Use of Principal Coordinate Analysis for Measuring GE Interactions in Rain-Fed Durum Wheat Genotypes

Authors : Ali Asghari, Rahmatollah Karimizadeh, Rahim Chinipardaz, Omid Sofalian, Abdolali Ghaffari, Kamal Shahbazi, Tahmasb Hosseinpour, Hassan Ghojog, Mohammad Armion

Pages : 38-46

Doi:10.15832/ankutbd.538993

View : 18 | Download : 8

Publication Date : 2019-03-13

Article Type : Research Paper

Abstract :Genotype × environment interactions complicate selection of superior genotypes for narrow and wide adaptation. Multienvironment yield trials of twenty durum wheat genotypes were conducted at five locations of Iran insert ignore into journalissuearticles values(Gachsaran, Gonbad, Moghan, Ilam and Khorram abad); over four years insert ignore into journalissuearticles values(2009-2013);. Combined ANOVA of yield data of the twenty environments insert ignore into journalissuearticles values(year/location combined); revealed highly significant differences among genotypes and environments as well as significant genotype-environment interaction indicated differential performance of genotypes over test environments. The GE interaction was examined using multivariate analysis technique as principal coordinate analysis insert ignore into journalissuearticles values(PCOA);. According to grand means and total mean yield, test environments were grouped into two main groups as high mean yield insert ignore into journalissuearticles values(H); and low mean yield insert ignore into journalissuearticles values(L);. There were eleven H test environments and nine L test environments which analyzed in the sequential cycles. For each cycle, both scatter point diagram and minimum spanning tree plot were drawn. The identified most stable genotypes with dynamic stability concept and based on the minimum spanning tree plots and centroid distances were G12 insert ignore into journalissuearticles values(3342 kg ha-1);, G10 insert ignore into journalissuearticles values(3470.3 kg ha-1);, G5 insert ignore into journalissuearticles values(3203.0 kg ha-1);, and G1 insert ignore into journalissuearticles values(3263.5 kg ha-1);, and therefore could be recommended for unfavorable or poor conditions. Genotypes G10 insert ignore into journalissuearticles values(3470.3 kg ha-1); and G9 insert ignore into journalissuearticles values(3404.2 kg ha-1); were located several times in the vertex positions of high cycles according to the principal coordinates analysis insert ignore into journalissuearticles values(PCOA); and therefore could be recommended for favorable or rich conditions. Finally, the results of principal coordinates analysis in general confirmed the breeding value of the genotypes, obtained on the basis of the yield stability evaluation. 
Keywords : Adaptation, Eenvironment, Interaction, Ggenotype, Stability