木兰科植物的杂交亲和性

采用常规杂交育种的方法，在木兰科属内和属间进行了62杂交试验，结果表明，除木兰属的木兰亚属和玉兰亚属之间没有杂交亲和性外，木兰科其他属内都有杂交亲和性，这表明属内不存在生殖隔离，除拟单性木兰属与木兰属的木兰亚属之间有杂交亲和性外，其它属间都没有杂交亲和性，这表明这些属间存在着生殖隔离，因此，木兰科植物的杂交亲和性基本上支持根据形态特征所建立的木兰科科下分类系统，同时，建议将拟单性木兰属与木兰属的木兰亚属合并为木兰属，并将玉兰亚属从木兰属中分出作为玉兰属。

The Cross-Compatibility of Magnoliaceae

Crossing experiment of 62 combinations within and between genus of Magnoliaceae were made in the Kunming Botanical Garden based on the conventional methods of crossbreeding. Results revealed that in the same genus, the cross-compatibility commonly exists in Magnoliaceae, except the intersubgeneric combinations (between subgenus Magnolia and Yulania ) in the genus Magnolia . The crossbreeding combinations between different genera showed that the cross-compatibility does not exist, except those between Magnolia and Parakmeria . These experiments proved the presence of reproductive isolation between genera but absence within genus. The results of cross-compatibility experiments also support the classification system of Magnoliaceae, which was established in terms of morphological characteristics. On the other hand, it is proposed that Parakmeria and subgenus Magnolia should be incorporated into the genus Magnolia , while the subgenus Yulania should be separated from the genus Magnolia and treated as an independent genus, Yulania .