to study the yield stability of new cereal, tritipyrum, with triticale lines and iranian bread wheat varieties using partitioning method of genotype × environment interactions

the new cereal, primary tritipyrum is a synthetic amphiploid derived from crossing between durum wheat varieties (triticum durum, 2n=4x=28, aabb) and wild coach grass species (thinopyrum bessarabicum, 2n=2x=14, ebeb). in this study the genotype × environment interaction effect containing change in rank and value for grain yield of seventeen genotypes including eight primary and combined primary of new wheat, tritipyrum lines, five triticale lines and four iranian wheat varieties was evaluated in a randomized completely block design with three replication in seven environment during growing seasons of 2002, 2006 and 2011 in three locations of iran (kerman, sirjan, neyriz) based on muir method. combined analysis of variance for grain yield showed significant differences between environments and genotype × environment interactions. based on muir criterion the highest and lowest percentage of changes in rank, were belonged to two wheat cultivars (omid and alvand) and two primary combined tritipyrum lines }(st/b)(cr/b)-4 and (ka/b)(cr/b)-6{, respectively, therefore (st/b)(cr/b)-4 tritipyrum line was indicated as the most stable and omid wheat cultivar were known as the most unstable genotype. on the base of change portion in rank of sum of square for interactions (86.67%), the m45 triticale line and (ka/b)(cr/b)-5 combined primary tritipyrum line were most stable genotypes with high yield, therefore, first, with complementary agronomical experiments may release a new grain crop of triticale and new pasture line of combined primary tritipyrum for forage., second, the combined tritipyrum line can be used in bread wheat improveing program for producing salt tolerant wheat cultivar/s in iran.