Phenotypic diversity of selected Philippine traditional upland rice (Oryza sativa L.) varieties
1997
Jalotjot, H. Jr. | Borromeo, T.H. (Philippines Univ. Los Banos, College, Laguna (Philippines). Inst. of Plant Breeding)
Thirty two selected Philippine traditional upland varieties obtained from the Genetic Resources Centre, IRRI, were grown during the 1995 wet season at the UPLB Central Experiment Station. The varieties were characterized based on morpho-agronomic characteristics. Variation among the varieties were observed in leaf length, number of days to 50 percent heading, number of days to 80 percent maturity and panicle length. The Shannon-Weaver Diversity Index (H) revealed significant variations among different morphological characters namely: leaf angle, flagleaf angle, blade pubescens, collar color, culm angle, culm strength, apiculus color, panicle exsertion, awning, lemma-palea pubescens. Diversity was highest in the Visayan region based on the H values of the said characters. Cluster analysis using the Statistical Analysis System grouped the 32 varieties into four arbitrary clusters based on the 0.5 average distance level between clusters. Cluster means of 14 characters showed that leaf length, number of days to 50 percent heading, number of days to 80 percent maturity and plant height contributed largely to genetic divergence
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