On-farm conservation and diversity assessment of traditional upland rice (Oryza sativa L.) varieties in Lanao del Sur and Maguindanao provinces, Philippines
2007
Mangindra, S.D.
The study aims to assess the on-farm conservation and genetic diversity of traditional upland rice varieties in Lanao del Sur and Maguindanao provinces, Philippines. The level of conservation in Maguindanao and Lanao del Sur was moderately high with a mean index of 3.85 and 3.17, respectively. Majority of the farmers were maintaining more than one traditional upland rice varieties without replacing the existing varieties. However, the potential for conservation in both provinces was low with a mean index of 2.0 (Maguindanao) and 1.44 (Lanao del Sur). Results showed that in Maguindanao, there was a significant correlation in terms of potential for conservation with the language spoken by the farmers, length of stay in the village, and number of years of rice cultivation. Moreover, the age and migration of the farmers, length of stay in the village, and number of years of rice cultivation. Moreover, the age and migration of the farmers were significantly correlated with the level of conservation in Lanao del Sur. Barter or the exchange of rice varieties had a strong relationship to the level of conservation in Maguindanao. In Lanao del Sur, however, selling of rice varieties had a strong relationship to the level of conservation. The Shannon-Weaver Index (H'), indicated that the 71 upland traditional varieties were highly diverse in both qualitative and quantitative traits. Cluster analysis based on quantitative and qualitative characters generated five clusters at 0.40 similarity index, while four clusters at Euclidian distance coefficient at 0.45, respectively. Furthermore, three and four clusters were generated based on Principal Coordinate Analysis and Principal Component Analysis.
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