Saeed Sadeghzadeh Hemayati(1), Abazar Rajabi*(1), Mohammadreza Orazizadeh(1)
(1). Sugar Beet Seed Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran.
(* Corresponding author: Dr. Abazar Rajabi: E-Mail: rajabi@sbsi.ir).
Received: 18/04/2017 Accepted: 19/07/2017
Abstract
The present study focused on estimating yield stability of sugar beet cultivars in Iran. The data were collected from pilot studies on imported and domestic cultivars. Twenty-one cultivars of sugar beet were compared in 12 main spring growing regions of Iran in 2014, in randomized complete block design, with three replications. The effect of location and cultivar was significant (P≤0.05) on root yield. Among the cultivars, Pauletta and Fernando had the highest root yield (75.8-80.5 t/ha), followed by SBSI034 and BTS 335 (70 t/ha), whereas Canaria, Rasta, Torbat, Novodoro, Tucan, Morly, Aria, Pars, Antec, Nagano, Rosier, Iris, Flores, Boomrang, Sanetha, and Ekbatan had the lowest root yield (56.2-67.2 t/ha). The significance of location × cultivar interaction (P≤0.05) showed that cultivars did not have uniform performance at different locations. Estimation of different stability parameters revealed that Fernando, Pauletta, SBSI-034 and BTS-335 had high root yield and stability, while Boomrang, Iris, Isabella, Morly, Novodoro, Rasta, and Rosier were found to be cultivars with low yield and stability. Pars, Torbat, Iris, Flores, Morly, Ekbatan, BTS-335, Canaria, Antec, and Rosier displayed moderate stability. The estimation of the reliability of root yield for different cultivars at different levels of agriculture development indicated that Pauletta, Fernando, SBSI-034, TBS-335 and Aria had higher reliability than the other cultivars under both modern and subsistence farming conditions.
Keywords: Location × cultivar interaction, Sugar beet, Stability, Root yield.
Full paper in English: PDF