小麦亲本组合高产潜力的灰色综合评价

Grey Synthetic Appreciation of the Yield Potential of Wheat Parent Crosses

利用不同生态区70年代以来育成的丰产潜力在400kg/亩以上的不同类型的小麦新品种(系)及其亲本材料为试材,采用多元统计分析与灰色理论相结合的方法,从整体、综合的角度探索了一种更接近于育种实践需要的亲本组合综合评价的新方法——灰色Fuzzy综合评估+综合选择指标。现有高产品种(系)的亲本组合经灰色Fuzzy综合评估,绝大多数为“中等”及“优级”,且级别越高,其后代品种(系)产量潜力愈大。亲本组合的综合选择指标值与其后代品种(系)产量水平,在三类型(大穗型、中间型、多穗型)品种(系)中均存在显著相关,相关系数分别为0.6727~*、0.5389~*和0.7329^(**)。

By studing the relationship between crossing parents and their offspring cultivars (lines) with the yield potential having 400 kg/mu or more, we proposed a new method for appreciating the yield potential of crossing parents-Grey Fuzzy Synthetic Appre-ciation (GFSA) and Synthetic Selection Index (SSI) Most of the crossing parents were appreciated as B grade (Qualified) or A grade (Good) by GFSA. And the cultivars (lines) from A grade crosses have higher yield than that from B. There is a significant positive correlation between the value of SSI of crossing parents and the yield of their offspring cultivars(lines), the coefficients of correlation in 3 different types-Large Spike type, Medium type and More Spike type-being r1=0.6727, r2=0.5389 and r3=0.7329, respectively.