During this research the selected hybrid and open pollinated potato clones were evaluated in three regions including

Karaj, Hamadan and Ardabil of Iran. Quantitative and qualitative traits of the potato clones in the  eld experiments

were recorded and analyzed in comparison to the check potato cultivar Agria.

The results of combined analysis of places showed that among studied plant materials, 13 potato clones yielded

more than others and check cultivar. About half of these potato clones had the least un t tubers and their marketable

tubers yielded equal or more than 30 ton/ha. Most of potato clones with the highest marketable tuber were amongst

the superior ones in terms of the number of main stems. In this research, except for number of tuber per plant, other

traits signi cantly correlated with total and marketable yield. Interestingly, three potato clones among those with

third most important food crop after wheat and rice

(Haverkort et al., 2009). Potatoes were introduced into

Europe in the 1570s, from Andes region and coastal

Chile. After a short time, this crop became widespread

in whole Europe and beyond to other parts of the world

(Hawkes and Francisco-Ortega, 1993; Pandey and Kau-

shik, 2003). Despite many potato cultivars available in

different sites, introducing of new varieties with desir-

able traits have been considered as a prior goal by

Two basic steps are mentioned as premier ones in potato

breeding program: 1) selecting of superior parents for

crossing 2) selecting of derived clones with desirable

properties from segregating progenies (Gopal, 2015).

The  rst step in the plant breeding is creating a

population which contains suf cient variation in the

respected traits (Tabanao and Bernardo, 2005). The

variation between plant materials provides the effec-

tive selection. This variation could be created naturally

through open pollination or arti cially through hybrid

and quality traits (Macaso-Khwaja and Peloquin, 1983).

Many different factors are involved in the crossing

between parents of potato in the hybridization method.

These could be counted as  owering, incompatibility,

ploidy level, endosperm balance number, heterozygo-

sity, general combining ability and speci c combining

ability (Bonierbale, 2007; Muthoni et al., 2014; Gopal,

2015). The selection of parents depends on the objective

of breeding program. New techniques and approaches

prior knowledge about the outcome of the crosses. So,

for compensating this defect and maximizing the num-

ber of derived clones with good characters, the number

of cross combination should be increased (Grüneberg

et al., 2009).

Potato breeding in different countries could be divided

into four to  ve main steps, on the basis of national

potato breeding programin successive years. The includ-

2001; Clough et al., 2010). Multi-location variety trails

are generally done on the selected potato clones to eval-

uate their uniformity, qualitative and qualitative traits

and resistance to important regional diseases and pests.

Therefore, adaptability and stability of selected clones

are usually studied in locations with different environ-

mental condition in order to determining their capabili-

ties (Bradshaw et al., 2006; Bonierbale, 2007).

including Karaj, Hamadan, and Ardabil in Iran. The

experiment was conducted according to the randomized

complete block design (RCBD) with twenty one treat-

ments as clones and cultivar with three replications, in

height, number of main stems, growth habit and length

of growth period were recorded. Five plants in each plot

Hajianfar, Hassanpanah and Nosrati

physiological maturity which was indexed with natural

was done with Duncan test. The correlation among traits

in the experiment was done by the use of spearman rat-

ing method, and positive or negative type of correlation

Hajianfar, Hassanpanah and Nosrati

Hajianfar, Hassanpanah and Nosrati

able yield were among this group.

clones with the ranging of 100- 140 growth period.

ni cant correlation among total, marketable yield and

also plant height with the amount of - 0.230.

impact on the percentage of dry matter (table 4).

The effect of environment on quantitative and qualita-

mercial cultivars are more common in classical potato

three potato clones, all were superior to Agria.

sanabadi, 2014).

Hajianfar, Hassanpanah and Nosrati

e t of more photosynthetic capacity but also the stored

signi cant. Two potato clones including 1502 and 5504

potato clones.

stand higher with uniformity in growing (Hassanpanah

and Hassanabadi, 2014). These characters especially in

the beginning of growth stage were prominent for the

top potato clones.

One of the breeding traits which have considerable

importance in potato processing is dry matter content.

 nally less oil will be used for chips and french-fries

nineteen percent.

Two clones related to hybrid Ajax ×Kufri Jyotii and

one OP from Khorasan population had the highest con-

tent of dry matter. Interestingly the two hybrid clones

were amongst the superior clones in terms of marketable

superior in yield and dry matter have a growth period

mature potato.

6001,3503, 3504, 75013, 7508, 2508 with good agro-

nomical traits including high yield or dry matter and

suitable external quality traits such as cream or yellow

 esh color, round-oval shape, super cial eye and early

to mid-maturity were selected and could be used for

fresh or industrial consumption.

The authors are thankful to Director General of Seed and

Plant Improvement Institute in Karaj and President of

Agricultural Research Center in Ardabil and Hamadan

Hajianfar, Hassanpanah and Nosrati