小麦春化进程与植株年龄相关问题的商榷  

Relation between Vernalization Response and Final Leaf Number in Wheat

作　　者：王士英[1] 

机构地区：[1]中国农业科学院作物育种栽培研究所,北京100081

出　　处：《作物学报》1997年第6期746-752,共7页Acta Agronomica Sinica

摘　　要：主茎总叶数的变化是量测小麦春化反应性的一个可靠指标。随春化处理日数的增加,主茎总叶数减少。但小麦存在一个不能被春化反应所影响的基本叶片数,即6片。春化反应性随植株年龄的增加而减弱,直至失去。品种的春化反应性是由其主茎最大可变叶片数(。)和每一低温日数对出叶数的降低值(p)所决定。小麦的春化现象,实际上是某些小麦类型因低温而使得其生育早期的出叶数减少,进而导致主茎总叶数降低的一种生态适应方式。Finalleaf number on main stem could be a reliable measure for wheat vernalization response. Finalleaf number decreases with increase of vernalization duration until reaching a plateau. Six is the base leaf number which implies that final leaf number can not be further decreased through vernalization treatment. Accumulated plant age, expressed as leaf stage,enables attainment of vernalization insensitivity, independent of, or in combination with vernalization treatment. The vernalization responsiveness of a cultivar can be characterized through two parameters, i, e. , a, the maximum 'changeable number of leaves' by vernalization treatment, andβ, the 'decrease rate of leaf number' by each day of vernalization treatment. The fundamental concept for wheat vernalization response is that lower temperatures in the early development stage can minimize the number of leaves emerged during that phase and result in a lower final leaf number.

关 键 词：小麦 春化反应 主茎叶数 植株年龄 

分 类 号：S512.101[农业科学—作物学]