頁籤選單縮合
題 名 | 水稻秧苗生育特性之遺傳育種研究(1):秧苗初期生長與種子所貯藏養分之關係 |
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作 者 | 吳詩都; | 書刊名 | 中華農學會報 |
卷 期 | 89 1975.03[民64.03] |
頁 次 | 頁48-57 |
關鍵詞 | 水稻秧苗; 生長; 育種; 秧苗; 貯藏; 種子; 養分; 遺傳; |
語 文 | 中文(Chinese) |
中文摘要 | 使用千粒重差異大的水稻品種6個,臺中65號及早熟Isogenic品系A37,高生種3個及其相對之半矮生Isogenic品系3個,共14個,在暗室中分30℃、18℃ 2種溫度處理,使其發芽以分析品種特性及胚乳營養期苗之特性關係。其結果如下: (一)苗重之生長經過呈S字型,經對數變換則具有呈直線之性質。 (二)構成糙米之物質約有89%轉化並供給苗之生長,而苗種之最大值約佔糙米重之60%。 (三)苗之生長效率,發現在高溫下3~6日為最大為56%~67%,小粒種>中粒種>大粒種,晚熟種>早熟Isogenic品系。半矮生Isogenic品系大於相對高生種。在低溫以8~12日為最大為55%~69%,而與種子大小不呈關係,但早熟Isogenic品系等於晚熟種,高生種大於其相對之Isogenic品系。 (四)苗重在兩種溫度處理下,發現種子愈大苗愈重之傾向。早熟Isogenic品系>晚熟種,而高矮生則無一定之傾向,但品種與溫度之間有交感作用之存在。 (五)苗之生長速度在兩種溫度處理下,除大粒種Peta外一般以種子愈小苗之生長速度愈大之趨勢,早熟Isogenic品系>晚熟種,而高矮生則無一定之傾向且品種與溫度有交感作用之存在。 (六)芽重與根重間之相對生長係為芽對根之生長呈負之生長關係。其程度在高溫為大粒種>中粒種>小粒種,早熟種>晚熟種,半矮生種大於其相對高生種。在低溫則呈相反現象。 (七)並加以探討適應直播及稚苗移殖以機械操作品種之特性。 |
英文摘要 | A total of 14 rice varieties were used as the material in this experiment. They are: six very wide scope on the seed weight (12.6-30.0 g/1000 seeds), Taichung No.65 and its early isogenic line and three tall varieties and its semidwarf isogenic lines. The relationship between the characteristics of varieties and seedling growth was investigated. The seeds were germinated in the dark at 30 and 18℃. A hundred seedlings at a time (two replications of 50 seedlings each) were sampled every third day in the 30℃ every fourth day in 18℃. The dry weight of the seeds, shoots and roots at each sampling time was recorded together with the weight of the seeds before germination. From these data the growth rate/ expressed as seedling weight at six days (30℃) and at twelve days (18℃) after sowing/ hulled seed weight before germination/ and the growth efficiency (increase of seedling weight/ decrease of seed weight) were calculated, and allometric relation between the growth of shoots and roots was analyzed. The rsults obtained as follows: (1) The growth efficiency of germinating seedling of the rice varieties were 56~67% and 55~69% in 30 and 18℃, respectively. In 30℃, the growth efficiency was small in the large seed varieties, great in the middle seed varieties and greatest in the small seed varieties. Although, the growth efficiency of tall varieties was greater than semidwarf isogenic lines in 18℃, but the seed size and maturation were not correlated the growth efficiency. (2) The plant height of varieties was not correlated to growth rate and seedling weight, it was noted that there were interaction between variety and temperature in these two seedling growth characters. (3) The seedling weight increased gradually from small to large depended on the seed size and maturation. (4) Comparing the three seed size of varieties in growth rate, the rate was largest in small seed size varieties, smallest in large seed size varieties and the middle seed size varieties between the largest and smallest one. It was also found that the growth rate of early isogenic line larger than late variety. (5) The growth of the roots showed a negative-allometric relation to that of the shoots, and its varieties values were as follows: 1. large seed size varieties > middle seed varieties < small seed varieties 2. early variety> late isogenic lind and 3. semidwarf varieties > semitalldwarf isogenic lines in 30℃. However, the reults of 18℃ were contrary to the above. |
本系統中英文摘要資訊取自各篇刊載內容。