甜菜四倍体品系的综合表现与性状间关系的灰色关联度分析

应用灰色系统理论中关联度分析的方法，对12份四倍体品系进行了产量、品质和抗病性综合评价和性状间关系分析。结果表明：关联度分析的结果与四倍作品系的实际表现是一致的，关联度（γi）与粮产量、合糖率、产糖量是极显著的正相关，说明灰色关联度分析用于甜菜四倍体品系的综合评价是可行的。甜426优单选、甜427、甜408－2、甜433、范－4x单选等综合性优良，可以在杂种优势育种中进一步应用。性状间关联度分析与简单相关分析结果有较多一致之处，但对其应用和所得结果的分析应持慎重态度。

A Preliminary Study on the Grey Relational Grade Analysis of Synthetic Performance and Relationship between Characters of Tetraploid Lines in Sugarbeet

In this paper,grey relational grade analysis was applied to analyse the synthetic perfomance of root yield, quality and disease resistance of 12 sugarbeet tetraploid lines and the relationship between these characters.The results indicated that the result of grey reIational grade analysis was in accordace with practical performance of tetraploid lines.The correlation between grey relational grade and root yield, sucrose content, sucrose yield is positiye significantly and it is feasible to be used in synthetic evaluation of sugarbeet tetraploid lines. The grey relational grade of Tian426 single good selectant, Tian427, Tian408-2,Tian433 and Fanyu No1 4x single selectant are bigger than the others,indicated their synthetic characters aresuperior and could be fur ther used in sugarbeet heterosis breeding. The results have some identical between grey relational grade analysis and simple correlation analysis on relationshi between characters. But its utilization and evaluation the results should keep strict.