Investigating the important agronomic traits of selected hybrids produced of Savalan and Ceaser Cultivars by factors analysis

In order to categorize 20 selected potato hybrids derived from crossing Savalan (as female parent) and Ceaser (as male parent) varieties according to the evaluated traits, an experiment in Agriculture and Natural Resources Research Station of Ardabil in agronomic year of 2012 in completely randomized block design with three replications was conducted. In analyzing to the factors, three factors with high Eigen values were selected, where they consisted 78.44 percent of the main data variance. Based on the analyzing to the factors results, most of traits have a high coefficient of the same behaviors and the results show that the number of selected factors was appropriate to our aim and the selected factors have been able to justify and interpret the traits changes properly. The first factor have been able to explain about 44.497 percent of the main variables and in this factor, number of tubers per plant, tuber weight per plant, tuber yield, marketable tuber yield, dry matter percent and plant height were taken large and positive coefficients. Therefore this factor could be named as yield factor. The second factor explained and justified about 17.139 percent of the variations of the main data. Traits including day number till tuberization were affecting this factor and it was labeled as phonological traits affecting factor. The third factor was named as stem affecting factor. Simply, these three factors set one special trait in front of the other evaluated traits.