论文部分内容阅读
当前小麦选育的主要趋势是向矮化和多蘖方向发展(Tanaka等,1968)。茎秆较短品种的高产是由于抗倒伏和对N肥的反应较敏感之故。1972年苏联的Lukyanenko强调较短的茎秆是合宜的,并提出在总生物量不减少的情况下可以通过物质再分配使产量潜力进一步增加,亦即减少茎秆重量和降低高度可能使粒重相应地增加。北美(Briggle等,1968;Hofiz,1972)和中欧(Hron,1972)亦在其它方面进行矮秆小麦的选育工作。1969—1971年国际冬小麦观测圃的结果表明,要选育比Gaines更矮的高产品种是比较困难的。这三年中,每年至少有12个国家的30
The current trend of wheat breeding is toward dwarfing and tillering (Tanaka et al., 1968). The higher yield of shorter varieties of stem is due to the lodging resistance and the more sensitive response to N-fertilizer. Lukyanenko in the Soviet Union in 1972 emphasized that shorter stalks are desirable and suggested that the potential for further increase in yield could be further materialized through redistribution of the material without diminishing the total biomass, ie reducing the stalk weight and decreasing the height may make the grain weight Increase accordingly. North American (Briggle et al., 1968; Hofiz, 1972) and Central European (Hron, 1972) have also conducted dwarfing of wheat in other areas. The results of the 1969-1971 International Winter Wheat Observatory show that it is more difficult to breed high-yielding varieties shorter than Gaines. In these three years, there are at least 30 countries each year