Genotype by Environment for Grain Yield of Salt tolerance Rice Genotypes in Coastal Saline Area
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Pusat Penelitian dan Pengembangan Tanaman Pangan
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Multi-environment experiment could reveal the performance and adaptation of the advanced breeding lines for specific or general environment. The objective of the present investigation was to analyze the pattern of Genotype x Environment (G x E) interaction for grain yield of 67 genotypes by Additive Main effects and Multiplicative Interaction (AMMI) model using the data generated from observational yield trial in three different coastal rice environment in Indonesia including one site in coastal of Eretan, Indramayu (West Java) and two sites in the coastal area of Mataram, West Nusatenggara during dry season of 2009. In each location, the experiment was arranged in a randomized complete block design with three replications, 5m2 plot size and 20 cm x 20 cm of planting space. Standard management practices for irrigation field were followed for all trials. The results showed the highly significant genotypic and G x E interaction. The genotype x environment (GxE) interaction influenced the relative ranking of the genotypes across environment. Genotype 62(IR76397-2B-6-1-1-1-1), G3(IR58427-5B-15), G61(IR76393-2B-7-1-1-3-1), G19 (IR73055-8-1-1-3-1), G26 (IR 77674-3B-8-2-2-14-1-AJY5), G38(IR77674-3B-8-2-2-14-2-AJY4), G35(IR77674-3B-8-1-3-13-2-AJY2), G44(IR68144-2B-2-2-3-3), and G53(IR72593-B-18-2-2-2) produced higher yield compared to the overall mean, and showed low G x E interaction effect with low ASV (AMMI’s Stability Value) score presented the high yield genotype with high adaptability compared to the checks. G23(IR77674-B-20-1-2-1-3-6-4-AJY1,8.39 t/ha), G25 (IR 77674-3B-8-2-2-12-5-AJY2, 8.11 t/ha), G24(IR77674-3B-8-2-2-8-3-AJY4, 8.32 t/ha), G18(IR72049-B-R-22-3-1-1, 8.78 t/ha), produced high yield and indicated suitable for Eretan environment. Both the stable genotypes and the specific adaptation genotypes with the highest average yield compared to the checks will be further evaluated in prelimenary yieid trials in the several environments with the bigger size plot.
Keywords
salinity; rice; grain yield; Genotype x Environment