马铃薯植株7个主要性状的配合力分析

Combining ability analysis for 7 plant's main characters in potato (Solanum tuberosum)

研究了mira等10个马铃薯品种的22个杂交组合无性一代的植株生长势等7个植株性状的群体遗传和配合力效应。结果表明,晚疫病的亲本加性效应达90.6%;开花性、茎色分离、株高分离、株形分离等4个植株性状的亲本非加性效应分别为72.3%,80.1%,81.5%,93.0%;植株生长势和花色分离的亲本加性和非加性效应均很重要,其加性效应分别为45.2%,47.9%,非加性效应分别为54.8%,52.1%。双亲(至少有1个)一般配合力高的杂交组合的群体表现,优于双亲具有一般配合力平均值的杂交组合;而双亲具有一般配合力平均值的杂交组合的群体表现,优于双亲一般配合力都很低的杂交组合。根据亲本配合力可以有效预测杂交组合后代群体的遗传表现。

A study was conducted on 22 crosses from 10 varieties including mira variety to evaluate 7 main characters of plant in the first clonal year potato crops.The results indicated additive gene action of parents for late blight was 90.6%.Non-additive gene actions of parents for flowering qualities,color separating of stems,separating of plant's heights and shapes was 72.3%,80.1%,81.5%,93.0%,respectively.Their non-additive gene actions were more important than additive gene actions in the progeny's inheritance.And both additive and non-additive gene actions were found to have the same importance with a preponderance of the later in the inheritance of plant vigor and color separating of flowers.Progeny means of crosses involving both or at least one parent with good general combining ability was,in general,higher than that of other cross combinations for various characters including plant' s vigor and late blight.Selection of parents based on their general combining ability and crossing them in all possible combinations to select the best single plant or true-seed potato crosses by progeny test would be a suitable breeding strategy for potato crops.