Genotype x Environment Effects Elucidation of Wheat Genotypes Evaluated in Northern Hills Zone by AMMI, BLUP and Non Parametric Measures

Abstract

AMMI analysis of sixteen wheat genotypes evaluated at eight locations of northern hills zone revealed that significant environments, GxE interactions and genotypes contributed 44.8%, 30.9% & 8.9% respectively. Signal component of interactions accounted 87.91% of total interactions sum of squares. Values of IPCA1 pointed for G8, G2, G15 while G14, G10, G7 would be of choice as per IPCA-2. ASV1 measure while utilizing 58.5% of interactions recommended (G1, G8, G5) whereas (G1, G14, G5) pointed by ASV. Measures MASV1and MASV as per 97.4% of interactions settled for G10, G4, G5. BLUP based measures i.e. HMGV identified G10, G9, G16, while RPGV favored G9, G15, G6  and HMRPGV identified G9, G15, G6 wheat genotypes for this zone of the country. Suitability of G1, G10, G4  observed by NPi (1) measure whereas NPi(2) selected  G4, G12, G1 while NPi(3)  identified G4, G1, G12 and NPi(4) pointed for G1, G4, G12. Biplot analysis of measures found total 75.4% of accounted by first two principal components with with 43.2% & 29.2% contributions. BLStdev ASV MASV ASV1 MASV1 BLCV Si4 Si2, NPi (1) NPi (2) accounted for more share in first component while BLHM MHPRVG BLGM PRVG Mean BLAvg BLGM Si7 NPi (4) were major contributors in second one. Measures ASV, ASV1, MASV, MASV1, NPi(1), Si1, Si2, Si3, Si4, Si5, Si6, Si7  clustered in  biplot graphical analysis. Measures NPi(2), NPi(3), NPi(4) formed a cluster with  BLUP based measures Mean, BLAvg, BLGM, PRVG, MHPRVG.