红花檵木与檵木花数性表型变异研究

Study of the Number Variation of Outward Characteristic of the Loropetalum chinense and Loropetalum chinense var. rubrum

红花木与木花的数性结构有很大差异 ,木 4数性花占 96 2 %(花瓣、雄蕊、退化雄蕊、萼片均为 4数 ) ;野生红花木 4数性花约占 5 0 %;红花木栽培类型以 5数性花居多 ,不同类型品种花的数性结构亦有差异 ,总体变异规律为 :近期栽培品种双面红类 5数性花 >中期栽培品种透骨红类 >早期栽培品种嫩叶红类。利用花的数性表型变异探讨了品种的演化历史和新品种选育的前景。

There is a vast ditinction in the number structure between the Loropetalum chinense and the Loropetalum chinense var. rubrum. The 4 number character is about 96.2% in Loropetalum chinense (the flower petal, stamen, degenerated stamen and the sepal are also 4). The 4 number character is about 50% in wild Loropetalum chinense var. rubrum. The cultivated Loropetalun chinense var. rubrum's flower is always 5. There is a distinction in the number genetic structure of flower in diferent kind of variety. The law of totality variation is: present cultivated variety shuangmianhong type 5 number genetic flower>midterm cultivated variety touguhong type>early stage cultivated variety nenyehong type. The origin, the evolutionary history and the prospect of breeding of the Loropetalum chinense var. rubrum are discussed based on the number variation of the flower structure.