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利用12个杂交组合对T型春性杂种小麦的株粒数、株粒重、株穗数、主穗小穗数、千粒重和穗长等6个主要性状进行了超标优势分析,结果表明:所有组合的株粒重、株穗数、千粒重和穗长4个性状具有明显的正向超标优势;株粒数、主穗小穗数两个性状的超标优势表现为正负优势间幅度较大,分别为-19.2%～56.5%和-2.1%～5.3%.采用配合力的同亲回归分析,克旱9A和克82R27特殊配合力最高,其次为克丰二A×克82R67、克丰三A×克82R27.用两个春性T型杂种小麦和两个CHA杂种小麦、三个亲本(其中两个为对照品种)共七个品种,研究了群体密度对春性杂种小麦主要性状及其杂种优势的影响,明确了春性杂种小麦适宜的密度范围,为合理利用杂种小麦的优势效应,采取高产高效的栽培措施提供依据.
Six hybrid combinations were used to analyze six dominant traits such as grain number per plant, grain weight per plant, spike number per spike, spikelet per spike, grain weight per spike and spike length. The results showed that: The combination of grain weight, panicles per panicle, grain weight per panicle and panicle length had obvious positive over-standard superiority. The over-standard superiority of the two traits such as grain number and main spikelet showed a large positive- Respectively, from -19.2% to 56.5% and from -2.1% to 5.3%, respectively.Furthermore, using the same-parent regression analysis of combining ability, the combining ability of K9A and K22R27 was the highest, followed by KF2A × K82R67 and KF3A × g 82R27.Two varieties of spring T-hybrid wheat and two CHA hybrid wheat and three parents (two of which were control varieties) were used to study the effects of population density on the main characters and their hybrids The specific density range of spring hybrid wheat was clarified. In order to make rational use of the dominant effect of hybrid wheat and provide the basis for high yield and high efficiency cultivation measures,