Production of interspecific and intergeneric hybrids and analysis of genetic relationship in colchicaceous ornamentals

利用几种秋水仙科观赏植物进行种间和属间异花授粉。通过胚珠培养，成功地获得了Gloriosa spp.和橙叶山桑子。这些属间杂种与亲本相比具有新颖的形态特征，表明属间杂交在秋水仙科植物改良中的有效性。由于GISH序列可以清楚地区分属间杂种中的亲本染色体，因此Gloriosa、Littonia和Sandersonia之间的同源性可能相对较低。

Interspecific and intergeneric cross pollination was performed using several colchicaceous ornamental plants. Following ovule culture, intergeneric hybrids were successfully obtained among Gloriosa spp., Littonia modesta and Sandersonia aurantiaca. These intergeneric hybrids had novel morphological characteristics compared with their parents, indicating the validity of intergeneric hybridization in the improvement programs of colchicaceous ornamentals. Since parental chromosomes in the intergeneric hybrids could be clearly discriminated by GISH sequence homology among Gloriosa, Littonia, and Sandersonia may be relatively low.