1. Many progenies were obtained by a Brassica oleracea-Sinapis alba monosomic alien addition line plant selfing. 将甘蓝-白芥单体异附加系自交，获得了其自交后代。
2. Selfing progeny of E. urophylla showed depression in general, but some other combinations showed self-advantage. 尾叶桉自交后代普遍存在衰退现象，但亦有个别组合表现出一定的自交优势。
3. Key findings are as follows: 1. Selfing had significant impacts on the main economic characters of Brassica napus l. 主要研究结果如下：1。自交对甘蓝型油菜主要经济性状有显著影响。
4. A combination of dichogamy and herkogamy in hermaphroditic plants is an effective mechanism to encourage outcrossing and avoid selfing. 雌雄异熟和异型花在一些被子植物中的共同存在被认为是一种有效避免两性花植物自交并促进异交的机制。
5. Selfing heterozygotes halves the heterozygosity, and thus outbreeding maintains heterozygosity and produces a more adaptable population. 自交杂合子有一半杂合性，因此远系繁殖可以产生适应能量更强的种群。
