Variance analysis and heritability estimation of growth and yield parameter of sweet cassava promising clones in two environments

Abstract

Planting a good variety is important thing in increasing the productivity of cassava’s productivity. Selection and evaluation are needed for development of new variety. The evaluations were done in Malang (Entisol soil) and Probolinggo (Alfisol soil). The evaluation used an RCBD with three replications. Plants were planted on rows with distance 100 cm between rows and 80 cm within rows. Twelve clones (8 promising clones and four released variety) were used in this evaluation. Results can be seen that the variance of genotype was bigger than the variance of genotype x environment interaction for fresh tuber yield, starch content, long of tuber, diameter of tuber, tuber number/plant in eight months and plant height in 4 months, means genetic potency of clones tested more important compared to effect of genotype x environment interaction. This result indicated that clone tested have low chance to be a specific adaptation. The genotypic variance and the heritability for fresh tuber yield, diameter of tuber and tuber number/plant in eight months in Malang were higher than that in Probolinggo.