论文部分内容阅读
以两个籼粳稻杂交F2群体(F2-A:晚轮422/沈农265;F2-B:泸恢99/沈农265)为试材,在四川和辽宁同年种植,研究生态环境对株型特性、产量构成及其相互关系的影响。结果表明,生态环境对株型特性和产量构成因素具有较为明显的影响。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出降低趋势。在辽宁,有效穗数、千粒重、结实率以及产量均显著高于四川,每穗粒数则显著低于四川。千粒重、结实率和产量表现为Cw(长剑叶、弯穗)>Cz(长剑叶、直穗)>Dw(短剑叶、弯穗)>Dz(短剑叶、直穗),穗数和每穗粒数以Dz最低,Cz和Cw较高。剑叶长与产量构成因素间的相关性均未达到显著水平,而剑叶宽与每穗粒数均呈显著或极显著正相关,在辽宁,剑叶宽与结实率呈显著负相关。穗弯曲度只在四川分别与结实率及产量显著或极显著正相关,在辽宁则表现为与大多数产量构成因素相关不显著。
Two crosses between indica and japonica F2 populations (F2-A: Wanlun 422 / Shennong 265; F2-B: Luhui 99 / Shennong 265) were planted in the same year in Sichuan and Liaoning Provinces to study the effect of ecological environment on plant type Characteristics, yield components and their relationship. The results showed that the ecological environment had obvious effects on plant type characteristics and yield components. From Sichuan to Liaoning, plant height and spike curvature increased significantly, while spike length, flag leaf length, flag leaf width and flag leaf angle showed a decreasing trend. In Liaoning, the effective panicle number, 1000-grain weight, seed setting rate and yield were significantly higher than those in Sichuan, while the grain number per panicle was significantly lower than that in Sichuan. Thousand grain weight, seed setting rate and yield were Cw (long leaves, curved ears)> Cz (long leaves, straight ears)> Dw (short leaves, curved ears)> Dz And grains per spike Dz lowest, Cz and Cw higher. The correlation between flag leaf length and yield components did not reach significant level, but flag leaf width and grain number per spike had significant or extremely significant positive correlation. In Liaoning, flag leaf width and seed setting rate showed a significant negative correlation. Spike curvature was only significantly or very significantly positively correlated with seed setting rate and yield in Sichuan, but not significant with most yield components in Liaoning.