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題 名 | 栽培稻 (Oryza sativa) 與野生稻 (O. australiensis) 導入系統之建立及其產量相關性狀之表現=Construction of Introgression Lines from Wild Rice (Oryza australiensis Domin) and Assessment of Yield-Related Traits |
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作 者 | 李長沛; 古新梅; 胡澤寬; 陳治官; 賴明信; 曾清山; 陳哲仁; 曾東海; | 書刊名 | 臺灣農業研究 |
卷 期 | 58:3 2009.09[民98.09] |
頁 次 | 頁219-233 |
分類號 | 434.111 |
關鍵詞 | 栽培稻; 野生稻; 種間雜交; 回交; 胚拯救培養; 導入系統; 產量性狀; Oryza sativa; Oryza australiensis; Interspecific hybridization; Backcross; Embryo rescue culture; Introgression lines; Yield related traits; |
語 文 | 中文(Chinese) |
中文摘要 | 利用野生稻建立的導入系統 (introgression lines; ILs) 為育種增進及遺傳分析的良好材料,本試驗擬在稉稻背景下,測試栽培稻與澳洲野生稻 (Oryza australiensis) 導入系統的可行性。以5個稉型栽培品種 (O. sativa) 與從IRRI引進之3個O. australiensis系統 (IRGC100882、101379、101410) 進行雜交並行胚拯救培養,依雜交組合的不同,雜交可稔性 (seed set) 介於2.3–54.6%之間,胚拯救培養成活率則為0至83.3%。調查台農67號 (TNG67) 與3個野生稻系統的雜種F1,除TNG67 × IRGC101410 表現出雜種弱勢,其餘兩雜交組合F1可正常生長,但均不具稔性。經回交後僅TNG67 × IRGC 100882可獲得回交種子,所得BC1F1植株均不稔,但於BC2F1則可獲得部分可稔植株,第1次和第2次回交的成功率均低 (< 0.98%),經第3次回交的成功率平均達46%。評估多次回交之F1及F2世代的表現,發現於BC2F2和BC3F1可得正常稔實植株,而且各性狀的變異大,可作為選拔之適期。成立的系統經外表型選拔固定至BC3F7,獲得111個系統,有8個 (7%) 系統產量較輪迴親本TNG67增產10%以上,最高達23%。在其他產量相關性狀上,各性狀表現最佳的系統與輪迴親相比,增加幅度從千粒重的15.7%至每穗粒數的78%。這些經由多次回交建立的種間雜交導入系統,可做為中間親本並將進一步分析其遺傳組成。 |
英文摘要 | To develop introgression lines (ILs) from wild rice, five Japonica varieties cultivated rice (Oryza sativa) were crossed with three accessions of wild rice O. australiensis, obtained from International Rice Research Institute (IRRI). The percentage of seed set and germination in embryo rescue culture varied with crosses, ranging from 2.3 to 54.6% for seed sets and 0 to 83.3% for seed germination. Among the three crosses, Tainung 67 (TNG67)×IRGC100882, TNG67×IRGC101397, and TNG67×IRGC101410, F1 weakness was observed in TNG67×IRGC101410, whereas all of the three crosses failed to produce F2 seeds. Backcross was successful only for the hybrid TNG67×IRGC100882, using TNG67 as the recipient, and the production of seeds from this hybrid was low (<0.98%) in the first and second generations of backcross but raised to 46% in the third generation of backcross. To evaluate yield-related traits in multiple generations backcross populations, wide ranges of variations in BC2F2 and BC3F1 were observed, suggesting that they are the best generations for selection in the breeding procedure. To assess yield-related traits, 111 lines BC3F7 were selected from BC3F1. Eight lines were showed more than 10% higher grain yield than TNG67. The others trait-enhancing lines best over TNG67 were from 15.7% in 1000-grains weight to 78% in panicle length. These ILs will be useful as a source of valuable traits for the rice improvement and for detecting favorable genes of wild rice O. australiensis. |
本系統中英文摘要資訊取自各篇刊載內容。