STABILITY AND ADAPTABILITY ANALYSIS IN SUGAR BEET VARIETIES FOR SUGAR CONTENT USING GGE-BIPLOT AND AMMI METHODS

Mohammad Nabi Ilkaei, Mohammadreza Orazizadeh, Abazar Rajabi, Khodadad Mostafavi

Abstract: The genotype and environment interaction effects is important for plant breeding and release of new cultivars. The aim of this study was to evaluate the stability and compatibility of cultivars for sugar content and estimation of the genotype × environment effects in sugar beet cultivars under different climates using GGE biplot and AMMI methods. In order to study the interaction of genotype with environment, nine sugar beet cultivars in a randomized complete block design with four replications was evaluated in 6 regions in 2016. In based on the results of AMMI analysis, the effect of environment, genotype and interaction between theirs was significant at 1% probability level. In this method, the first main component of the interaction was significant and alone explained 67.87% of the total variation. The AMMI1 graph showed that ARAS 101 and JAAM genotypes had high stability and AMMI2 graph showed that the JAAM genotype is the most stable genotype. The GGE biplot graph explains 90.57% of total variations. The graph of sugar content against stability for genotypes, showed that (I13 * A37.1) * SH-1-HSF.5 genotype is the best genotype for stability. The biplot graphical technique divided the tested areas into three megaenvironments and identified for each of the mega-environments different genotypes as stable genotypes. ARAS 101 genotype in the first mega-environment, BR1 genotype in the second, and (I13 * A37.1) * S1.88239, (I13 * KWS) * 302-HSF.20, 7233 genotypes in the third mega-environment had a high compatibility. The results of this study confi rmed that the sugar content in sugar beet genotypes was largely influenced by environmental factors.

Keywords: AMMI model; GGE biplot; mega-environment; stability; sugar beet

Date published: 2018-03-06