VOLUME 14 NUMBER 2 (July to December 2021)

Aldrin Y. Cantila*^1,2 and Isagane V. Boholano¹

¹Philippine Rice Research Institute, Midsayap Experimental Station,
     North Cotabato, Philippines
²School of Biological Sciences, The University of Western Australia,
     Perth, WA Australia

The stability of high yielding hybrid rice varieties is very important to meet food security. The grain yield (GY) stability of 13 hybrid rice varieties in multi-environment with type IV climate condition (E1, E2, E3, and E4) was analyzed using genotype main effects and genotype x environment interaction (GGE). Combined analysis of variance showed environment and genotype by environment (GxE) interaction which accounts 45% and 28% of the total variation, respectively, as the main factors influencing the GY significantly (p < 0.005). GGE biplots were generated using the two interaction principal components (PC1 and PC2) which accounts a total of 92.4% of the GxE effect for GY. GGE biplot analysis identified best performing genotypes for a specific environment like M1 (Mestizo 1), M60 (PAC 801), and M55 (Mestizo 55) at E1 and E2, M60 and M6 (SL-8H) at E3, and M6 at E4. M1 was ranked as top 1, M60 as top 2, M6 as top 3, and M55 as top 4 in four tested environments with a mean GY of 7.48, 7.40, 6.93, and 6.86 t/ha, respectively. Therefore, M1, M60, M6, and M55 should be recommended to rice farm areas of SOCCSKSARGEN and other places in the Philippines with type IV climate condition such as Davao regions.