基于灰色关联度分析的玉米新组合产量及相关性状评价

对2015年25个玉米新组合的13个性状进行灰色关联度分析,结果表明各性状与产量的关联度依次是穗粗、百粒重、行粒数、穗长、穗行数、倒伏倒折率、穗轴直径、出籽率、生育期、株高、穗位高、100 d籽粒含水量,综合评价最优的组合为XX_(23),与育种目标最接近,其次是XX_(24)和XX_(21),综合评价最差的组合为XX_(25),较差的还有XX_(22)、XX_(14)。多性状、多点、多年度考察对玉米新组合评价十分重要,综合灰色关联度加权法使新品种的选育和评价更加科学和客观。

Comprehensive Evaluation of Yield and Correlative Traits of New Corn Combination on the Basis of Grey Correlative Analysis

Gray correlative analysis was used to evaluate 25 new corn combinations comprehensively.The result showed the order of correla-tive traits of yield by the related degree from large to small was:ear diameter,hundred kernel weight,kernels per row,ear length,ear row num-ber,lodging and break rate,corncob diameter,seed producing rate,period,plant height,ear height,100 d moisture.Variety XX23 recorded high-est comprehensive evaluation value and was the nearest to breeding target, followed by variety XX24 and variety XX21 .Variety XX25 was the lowest among all varieties, variety XX22 and variety XX14 were less perfect either.It’ s important to study the varieties by multi-traits and in multi-loci as well as on multi-ages.The grey correlative analysis makes the breeding and evaluation of new varieties more scientific and objec-tive.