Analysis of variance used the General Linear Model (GLM) of the study variables by two factors, namely accession (cultivars) yam and dose irradiation gamma-ray (Gy) and their interactions on showed in (Table 2). The value of the F factor all accessions and gamma irradiation doses and their interaction greater of p-value which means there is a significant difference between the levels in the accession yam factor, gamma irradiation dose, and the interaction there is a significant effect on the variable duration of growth, stem diameter, number of tubers, tuber length, and tuber weight. Accession to the value of the F factor variable duration grows less than the value of the F factor gamma irradiation doses compared with other variables that stem diameter, number of tubers, tuber weight and tuber length. This indicates that the long time to grown plants larger yam influenced by gamma irradiation doses compared with accession factor. In contrast to variable stem diameter, number of tubers, tuber length and tuber weight factor many influence by of the irradiation dose.