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AMMI analysis of yield performance in canola (Brassica napus L.) across different environments

Sayed Saeid Rahnejat, Ezatollah Farshadfar, Ahmad Ali Mohammadi

Department of Agronomy and Plant Breeding, Islamic Azad University, Kermanshah Branch, Kermanshah, Iran

Department of Plant Breeding, Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran

Kermanshah Agricultural Research Center

Key words: Canola, Genotype, Environment interaction, AMMI, Stability.


Ammi-4In order to explore the effect of genotype, environment and genotype × environment interaction (GEI) on grain yield of 15 canola genotypes in four different environments, an experiment was conducted in a randomized complete block design with 3 replications during 2013-2014 growing seasons. Combined analysis of variance exhibited that grain yield was significantly (p<0.01) affected by environments (E), genotypes (G) and genotype × environment interaction (GEI) indicating the presence of genetic variation and possible selection of stable entries. AMMI analysis revealed that the first and second interaction principal component (IPCA1 and IPC2) explained 65.11% and 19.64% of the G×E variation, respectively. According to AMMI1 biplot, G2, G3, G4, G5, G7, G8, G11, G12, G13, G15, and G14 with grain yield less than mean indicated specific adaptation for E1 and G1, G6 and G10 for E1, E2 and E3. Distribution of genotypes in the AMMI II biplot displayed that genotypes, G2, G5, G13 and G15 scattered close to the origin, indicating minimum G×E interaction and hence stability. The remaining 11 genotypes scattered away from the origin in the biplot indicating that the genotypes were more sensitive to environmental fluctuations.


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