頁籤選單縮合
題 名 | 甘蔗高產量品種育種=Breeding for High Yielding Varieties of Sugarcane |
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作 者 | 駱君驌; 曾寶敏; | 書刊名 | 中華農學會報 |
卷 期 | 27 民48.09 |
頁 次 | 頁19-25 |
關鍵詞 | 甘蔗; 高產量品種; 育種; |
語 文 | 中文(Chinese) |
英文摘要 | The high yielding varieties of sugarcane are particularly in need in Taiwan at present since the pressure of growing population has made the rice crop as a strong competitor in irrigated regions against the sugarcane crop in gross profit per hectare. The yield of surgarcane in tonnage is determined by the number of millable stalks per hectare and the length and diameter of the millable stalks. The nature, constitution, and formation of the millable stalks of a stool of different varieties of sugarcane had been studied by these authors and results obtained had been used in cane breeding program to select the high yielding varieties for commercial purposes. Experiments of autumn-planting revealed that the millable stalks produced at harvest were constituted mostly by primary and secondary orders of tiller and emerged mainly from November to January, or from the third to fifth month after planting. 60 to 85% of the weight of millable stalks were formed from March to September of the year, at the "shooting period" of vegetative growth of sugarcane plant in this Island. Efforts had been made to increase the number of millable stalks per hectare at harvest by means of rigorous selection of the parent plants as well as the offsprings produced from them. The number of millable stalks per hectare at harvest of some medium and thick cane varieties newly bred by this Statin had increased from 47,000 to 80,000 which is approximately the number of millable stalks of thin variety of N:Co. 310 harvested in commercial planting. It was found that a positive correlation does exist in tillering ability between the first sexually produced plants from true seeds and the plants vegetatively propagated from them in the subsequent gererations during selection. However, the survival of tillers to becoming millable stalks at harvest is a deciding factor to determine the yield of cane per hectare. Thus the selection for more millable stalks rather than for more tillers would be more a better reliablemethod for selecting the high yielding varieties of sugarcane. It is believed that a careful selection of parent plants with desirable tillering type may be a powerful tool in the breeding program to shift the direction from few to numerous millable stalks. |
本系統中英文摘要資訊取自各篇刊載內容。