Selection for drought-resistant rice (Oryza sativa L.) using polyethylene glycol

Abstract

The study was expected to provide information poly ethylene glycol (PEG) concentration that can be used for plant breeding base rice (Oryza sativa L.) plant. The research was conducted covering two experimentals stage, were (i). Tests of dry stress resistance of six cultivars of rice using PEG 6000, and (ii). Emerged test seeds of six rice cultivars that have been subjected to dry stress with PEG 6000. The treatments were designed based on a complete randomized design of two factors. The first factor used six cultivars of rice were cv.Mekongga, cv. Way Apo Buru, cv. Sidenuk, cv. Pepe, cv. Ciherang and cv. IR64. and the second factor was dry stress [(0, 5, 10 and 15) % of PEG] with replicates three times. The higher concentration of PEG lowered growth rate (GR), emergence rate (ER), germination energy (GE) and the relative germination rate on all cultivars of rice. Germinate the longer time, appropriate concentrations of PEG. Test of pre-emergence on soil giving the mixed response on all cultivars of rice and PEG level. Cv. Mekongga, cv. Sidenuk, cv. Pepe and cv. Ciherang have the ability to grow on soil test. Canopy and root length highest on cv. IR64. Cv. Sidenuk popularity score can be classified moderate tolerance, while cv. Pepe that was sensitive to drought stress.