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利用化学杀雄剂生产小麦杂交种,是杂种小麦尽快应用于生产的有效的途径之一。而这一技术的关键是强优势组合的选配。目前小麦杂优利用普遍存在着杂种产量不能显著超亲或超标;杂种株高偏高造成高产栽培易发生倒伏;一些强优组合往往父母本花期不能相遇的问题。另外缺乏一个综合农艺性状较好的亲本。本实验通过对小麦杂交组合杂种一代的产量、株高、穗粒数、千粒重等性状的杂交优势及杂交双亲的花期重叠情况进行测定,分析发现:杂交种的杂种优势主要表现在株高和千粒重上。因此,在强优势组合选配时,亲本应充分利用大粒或超大粒材料。从组合类型看:母本应选用矮杆、大穗大粒或超大粒型综合农艺性
The use of chemical killing agents for the production of wheat hybrids is one of the effective ways for the hybrid wheat to be applied to production as soon as possible. The key to this technology is the combination of strong advantages of matching. At present, the hybrid utilization of wheat is ubiquitous and the yield of hybrids can not be significantly exceed or exceed the standard. The higher plant height leads to high yield and easy to lodging. Some strong combination may not meet the parents’ current flowering stage. In addition, a lack of a comprehensive agronomic traits better parent. In this experiment, we tested the hybrid vigor and the overlap of florescence of hybrid parents by the crosses of yield, plant height, grain number per spike, thousand-grain weight and other traits in the crossbreeds of hybrids. The results showed that the heterosis of hybrids mainly manifested in plant height and 1000-grain weight on. Therefore, the parent should make full use of large or oversized materials when the combination of strong advantages is optional. From the type of portfolio to see: the mother should use short rods, large ears large grain or large grain agronomy