以有機栽培模式選育優質水稻新品系可行性之評估

本試驗利用130個嘉農育911303號之EMS突變系為材料，先於化學慣行法下篩選出各突變系味度值表現優良者，獲選各突變系再進行有機栽培，並依產量及抗稻熱病表現選出18個優良突變系進行產量試驗，結果發現突變系OR3味度值為57，稻穀產量較對照品種「台稉9號」('TK9')增產7%，是稻穀產量潛能佳且食味表現最優良的突變系；而OR14稻穀產量較對照品種'TK9'增產16%，味度值54與'TK9'相同，是產量潛能最佳且品質優良突變系，此二突變系值得開發以供有機栽培利用；而試驗結果顯示可於第一期作透過稻熱病自然發病環境，大幅剔除不抗病及產量潛能不佳突變系，於參試材料數目大幅降低後，再透過產量試驗選育出抗稻熱病、產量潛能佳且品質優越的水稻新品系，而本研究結果可供國內未來建構適合有機栽培之水稻品種選育時參考利用。

關鍵字

水稻；有機栽培；突變品系；稻熱病

並列摘要

A total of 130 mutants derived from CNY911303, induced by ethyl methanesulfonate (EMS), were screened for good palatability under the cultivation of traditional chemical practice. Those mutants possessing good palatability were then selected for high yield and blast resistance under organic farming. Eighteen mutants were chosen from the pool. After the evaluation of yield production, two mutants, OR3 and OR4, were selected because of their good palatability and high yield. When compared with 'Taikeng 9' ('TK9'), which palatability score was 54 and yield standard was 100%, the palatability scores of OR3 and OR14 were graded as 57 and 54 and yield increased by 7% and 16%, respectively. These two mutants are considered having the potential to be developed for organic farming. Results showed that stress susceptible and poor yield mutants were dramatically eliminated by placing the mutants in the environment of naturally occurred blast in the first cropping season. When trial mutants were reduced to an extent, yield experiment was applied to select new rice varieties that possess blast resistance, high yielding potential, and high grain quality at the same time. As a result, this study provides valuable information in rice breeding suitable for organic farming.

並列關鍵字

Rice ； Organic cultivation ； Mutant line ； Rice blast disease

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以有機栽培模式選育優質水稻新品系可行性之評估

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