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。
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 & characters concerned, the sequance of combining abilitiesof the dwarfing materials would be XN0004 and XN5746 over No. 7539-2 and Aitezao.
出处
《西北农业大学学报》
CSCD
1995年第4期6-10,共5页
Journal of Northwest Sci-Tech University of Agriculture and Forestry（Natural Science Edition)
基金
国家"攻关"资助项目
国家"攀登计划"资助项目
关键词
矮秆小麦
杂种优势
配合力
小麦
育种
dwarfing wheat, heterosis, combining ability, wheat breeding
