| 摘要: |
| 对５个部分显性矮秆小麦的杂种优势分析表明，半矮秆杂种小麦存在明显的产量优势，其中具有正向超亲效应的组合占７６％，超亲优势平均为１１．８％，以本地推广品种小偃６号为对照，超标组合为１００％，超标优势平均２４．８６％，以新育成品种陕２１３为对照，超标组合为４８％，平均超标优势８．７５％；对产量构成因素的分析表明，超亲优势大小次序为穗粒数＞千粒重＞穗数。穗粒数优势较强是半矮秆杂种小麦的一个特点。对８个农艺性状配合力的分析说明，０００４和５７４６配合力最好，其次为７５３９－２和矮特早。 |
| 关键词: 矮秆小麦,杂种优势,配合力,小麦育种 |
| DOI： |
| 分类号:S512.1 |
| 基金项目:国家“攻关”和国家“攀登计划”资助项目 |
|
| Analysis of Heterosis and Combining Abilities of Five Partial Dominant Dwarfing Wheat |
|
|
| Abstract: |
| Heterosis analysis of 25 crosses showed that 76%,100% and 48% of
crosses had stronger heterosis as compared with their higher parents,control Xiaoyan 6
and control Shaan 213 respectively.The yields of semi-dwarfing hybrid wheat was increased by 11.8%,24.86% and 8.76% in compairson with their higher parents,control
Xiaoyan 6 and control Shaan 213 respectively.The sequances of heterosis for three companent factors of grain yield waskernel numbers per spike over 1000-kernel weight over
spike numbers per area.The results indicated that the increase of kernel numbers per
spike was oneof the most important characteristics for gaining higher yield of semidwarfinghybrid wheat.For 8 characters concerned,the sequance of combining abilities of the dwarfing materials would be XN0004 and XN5746 over No.7539-2 and Aitezao。 |
| Key words: dwarfing wheat, heterosis, combining ability, wheat breeding |
