BIOSYSTEMATIC INVESTIGATIONS ON THE LADY FERN (ATHYRIUM-FILIX-FEMINA)

被引：58

作者：

SCHNELLER, JJ

机构：

[1] Institut für Systematische Botanik, Universität Zürich, Zürich, CH-8008

来源：

PLANT SYSTEMATICS AND EVOLUTION | 1979年 / 132卷 / 04期

关键词：

Antheridiogen system; Athyrium; breeding system; chromosome numbers; Filicopsida; gametophyte ecology; genetic and morphological variability; genetic load; Pteridophyta; sexuality;

D O I：

10.1007/BF00982389

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

In Europe Athyrium filix-femina has a constant chromosome number (2n = 80) and is sexual. The normal type of reproduction is intergametophytic crossing. In the gametophyte phase there is a hormone system which induces dark germination of spores and antheridium formation. Sporophytes originating from single prothalli show that a genetic load is present in all population examined. It appears not to be a simple allelic load but a complicated balanced system. Morphological variability can be interpreted as the expression of the genetic heterogeneity of populations. There are no crossing barriers, not even between insular populations hundreds of kilometers apart. © 1979 Springer-Verlag.

引用

页码：255 / 277

页数：23