The study presents results of a three-year experiment of variability of
different potato varieties in Montenegro: early maturity varieties
(Riviera), medium early (Almera, Aladin and Bounty) and medium late (Agria,
Margarita, Kennebec and Desiree). The research was conducted during 2015,
2016 and 2017, in acid, brown soil and three different climatic locations:
Nedakusi (556 m a.s.l.), Sutivan (680 m a.s.l.) and Orahovica (900 m
a.s.l.). Field experiments were set up using standard methodology in random
block design in three repetitions. The analysis of variance suggest that
number of tubers per plant, mean tuber weight, yield of small tubers,
marketable and total yields were significantly fluctuating depending on
genotype (G), year (Y) and the location (L). In addition to individual
influences of different factors, their interactions were also pronounced (G
x Y, G x L, Y x L, G x Y x L). In the three-year period average, the highest
total yield was recorded in Nedakusi (31.41 t ha-1), followed by Sutivan
(21.35 t ha-1), while the lowest average yield (17.36 t ha-1) was recorded
in Orahovica. As expected, on the three-year average, the highest percentage
of dry matter was found in late varieties Agria - 25.46%, then Desiree -
25.33%, followed by Kennebec with 25.13%, while the lowest percentage of dry
matter was found in medium early variety Almera - 20.82%. The highest
average yield of tubers in the three-year period was recorded in the Aladin
variety, followed by Agria and Desiree, while the lowest average yield was
recorded in the variety Riviera. Obtained results show that the highest
yields over observed locations were recorded in medium early varieties that
formed high number of tubers per plant (Aladin) and medium late varieties
(Desiree and Agria) give satisfactory and stable yields.
