两种鹅掌楸繁殖成效的比较

Comparison of Reproduction Success of Liriodendron chinense Sarg. and L. tulipifera Linn.

摘要:

通过交配设计结合花部性状调查对鹅掌楸(Liriodendron chinense Sarg.)与北美鹅掌楸(L. tulipifera Linn.)的繁殖资源分配与繁殖成效进行了比较。结果表明，鹅掌楸通过增加繁殖器官的数目以提高繁殖成效，而北美鹅掌楸则通过提高繁殖器官功效来保障繁殖成效。根据不同交配组合的子代出苗率分析表明，鹅掌楸总体的雄性繁殖成效高于北美鹅掌楸，而雌性繁殖成效低于北美鹅掌楸。

Abstract:

The resources allocation and reproductive success were compared between Liriodendron chinense and L. tulipifera based on mating design trial and floral characteristics. Six adult trees, 3 from L. chinense and 3 from L. tulipifera, were chosen as mating parents. By comparing the floral characteristics between Liriodendron chinense and L. tulipifera, we found that there was a significant interspecies difference existing in both reproductive strategy and reproductive success. To ensure their reproductive success, L. chinense seems to pursue the strategy of augment to the number of reproductive organ, while L. tulipifera takes the way of improvement for the reproductive efficiency. Overall, the male reproductive success of L. chinense was higher than that of L. tulipifera, while its female reproductive success was lower than L. tulipifera.