英、美、澳、中小麦品种温光效应与主茎叶数的关系

小麦主茎叶片数是小麦发育的重要指标 ,温光条件对主茎叶数有显著地影响。英、美、澳小麦品种具有比中国同类品种主茎叶片数较多和温光效应较大的特点 ,但温光对主茎叶数影响的作用类同。冬性品种以春化作用为主 ,而春性品种以日长作用为主导因素 ,英国冬麦有较明显的温光互作效应。通过温光条件可以有效地调节主茎叶数 ,从而实现营养生长向生殖生长过渡的调节

Relationship between Thermo-photoperiod Effect and Leaf Number on Main Stem in Wheat from U.K., U.S.A., Australia and China

The leaf number on main stem is important index in wheat development.The thermo-photoperiod condition significantly affects leaf number on main stem. Wheats of winter or spring from U.K., U.S.A. and Australia have the more leaf number on main stem than wheats of China.However, they have a same response to thermo-photoperiod condition. The key factor affcting leaf number on main stem is vernalization for winter varieties, photoperiod for spring varieties. The thermo-photoperiod interaction is significant for winter varieties of U.K.. The thermo-photoperiod condition can regulate leaf number on main stem in order to promote develpment from vegetative growth to reproductive growth.