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- W2176083666 abstract "Weedy rice (Oryza sativa f. spontanea) has become a noxious weed in direct seeded rice and is widespread throughout the central plain of Thailand. It spread from infested areas to clean areas primarily as contaminants in rice seed lots. To determine contamination of weedy rice in seed, ninety three samples of five rice varieties were collected from farmers and local commercial seed producers. Three morphological characters, i.e. straw with brown strip hull, red pericarp and seed awning, were used to determine the extent of weedy rice contamination. It was indicated that only 18 samples (19.4%) of total 93 seed lots were detected as contaminated seed lots when characterized by seed morphology. Next, 35 samples with seed morphology of crop rice variety were selected and sown in pot experiment, ten plants per sample. DNA analysis was performed using four microsatellite markers. It was found that 14.3% of the samples were contaminated with wild rice alleles. Therefore, seed morphology alone could not efficiently detect weedy rice contamination in rice seed because of its mimicry of crop rice." @default.
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- W2176083666 date "2012-01-01" @default.
- W2176083666 modified "2023-09-26" @default.
- W2176083666 title "Determination of weedy rice (Oryza sativa F. spontanea) contamination in rice seed lots." @default.
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