Drought resistance of various rice genetic background based on raised bed screening system

Abstract

Drought is one of the major constraints of rice production in Indonesia. Climate change increases the risk of drought incidences. The evaluation of drought resisting rice genotypes available in Indonesia would hopefully find and enhance such resistance which could be utilized to be further tested in releasing a variety or donor parent within the drought-resistant breeding program. Raised bed system (RBS) is a relatively reliable method to screen drought resistance up to generative growth phase. This research aimed to screen 69 rice genotypes including 26 IRRI accession included in 3000 rice genome sequencing projects, 29 elite lines, 6 old released variety, 6 released variety, and each of susceptible and resistant drought check variety raised bed screening system. The trial was conducted in RBS facility in ICRR from January to May 2017 following a randomized complete block design of two replications. The materials were directly planted in a 10 hill row with planting space of 20 cm x 20 cm. The result showed that HHZ5-SKI-9-3-0Kr-JK-IND and IR64 Dro1 had good leaf drying and rolling and a number of field grain/panicle. IR84636-13-12-2-6-3-3-2-2-B, Inpari 18, and Huanghuazhan had the highest total grains/plant. Some drought-resistant mechanism might be found within the tested genotypes.