Morphological characterization of selected traditional rice variety under contrasting moisture regime
2015
Genilla, J.L.D. | Niones, J.M. | Suralta, R.R.
Rice (Oryza sativa L.) is cultivated in diverse environment. The traditional and indigenous rice varieties are widely adapted and popular in rice production in Mindanao [Philippines]. These rice germplasm are potential sources of gene(s) for tolerance to abiotic stress such as drought and soil moisture fluctuation stresses. In this study, the authors evaluated 10 selected popular traditional variety (TRV) that is widely adapted in upland and rainfed environment under well-watered (control) and transient waterlogged to drought (TWD) stress conditions. The experiment was laid in randomized complete block design with three replications in screenhouse. Among test genotypes, NSIC Rc160 (83.3 g/plant), Raeline 10 (78.3 g/plant), RV8 (78.3 g/plant), Hinumay (72.5 g/plant), Palawan (71.7 g/plant) and Speaker (68.3 g/plant) showed high biomass production under TWD condition. However, Speaker (2.50%), Palawan (0.06%) and RV8 (2.17%) showed increased in dry matter production relative to control condition. The increase in biomass production may be attributed to the ability maintenance in tiller production and height of the plant under TWD conditions. Rooting ability of these genotypes may contribute to the maintenance in soil water uptake thus enhanced or maintained shoot dry matter production. These Speaker, Palawan and RV8 traditional varieties may possess good rooting traits that may tolerate under drought condition. Further validation on the mechanism of these traditional varieties is needed against drought stress. Thus, these TRVs may be utilized for breeding program in drought stress.
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