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选育抗干热风品种是保证干热风地区春小麦稳产、高产的重要措施。但在选育过程中,除采用直接鉴定即让所选育的材料直接经受干热风考验而决定取舍外,还可以观察其抗干热风的外部形态指标和特性。正确识别高抗干热风类型的有关性状指标,无疑地会加速抗干热风新品种的选育过程。 一、抗干热风品种的丰产性与稳产性 小麦灌浆的最适宜温度是20—22℃,如气温高于25℃,则植株蒸腾作用加速,导致水分供需失调,灌浆时间缩短,干物质累积过程提前完成。高温还加剧呼吸作用,养分
Breeding hot and dry wind varieties is to ensure dry and hot spring area of spring wheat stable yield, an important measure. However, in the breeding process, in addition to the direct identification of the material that is selected directly withstand the test of dry hot air and choose the right trade-off, but also to observe the external morphology of anti-dry hot wind indicators and characteristics. Correctly identify the type of traits related to high resistance to dry wind indicators, will undoubtedly speed up the breeding process of new varieties of anti-dry hot air. First, the anti-dry and hot wind varieties of high yield and stability The wheat filling the most appropriate temperature is 20-22 ℃, such as the temperature is higher than 25 ℃, the plant transpiration accelerated, leading to water supply and demand disorders, filling time shortened, dry matter accumulation process Completed ahead of schedule. High temperature also exacerbates respiratory effects, nutrients