Drought tolerant selection of rice genotypes using raised bed system

Abstract

Drough is one of major constrain in rice production in Indonesia. Developing of rice tolerant to drought would hopefully overcome the problem. Raised bed system is a modified selection method to screen drought tolerant in rice up to generative growth phase. This research aimed to evaluate 60 various genetic background of rice genotypes using raised bed method. The trial was managed according to randomized complete block design with two replications.The materials we directly planted with planting space of 20 cm x 20 cm in row plot consisted of 10 hills each. The trial was conducted in raised bed system screening facility in ICRR experimental station in Sukamandi during August - November 2016. There were five genotypes considered as tolerant based on leaf rolling and leaf drying score. There were 15 genotypes produced filled grains, ranged from 2 to 121 grains/plant or 0.12 to 4.48 grains/panicle. The seed set was ranged from 2 to 40%. Among the producing grain genotypes, BP16146M-1D-SKI-2-13-1-3, BP14352e-2-3-30p-JK-0, and BP17280M-46D-IND considered to have better drought tolerance based on number of filled grain produced and seed set rate. Yield trial of the lines would confirm the possibility for further testing for releasing variety.