苏丹草农艺性状与产量、品质间的灰色关联度分析

摘要

In order to exploring the relationship among the agronomic characters and yield and quality of Sor-ghum sudanense populations,three sudangrass populations were studied with the method of grey correlation degree analysis.The results showed that leaf length and stem diameter had significantly positive effect on hay yield of sudangrass,which is the maj or limitation factor of hay and fresh grass yield;sudangrass cultivar/lines with less tiller and node,but appropriate leaf length,width and stem diameter possesses relatively high quali-ty;In sudangrass breeding process,according to specific breeding obj ectives for yield or quality,selecting these agronomic traits with stable performance and correlated relationship with high yield and quality,and under-standing the primary and secondary relationship,will help provide theoretical base for new cultivar breeding.%使用灰色关联度分析了3个苏丹草(Sorghum)材料6个农艺性状与产量和营养品质之间的关系,结果表明,1)叶长、茎粗对苏丹草干鲜草产量影响最大,且叶长与茎粗呈极显著正相关(P＜0．01),是影响干鲜草产量的主要限制因素；2)茎粗、叶长、叶宽适当,分蘖数和节数少的苏丹草植株、品系或品种的营养价值较高.在苏丹草育种的过程中,根据具体产量育种或品质育种的目标,选择与苏丹草高产高品质关系密切且表现稳定的农艺性状,明确各性状的主次关系,为苏丹草选育新品种提供理论依据.