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，成功地获得了凤仙花、丽塔尼亚和金山楂的属间杂种。这些属间杂交种与亲本相比具有新的形态特征，表明属间杂交在秋水仙观赏植物改良计划中的有效性。由于在属间杂交中亲本染色体的GISH序列同源性在格洛丽沙、利托尼亚和桑葚之间可以明显区分，因此可能相对较低。

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.