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Variability and Association of Traits in Sweet Potato Ipomoea Batatas Accessions at Haramaya, Eastern Ethiopia

Melkam Mesenbet Asemie*, Wassu Mohamed Ali

Sweet potato (Ipomoea batatas (L.) Lam.) belongs to the convolvulaceae family. In Ethiopia, sweet potato has been cultivated for the last several years. By considering its prominence, it is important to increase its productivity through genetic manipulation. Thus, this study was undertaken, to estimate the extent of variability in accessions, heritability and genetic advance for yield and yield related traits. The experiment carried out 2014/2015 cropping season using 25 accessions with two released varieties. Randomized Complete Block Design (RCBD) with three replications where used. Data was collected on both plants and plot basis. The mean squares due to accessions were highly significant (p<0.01) for all traits studied, except storage root length (p<0.05) this indicates the existence of sufficient genetic variability among the accessions. For all characters PCV value greater than GCV but the two values different in narrow. PCV ranges (6.72% DPM-73.14% MSRY) and GCV ranges (5.12% DPM-66.72 AMSR). High PCV and GCV can offer opportunity for selection of superior genotypes with respect to character of interest. All the traits considered in the study exhibited high heritability ranged (13.79 GC-99.18% MSRY) it indicated additive and non-additive genetic variances with lesser influence of the environment.