【作者】 朴钟泽； 韩龙植； 高熙宗； 张建明； 陆家安； 李培德；

【Author】 PIAO Zhong-ze ZHANG Jian-ming LU Jia-an Institute of Crop Breeding and Cultivation,Shanghai Academy of Agricultural Sciences,Shanghai 201106,China HAN Long-zhi Institute of Crop Germplasm Resources,Chinese Academy of Agricultural Sciences,Beijing 100081,China Koh Hee-jeong LI Pei-de College of Agriculture & Life Sciences Seoul National University,seoul,441-744,Korea Anhui Agricultural University

【机构】 上海市农业科学院作物育种栽培研究所； 中国农业科学院作物品种资源研究所； 汉城大学校农业生命科学大学农学科； 安徽农业大学；

【摘要】 选用不同类型的9个水稻品种,利用不完全双列杂交方法,在施氮和未施氮水平下对干物重和氮素利用效率的配合力进行了分析。结果表明,最高分蘖期和孕穗期的干物重和氮素利用生理效率,在两种氮素水平下亲本的加性效应均对 F₁起主导作用,而收获期氮素利用生理效率在施氮条件下遗传变异主要来自基因的加性效应,而未施氮条件下主要来自于非加性效应;产量的遗传变异在施氮条件下来自基因加性和非加性效应,而未施氮条件下主要来自基因加性效应。特殊配合力（SCA）优良的组合,其亲本自身表现不一定优良,与一般配合力（GCA）也没有明显的相互关系,表明氮高效育种中利用亲本值和一般配合力很难正确预测杂种优势;另外,不同生育时期的氮素利用生理效率的遗传特性在不同氮素水平下变化较大。更多还原

【Abstract】 Combining ability of dry weight and physical N-use efficiency at different stage and grain yield was analyzed by using 9×9 diallel crosses with nine different type rice varieties under N-fertilized and N-unfertilized conditions.The results showed that:The additive effects was principal in dry weight and physiological N-use efficiency at maximum tillering stage,dry weight(DWB)and physiological N-use efficiency at booting stage under N-fertilize and N-unfertilized conditions,physiological N-use efficiency at harvesting stage under N-fertilized condition,grain yield under N-unfertilized condition while the non additive effect was dominant in PNUEH under N-unfertilized condition,grain yield under N-fertilized condition was controlled by additive and non additive effects. The crosses with larger SCA effects did not have perfect itself parents and were not correlated with cross of larger GCA certainly.The performance and GCA effect for its parents could not be used to forecast in hybrid rice.更多还原