【摘要】 诱发突变是改良作物株形结构的有效方法。叶角（叶与茎秆之间夹角）是一个重要的株形性状。遗传分析结果表明:叶角突变性状属数量性状,但窄角性状表现部分显性。小麦旗叶及其下一叶的叶角狭义遗传力较高,分别为73%和61%,且不受栽培密度的影响,因此在育种的早期世代（M₂或 F₂）进行选择是有效的。更多还原

【Abstract】 Inducing mutation is an effective method for altering the leaf angle (the angle between the stem and the mid rib of the leaf).Leaf angle in wheat is a quantitative character."Narrow angle"appears to be partial dominant over"broad angle".The heritability of"narrow angle"of the flag leaf and that of its lower leaf amounted to 73% and 61% respectively. Hence leaf angle can be used as a characteristic for selection in early generation in plant breeding.更多还原