摘要
研究24个双季矮秆早籼品种(系)的结果表明:a.剑叶各性状间的相关比较密切,而倒二叶与倒三叶的角度和长宽比与其它各性状的相关都不密切。上三叶中,叶片长度与长宽比、叶面积、干重,面积与干重,干重与比叶重都呈极显著正相关。b.剑叶角度与倒二叶角度,剑叶宽与倒二叶和倒三叶宽,剑叶长宽比与倒二叶长宽比都呈极显著正相关;剑叶长与倒三叶长呈极显著负相关;剑叶其它性状与倒二叶,倒三叶的相关都不显著。c.上部三片叶对亩产量的贡献以剑叶最大,中、迟品种,剑叶的宽、面积、干重、比叶重与亩产量的相关系数都达显著水平;叶片各性状与日产量的相关均不密切,由此笔者提出了矮秆早籼叶片合理配置模式,认为在水稻栽培和育种中,采用“叶片合理配置,的概念将有助于株型的深入研究。
Relationships between leaf characters and grain yield of twentyfourdouble-cropping short-stalked indica early-season rice varieties (lines) werestudied in ranomized block design with three replications. The results obtainedare shown as follows. a. There were close correlatious among FGL characters,while no close correlation of FTL, SDL angle and leaf lengthwidth ratio withother characters were observed. For FGL, FTL and SDL, there were highly signi-ficant positive correlations of leaf length with leaf length-width ratio, leaf areaand leaf dry weight, between leaf area and dry weight, and also between leafdry weight and specific leaf weight. b. The correlative analysis for different leafpositions indicated that there were highly signicant positive correlations of FGLangle with FTL angle, FGL width with FTL and SDL width, and FGL length-widthratio with FTL length-width ratio. However, there was a highly signicantnegative correlation between FGL length and SDL length. Other characters werenot significantly correlated to FTL and SDL. c. For medium-late maturing ricegroup, leaf characters were closely correlated to per-day grain production,whereas the correlation coefficient of FGL width, area, dry weight and spe-cific leaf weight with per-hectare grain yield were all significicant. Thereforethe three upper leaves of rice plants made the greatest contribution to per-hectare grain yield. d. According to the experimental results the author here-from proposes an 'ideal leaf component model' for short-stalked indica early-season rice, and considers that adoption of the concept 'ideal leaf componentmodel' will be very valuable for a correct understanding of plant type in bothrice cultivation and breeding.
关键词
籼稻
叶
株型
产量
相关性
early rice
leaf
plant type
yield
correlations
