摘要
两个籼粳稻杂交F2群体(F2-A:晚轮422/沈农265;F2-B:泸恢99/沈农265)分别在辽宁和四川种植,研究生态环境对亚种属性及其与株型性状相互关系的影响。结果表明,不同生态环境下F2代植株籼粳属性均呈接近正态的连续变异,相对于四川,辽宁呈现明显的偏籼分布,生态环境对程氏指数六性状的影响并不完全一致。生态环境对株型特性也有较明显的影响,从四川到辽宁,株高和穗弯曲度显著提高,而穗长、剑叶长、剑叶宽及剑叶张角则表现降低趋势。不同地区株高的类型间差异没有明显规律性,剑叶长表现为籼型显著大于其他类型的趋势,剑叶张角地区和类型间大多无显著差异,不同地区剑叶宽的类型间差异因组合而异。总之不同地区从籼型到粳型,均有穗长递减而穗弯曲度递增的趋势。籼粳稻杂交F2代植株个体籼粳属性与株型性状表现出一定的相关性,但相关的方向和程度在不同地区和组合间不完全一致。
Two F2 populations, one derived from the cross between Wanlun 422 （indica） and Shennong 265 （japonica） named as F2-A, the other derived from the cross between Luhui 99 （indica） and Shennong 265 （japonica） named as FE-B, were grown in Liaoning and Sichuan to analyze the effect of ecological environments on subspecies characteristics and their relationships with plant type traits. The result showed that subspecies characters in F2 generations were continuously varied in different environ- ments. Two populations were generally normal distribution in Sichuan, but obviously indica-like in Liaoning. The effects of en- vironment on six traits of Cheng＇s index were incompletely consistent. The ecological conditions had a significant effect on plant type traits. The plant height and panicle curvature increased significantly, but the panicle length, flag leaf length, flag leaf width, and leaf angle decreased in Sichuan. Plant height in different subspecies had no obvious regularity in different regions. Flag leaf length was longer in indica （H） than in other types, but flag leaf angle had no significant difference in different subspecies and environments. Flag leaf width was changed with the cross combinations. Generally, panicle length reduced, but panicle curvature increased progressively from indica （H） to japonica （K） type. The subspecies characteristics were certainly related with plant type traits, but the correlation between them was not consistent in different cross combinations and environments.
出处
《作物学报》
CAS
CSCD
北大核心
2013年第7期1240-1247,共8页
Acta Agronomica Sinica
基金
国家自然科学基金项目(30871468)
教育部高等学校博士学科点专项科研基金项目(20092103110002)资助
关键词
水稻
生态条件
籼粳杂交
亚种属性
株型性状
Rice
Ecological environment
lndica-japonica hybridization
Subspecies characteristics
Plant type traits
