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All Journal Biodiversitas Journal of Biological Diversity
SUPHASIT SITTHAPHANIT
Department of Agriculture and Resources, Faculty of Natural Resources and Agro-Industry, Kasetsart University. 50 Ngamwongwan Road, Ladyao, Chatuchak, Bangkok 10900, Thailand
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Effects of colchicine on polyploid induction, morphology, and yield components of several Thai rice varieties SUNTAREE SURSON; SUPHASIT SITTHAPHANIT; JAKKAPAT PRACHACHIT; THARADOL JITJAK; KHUMPANAT WONGKERSON
Biodiversitas Journal of Biological Diversity Vol. 25 No. 12 (2024)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d251204

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Abstract. Surson S, Sitthaphanti S, Prachachit J, Jitjak T, Wongkerson K. 2024. Effects of colchicine on polyploid induction, morphology, and yield components of several Thai rice varieties. Biodiversitas 25: 4677-4689. Rice (Oryza sativa) is a Thai staple food and is different from foreign rice in its characteristics. By producing polyploids, rice cultivation becomes resistant to unfavorable climatic conditions and produces good yields and good tastes. Inducing polyploidy can improve Thai rice. This research aimed to induce polyploid formation in Thai rice to be used as a breeding source for improving Thai polyploid rice in the future. This study created polyploids from 10 Thai rice varieties to test colchicine's impact on morphology and yield. Colchicine-treated rice plants were tested for polyploidy at 4 months of age using flow cytometry and awn seed characteristics. The results showed that colchicine treatment and varied exposure periods at 1 month of age significantly affected germination and abnormalities in rice varieties. Variations in rice varieties and exposure times resulted in varying morphological and yield component attributes at 3 months. All colchicine-treated rice types had 5-90% awn seeds. This study reveals that rice varieties and exposure durations affect the morphology and features of yield components. Awn seeds determined rice polyploidy, which varied by variety. Blackberry has the most awn-seed plants (90%), followed by Maejo 2 (60%), and Homnaka (60%).
Colchicine mutagenesis effects on the characteristics and correlation of the M2 variant population of rice varieties SUNTAREE SURSON; SUPHASIT SITTHAPHANIT; JAKKAPAT PRACHACHIT; THARADOL JITJAK; KHUMPANAT WONGKERSON; TANAKORN RACHAPILA
Biodiversitas Journal of Biological Diversity Vol. 26 No. 5 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260532

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Abstract. Surson S, Sitthaphanit S, Prachachit J, Jitjak T, Wongkerson K, Rachapila T. 2025. Colchicine mutagenesis effects on the characteristics and correlation of the M2 variant population of rice varieties. Biodiversitas 26: 2355-2367. Rice is a self-pollinating plant. In conventional rice breeding, variability is created in rice by crossbreeding. The method of crossbreeding rice is complicated because it requires much expertise to breed. The method of creating genetic variability in rice using chemicals, such as colchicine, is simple. This study used colchicine-induced variability in rice seeds, after which M1 generation variant plants with awn seeds were selected to create an M2 population for selection and to study the variation in the characteristics and correlation of rice. The results of the present study revealed that the M2 population of each M1 variant differed from the parental plants that did not receive colchicine in many morphologies and yield components. In addition, the M2 variant populations of each rice variety also differed. The study of the correlation values revealed interesting results for many traits, such as when rice seeds with awns appeared, the percentage of pollination was low. High tillering resulted in a high number of panicles, full grains, full grain weight, and number of leaves, but it also reduced the stomatal width, plant height, leaf width, leaf length, first shoot diameter, and SPAD value. This study selected mutant rice lines that had potent agronomic characteristics to improve Thai rice varieties.
Co-Authors JAKKAPAT PRACHACHIT JAKKAPAT PRACHACHIT KHUMPANAT WONGKERSON KHUMPANAT WONGKERSON SUNTAREE SURSON TANAKORN RACHAPILA THARADOL JITJAK THARADOL JITJAK