糜子性状与产量的灰色关联度分析及品种选育侧重性状探讨

Grey Relational Analysis of Characters and Yield of Broom Millet and Discussion on Characteristics of Variety Selection

对45个糜子品种农艺性状与产量的关系进行了灰色关联度分析,探讨了各性状在产量形成过程中的重要程度,旨在为优良亲本的选配及糜子高产优质新品种选育提供理论依据。结果显示:与糜子产量相关且影响较大的性状顺次为穗重>茎基粗>穗粒重>株高>千粒重>穗长>有效分蘖>生育日数,穗重和穗粒重对产量贡献较大,反应植株生长健壮和抗倒伏程度的茎基粗也与产量关系较为密切,株高对产量也有一定影响。在糜子亲本选用和育种材料鉴选时,应重视大穗、穗粒重资源和育种材料,并考虑其茎基粗,适当关注株高,以便充分挖掘种质资源潜力,筛选、培育出优异糜子品种。

Relational grade analysis of grey system was used to study the productive power of 45 cultivars of broom millet in this paper, we discussed the importance of agronomic traits of broom millet in process of production, in order to provide theoretical basis for breeding new varieties and selection of good parents. The results showed that the correlation degree sequence between the characters and yield of broom millet was panicle weight 〉 stem diameter 〉 grain weight per spike 〉 plant height 〉 1000-grain weight 〉 ear length 〉 effective tiller 〉 number of days. This showed that the panicle weight and grain weight contributed greatly to yield. Stem diameter had closer relationship with yield. To a certain extent, stem diametert reflected robustness and lodging resistance of broom millet. Plant height also had some influence on yield. In the selection of breeding materials and parental identification, we should pay attention to those resources and breeding materials with the large spike and grain weight. At same time, we should consider stem diameter, plant height properly, so as to fully exploit the potential of germplasm resources and cultivate excellent cultivars.