Abstract:
Sweet potatoes are rich in starch, beta-carotene and anthocyanins which are good for health and are generally used as a food substitute for rice. The aim of the study was to estimate the appearance and the genetic diversity of yield components and production of 8 local Papuan sweet potato clones from Jayapura Regency. The research was conducted for ± 5 months from March to August 2020, at the Manggoapi Research Farm, Faculty of Agriculture, and University of Papua Manokwari. The study was arranged in a randomized complete block design (RCBD) with treatment which consisted of 8 clones of local Papuan sweet potatoes from Jayapura, namely Koya 1, Koya 2, Koya 3, Koya 4, Koya 5, Koya 6, Koya 7 and Koya 8. Data collected were analysed by Anova, genetics variability (σ2g), phenotype variability (σ2f), heritability (h2), genetic varian coefficient (GVC), phenotype varian coefficient (PVC), expected genetic advance, principal component analysis, cluster analysis, biplot analysis and phenotypic correlation analysis. The results showed that the diameter, number, and weight of tuber per plants in general and economically as well as its number and weight per plot were significantly varied in tested genotype plants. The character of economic tuber number and economic tuber weight, as well as number of tubers and tuber weight per plot can be used as selection criteria. There is a genetic diversity among 8 local Papuan genotypes from Jayapura Regency, with the most contributed character is the economic tuber number. There was a significant positive phenotype correlation between tuber length, tuber weight per plant and tuber number per plot on plant yield.