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dc.contributor.authorAnupong Wongtameeen_US
dc.contributor.authorChanya Maneechoteen_US
dc.contributor.authorTonapha Pusadeeen_US
dc.contributor.authorBenjavan Rerkasemen_US
dc.contributor.authorSansanee Jamjoden_US
dc.description.abstract© 2015, Springer Science+Business Media Dordrecht. Weedy rice (Oryza sativa f. spontanea Baker) is one of the most serious weeds in direct-seeded rice production; adversely affecting rice areas and yield in Thailand. The objectives of this study were to evaluate the level of morphological and agronomical variation and the level and pattern of genetic diversity and population structure of weedy rice populations in Thailand. Sixty-three weedy rice populations collected from three rice production areas of Thailand were sampled over four rice cultivation seasons to study phenotypic characteristics, genetic diversity and population structure. All analysis included comparison with seven cultivated rice varieties and seven local common wild rice populations. The results demonstrated considerable genetic and morphological variation, population structure, and changing dynamics of Thai weedy rice populations, both within and between regions and growing seasons. Phenotypic and genotypic variations and population structure of weedy rice populations changed temporally, with a trend over five years toward greater similarity to companion crop rice varieties. The ongoing gene flow, combined with ecological conditions created by farmers’ selection and agronomic practices, may enhance fitness and adaptability of weedy rice populations and stimulate the evolution of invasiveness in weedy rice plants. The adaptive evolution of weedy rice tended to parallel cultivated rice for high adaptation to the agronomic practices, possibly including selection for crop mimicry, which has led to the convergence of weedy populations phenotypically and genetically with the companion crop rice.en_US
dc.subjectAgricultural and Biological Sciencesen_US
dc.subjectBiochemistry, Genetics and Molecular Biologyen_US
dc.titleThe dynamics of spatial and temporal population genetic structure of weedy rice (Oryza sativa f. spontanea Baker)en_US
article.title.sourcetitleGenetic Resources and Crop Evolutionen_US
article.volume64en_US Mai Universityen_US Protection Research and Development Officeen_US
Appears in Collections:CMUL: Journal Articles

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