|Title:||稻株型之生理及遺傳研究－Ⅰ.激勃素 (Gibberellic acid) 對單基因矮稻生長之影響||Other Titles:||Physio-Genetical Studies on Plant Type of Rice 1. Growth Response of single-gene Dwarf Mutants in Rice to Gibberellic Acid.||Authors:||張德梅
|Issue Date:||2-Jun-1970||Publisher:||農業試驗所||Journal Volume:||19||Journal Issue:||2||Start page/Pages:||14-25||Source:||農業研究||Abstract:||
利用日本型稻嘉南8 號、高雄27 號、臺中66 號、臺中155 號及嘉農242 號及由此等品種經放射線處理後所得單基因矮稻共21 品系為材料，以500ppm 濃度之GA 作種子之浸漬、植株噴撒及主幹之注射等三種處理。然後觀察其節間及株高之反應情形。
經種子處理後之秧苗生長受抑制者較多，但約30% 形之矮稻系統有促進影響。GA 對株高之促進影響有隨噴撒次數之增加而增加之勢。顯示GA 有累積促進效果。稻之全生育期中分蘗期，幼穗分化期，及抽穗期三期對GA 之反應較大。某些突變矮稻（如D-242-53 ）經GA 處理後株高及其他農藝性狀與其正常親本（嘉農 242 號）無異，其狀如同反祖型。
對 GA 影響最大的節間為第 4 節，其增加借數介於 22～26 之勸次為第 2 及第 3 節間，此三節間較容易受遺傳及環境因子之影響，進行矮稻之育種時此三節可作選拔之對象。
Effects of gibberellic acid ( GA ) on the plant height, with special emphasis on the pttern of internode elongation of single-gene semi-dwarf rice was studied. Four japonia type varieties together with 15 dwarf strains induced by irradiation were treated with 500 ppm of GA water solution.
The seeding height of the majority of strains tested was found to he repressed, while about 30% of the strains showed the promotive response to GA treatment. The degree of GA effect on internode elongation was increased as the number of treatment was increased, showing that there is an accumulative effects. It was found that the effect of GA was more prominent when it was treated at tillering, panicle formation and heading stages.
Some GA treated dwarf mutants showed the normal plant height and agronomic characters as those of original normal plant, in revertant type appearance.
Internode No.4 which is at the basal part of the plant was most sensitive to GA. The degree of increase in internode length is up to 2.2-26 times of untreated one. Internode No.2 and No.3 are the next sensitive to response to GA. It is therefore considered that these three internodes are more easily affected by both genetic and environmental factors. They could be subjected to selection during the course of breeding for dwarf- statured variety.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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