小麦幼穗分化及抗寒性杂种优势研究

Studies on Young Spike Differentiation of Wheat and Heterosis of Winter Hardinesss

对６ 个不同生态类型小麦品种及其完全双列杂交Ｆ１ 的穗分化特点及抗寒性进行比较研究，结果表明，杂种在穗分化进程上存在明显“倾早现象”；但杂种的抗寒性强弱由其抗寒性强的亲本起主导作用。不同生态类型品种间杂交，有可能选育出幼穗分化早、越冬性好的强优势组合。

Six different ecotype varieties of common wheat and F 1 derivied from 6×6 complete diallel crossing system were selected for the research on the spike differentiation characteristics and winter hardiness,the results showed that there existed a remarkable inclination to spring parent in the spike differentiation progress of hybrids.But,for the winter hardiness of hybrids, the parent with strong winter hardiness played an important role.So some strongheterosis combination that has the characteristics of early spike differentiation and good winter hardiness could be selected through crossing between different ecotype varieties.