GENOTYPE x ENVIRONMENT INTERACTION AND STABILITY ANALYSIS FOR HIGH YIELDING DOUBLED HAPLOID LINES OF LOWLAND RICE

This study was aimed at obtaining information on the effects of G x E interaction on yield among doubled haploid lines (DH) of lowland rice and to obtain stable and high yielding lines. The experiment was conducted in 9 environments (E), namely Indramayu (2018), Subang (2018), Malang I (2018), Malang II (2019), Blitar (2019), Cianjur (2019), Lombok (2019), Bali (2019), and Madiun (2019). A randomized complete block design with 3 replications was used in each location. The genotypes evaluated were fourteen doubled haploid rice lines and two check varieties namely Ciherang and Inpari 18. The results of the combined analysis of variance indicated significant effects of genotype (G), environment (E), and genotype x environment (G x E) interactions on grain yield. G1, G4, G9, G10, G11, G12, G13, and G14 DH lines had higher genotype mean yield than the average. Among those genotypes, the DH line of G9 was classified as high yielding, stable, and widely adapted in all locations based on Francis and Kannenberg, Finlay-Wilkinson, Eberhart-Russell, Kang, and AMMI analyses.