Phenotypic variation of traditional rice (Oryza sativa L.) varieties in Bicol Region, Philippines
2018
Ferrer, M.C. | Duldulao, M.D. | Alfonso, D.O. | Castro, J.R. | Nombrere, J.M.Z. | Niones, J.M.
Traditional cultivars are important for sustainable crop production and provide source of important traits in breeding rice varieties that are high yielding, good grain quality and resistant to biotic and abiotic stresses. In Bicol region, there is a need to protect and characterize these landraces to avoid its possible extinction especially in areas with high risk of volcanic activity. This endeavor ensures the availability of traditional cultivars and its agronomic profile to be used in continuous breeding efforts in future generations. In this study, 86 traditional cultivars collected from Bicol were characterized using 58 morphological traits following the standard descriptors list for cultivated rice. The overall phenotypic diversity based on Shannon-Weaver diversity indices showed a medium level of phenotypic variation among the germplasm. The rice collections that exhibited longest panicle (32 cm) are PINO and DOS OHOY. While collections MARAGADAW, PALAGADAN, SABLAY, AZUCENA, MILAGROSANG PUTI, and KALANAY produced the heaviest grain (30g) among the cultivars studied. Several traditional rice germplasm collections have desirable attributes and should be further explored for direct utilization of these germplasm for varietal improvement programs.
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