Investigation of genetic diversities for quantitative and qualitative traits in genotypes derived from Kennebec potato cultivar irradiation

In order to consider genetic diversities for quantitative and qualitative traits in genotypes derived from Kennebec potato cultivar irradiation from morphologic traits point of view an experiment in completely randomized block design with three replications in Agriculture and Natural Resources Research Station of Ardabil in agronomic year of 2012 was conducted. In this study the number of tubers per plant, tuber weight per plant, tuber yield (tons per acre), number of days to tuber creation, the average size of tuber, dry matter percent, plant height, number of main stems per plant were evaluated. In order to categorize the studied genotypes cluster analysis based on standardized data and WARD method was utilized. The resulted dendrogram was clustered in three groups. The third cluster consisted 22 genotypes for which all traits except number of main stems per plant and dry matter percent got positive deviations from the mean value. This cluster from tuber yield, tuber weight per plant, plant height and number of days to tuber creation took the highest average. Therefore to increase tuber yield, we can use superior genotypes of these clusters in hybridizations. Estimation of phenotypic and genotypic coefficients for different traits indicated that studied genotypes from tuber weight per plant, tuber yield, dry matter percent and mean tuber size point of view had greater genetic diversity than other traits. Therefore they can be used as selection criteria to improve yield.