Screening Potato Cultivars for Season Cropping by Reliable Methods at Ecological Conditions of Jiroft

Abstract

In order to investigate the effect of autumn and winter cropping on the growth analysis and tuber yield of different potato cultivars, a split-plot experiment was conducted in the form of a randomized complete block design in 3 replications in in 2019-2020 years. Cropping season in two levels (autumn and winter) was considered as the main factor and potato cultivars in 10 levels, including Concordia, Ottawa, Georgina, Ribera, Coronada, Colomba, Sylvana, Challenger, Atossa and Sante, were considered as sub factor. The results showed for first year, three main components were introduced, which justified 87.269% of the total variations and for second year, fourth main components were introduced, which justified 91.219% of the total variations. First component alone justified 56.154% of the total variance for (No. of nonmarketable tuber/plant, weight of non-marketable, weight percentage of non-marketable tuber and haulm dry weigh), the second component alone justified 20.658% for (dry matter content of tuber and total biomass), the third component 10.456% for (haulm dry weigh), of the relative variance. According to the regression coefficient, a change of one unit in Marketable yield, No. of nonmarketable tuber/plant, Weight of marketable tuber/plant, Weight of non-marketable tuber/plant, Weight percentage of non-marketable tuber, Haulm dry weigh, Total biomass, Biological yield, Biological yield and Harvest index at second year led to a by 0.4174, 0.5119, 0.0806, 0.4564, 0.39, 0.4296, 0.8449, 0.59, 0.2388 and 0.2685 units in first year.