基于SRAP标记分析的姜花属杂交育种的亲本选择

姜花属杂交育种的亲本选择中,除了考虑性状搭配之外,还应考虑该属的自交不亲和性带来的生殖障碍。本文通过分析姜花属20个种的22份材料和6个园艺品种的亲缘关系,探讨了亲缘关系与杂交结实率之间的关系,结果表明亲本材料的相似系数在0.4～0.6时结实率最高。结合实际育种工作,提出了姜花属亲本搭配的方法,首先从性状上进行搭配,包括苞片排列方式、香气和颜色等;另外考虑到其生殖特性,在选出的亲本过于远缘或过于近缘时,我们都必须考虑引入桥梁亲本,以集合更多的优良性状。

Parental Selection in the Cross Breeding of Hedychium Koenig Based on SRAP Markers

In the cross breeding of Hedychium,parental selection is related not only to the parental morphologic characters,but also to the reproducing barrier of self incompatibility. In this study,the phylogenetic relationships of 28 materials were analyzed. The results showed that parents with a similarity coefficient of 0.4-0.6 tended to have a high setting percentage after combined the relathionshipe with the setting percentages. The methods of parental selection in actual breeding work were suggested based on the present results. The characteristics,such as bract arrangements,fragrance and color,were the most important factors to be considered for cross breeding of Hedychium. When the parents selected were either too distant or too close,bridge parental taxon were necessary for gathering better characteristics.