GGE and AMMI biplot for interpreting interaction of genotype X environments of cassava promising genotypes

Before releasing a new variety, the promising cassava genotype should be tested in some environments. This test is precondition for variety. The purpose of experiment to fulfill said precondition. experiments were done eight environments during 2010-2011 with an RCBD (Randomized Complete Block Design) and repeated three times. plants planted distance 100 cm between rows 80 within row. by testing genotypes released variety as checks. dimension plot was 5 m x 4.8 m. fertilized using 200-kilogram urea, kilograms Sp-36, KCl per hectare. Data starch production seven months taken calculated PBTools IRRISTAT software. result shows that PG-1 stable GGE AMMI biplot. Across environments, had high product months, reaching 6.05 tons value significantly higher (10%) than UJ3 (released variety). When price tapioca flour US$ 445/ton, increase compared almost same 269/ha. has been Minister Agriculture 2016 name UK 1 Agritan.