小麦不同生态类型品种穗分化杂种优势研究

Studies on the heterosis of spike differentiation in different wheat ecotype varieties

对6个不同生态类型小麦品种及其完全双列杂交F1幼穗分化特点和穗分化杂种优势的研究表明,杂种幼穗分化各主要时期普遍存在杂种优势;不同生态类型组配方式的杂种穗分化优势不同;穗分化杂种优势与产量杂种优势具有一定相关关系;黄淮麦区杂交小麦最佳生态组配方式为春性品种×冬性品种。

In the study,six different ecotype varieties of common wheat and F 1 derived from 6×6 complete diallel crossing system were selected for the research on the characteristics and heterosis of spike differentiation.The results showed that heterosis existed in most key spike differentiation phases and varied with different ecotype varieties.Heterosis of spike differentiation was positively correlated with heterosis of hybrid yield.Finally,the author concluded that it was the best way to produce strong heterosis combination by selecting the mode of “Spring wheat ×Winter wheat” in Huanghuai Winter Wheat Region.