. The hierarchical clustering analysis particularly the Word's method was employed to easily determine the grouping where the accessions belong so that the sweetpotato strains in the same cluster are more or less alike than elements in different clusters. Thus, the resulting clusters shall exhibit high internal homogeneity (within luster and high external heterogeneity between clusters). It showed that sweetpotato collections significantly differed on the quantitative data which include the number of marketable roots, weight of non-marketable roots and total weight of roots. Significant results for the qualitative data include: the general outline of the leaf, predominant skin color, intensity of predominant skin color and the secondary skin color. All other characters did not differ significantly.
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