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本文通过对淮北地区不同年份种植的十二个品种的观测和统计分析,结果表明:三十年来,淮北地区小麦品种类型演变的趋势是植株高度逐渐矮化,冬性强度不断减弱,使幼穗分化的持续期加长。分化程度增强成为高产品种通过多花多实而提高个体生产力的主要生理基础。随着品种产量水平的提高,群体的光合面积呈线性增长,但净同化率并未提高。遗传型间的追溯连系通径分析表明,主要由於库源比值增大,提高了小麦灌浆期间的干物质同化积累率,从而提高了收获指数,成为产量潜力提高的重要因素,这是品种群体生产力提高的生理基础。本文还对进一步培育该区更高产新品种的途径进行了探讨。
Through the observation and statistical analysis of twelve cultivars planted in different years in Huaibei, the results showed that in the three decades, the trend of wheat varieties in Huaibei area was that the plant height gradually dwarfed and the winter intensity continued to weaken, The duration of differentiation is extended. The degree of differentiation has become the main physiological basis for high-yielding varieties to increase individual productivity through more flower and more solidity. With the improvement of yield, the photosynthetic area of the population increased linearly, but the net assimilation rate did not increase. Tracing back to the genetic type between the path analysis showed that, mainly due to the increase of the ratio of source and sink, increase the dry matter assimilation accumulation rate during grain filling, thereby increasing the harvest index, an important factor to increase yield potential, which is the variety groups The physiological basis for increased productivity. This article also discusses the ways to further cultivate more high-yielding new varieties in this area.