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題 名 | 栽培稻(Oryza sativa)與野生稻(O. nivara)種間雜種及回交後裔族群生育期、株高及穗長性狀之遺傳及育種行為=Genetics and Breeding Behaviors of Days to Heading, Plant Height and Panicle Length in the Progenies Derived from the Crosses between Oryza sativa L. and O. nivara Sharma et Shastry |
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作 者 | 李長沛; 郭益全; 吳詩都; 曾富生; | 書刊名 | 中華農業研究 |
卷 期 | 50:2 2001.06[民90.06] |
頁 次 | 頁13-23 |
分類號 | 434.111 |
關鍵詞 | 栽培稻; 野生稻; 種間雜交; 回交; 農藝性狀; Oryza sativa; O. nivara; Interspecific hybridization; Recurrent backcross; Agronomic characters; |
語 文 | 中文(Chinese) |
中文摘要 | 以臺農67號(TNG 67)及臺稉1號(TK 1)兩個稉稻品種為輪迴親本與由國際稻米研究所引進之野生稻O. nivara (Acc. 104705)雜交及回交,探討其雜種後代F₁、F₂、BC₁F₁、BC₁F₂、BC₂F₁、BC₂F₂、BC₃F₁、BC₃F₂族群生育期、株高及穗長等性狀的變異。在生育期TNG 67 × O. nivara、TK 1 × O. nivara之F₁偏向野生稻親本之早熟表現,顯示O. nivara具早熟顯性基因,但TK 1 × O. nivara組合於F₂出現兩明顯之高峰,也說明O. nivara之早熟顯性基因不同於早熟栽培品種臺稉1號。在株高及穗長方面,O. nivara屬半矮性株高約100公分,F₁在TNG 67 × O. nivara之組合株高偏向TNG 67之完全顯性,穗長則偏向於野生稻之部份顯性;TK 1 × O. nivara組合在株高及穗長則均呈明顯的雜種優勢。兩組合F₂族群之株高及穗長之變異性均高,呈明顯超親分離。自BC₁F₁開始選拔株型接近栽培稻者進行回交,該單株並行宿根採收種子以繁殖F₂族群。由各回交F₁及F₂的表現得知,BC₁F₁、BC₁F₂變異性仍高,但至BC₂F₁、BC₂F₂已明顯縮小,至BC₃F₁、BC₃F₂變異程度最低,且族群的分布最為集中。但在株高及穗長於BC₂F₂仍有植株較矮、穗較短的弱勢植株產生。兩雜交組合之生育期、株高及穗長的相關性,在F₂此三性狀間均呈顯著正相關。但在回交世代除TK 1 × O. nivara於BC₁F₂生育期與株高為正相關外,TNG 67 × O. nivara各回交世代及TK 1 × O. nivara之BC₁F₂、BC₂F₂均為負相關。兩雜交組合株高與穗長間在各回交F₂世代則均呈正相關。 |
英文摘要 | Two sinica varieties, Tainung 67 (TNG 67) and Taiken 1 (TK 1), and a wild rice, O. nivara (Acc. 104705) were used as the recurrent parents and non-recurrent parent respectively to investigate the genetic and breeding behaviors including the days to heading, plant height and panicle length of the interspecific hybrid progenies. The F₁, F₂, BC₁F₁, BC₁F₂, BC₂F₁, BC₂F₂, BC₃F₁, BC₃F₂ populations derived from the interspecific crosses along with their parents were planted simulatneously at the experimental farm of Taiwan Agricultural Research Institute in the first crop of 1996. The F₁ plants of two cross combinations exhibited the tendence of early-heading like their wild parent, O. nivara does. This showed O. nivara has some dominant early genes. The days to heading of F₂ population of TK 1×O. nivara had two peaks. This suggested the early gene of O. nivara differs from the gene of TK1, which was also classified as an early mature cultivar. O. nivara belonged to a semidwarf of about 100 cm. The plant height of F₁ derived from TNG 67×O. nivara combination was tended to exhibit complete dominance like TNG 67 and panicle length was tended to exhibit as partial dominance like O. nivara. Heterosis was found on both characters in the TK 1×O. nivara combination. A large variance and transgressive segregation were observed in F₂ populations for both cross combinations. Although many weak plants with shorter plant height and panicle were found in the BC₂F₂ populations for both cross combinations, less variances were also observed in backcross populations When cross generation increased. Positive phenotypic correlactions were found among the days to heading, plant height and panicle length in F₂ populations in both cross combinations. Positive correlations were found between plant height and panicle length in each backcorss F₂ populations of both corss combinations. However, negative correlations were observed between the days to heading and plant height in all the backcross F₂ population of back cross in both cross combinations, except the BC₃F₂ of TK1×O. nivara. |
本系統中英文摘要資訊取自各篇刊載內容。