اثر متقابل ژنوتيپ x محيط و پايداري عملكرد دانه ارقام اميدبخش كيفي برنج

Genotype x Environment interaction and stability of grain yield in the qualitative promising rice cultivars

Stability of ten pre-release rice cultivars (genotypes) were determined by sowing them in Randomized Complete Block Design (RCBD) with 4 replications at 3 locations (Rasht, Roudsar and Masai) and three consecutive years (2004-2006). In current study, traits such as grain yield, panicle number, 100-grain weight, plant height, panicle length, days to maturity, amylose content, gelatinization temperature, gel consistency and total rice recovery were measured. Combined analysis over all the three locations and years revealed high significant differences for studied genotypes. The genotype * location * year (GxLxY) interaction was significant for all characters. Stability analysis revealed that promising line No 6 (IR75479-199-3-3) is the most stable genotype, since it showed the lowest coefficient of variation and mean square within each of the location. This stable high yielding cultivar with moderate amylase content is comparable with Iranian traditional land races. There fore it is suitable for releasing as a new cultivar for Guilan province conditions.