Plant Systematics and Evolution

, Volume 160, Issue 3, pp 207–218

Apomixis versus sexuality in blackberries (Rubus subgen.Rubus, Rosaceae)

Authors

  • Hilde Nybom
    • Department of Systematic BotanyUniversity of Lund
Article

DOI: 10.1007/BF00936048

Cite this article as:
Nybom, H. Pl Syst Evol (1988) 160: 207. doi:10.1007/BF00936048

Abstract

InRubus L. a connection seems to exist between the degree of meiotic disturbances on the one hand, and the production of unreduced embryo sacs, pollen fertility and relative seed set on the other hand. Severe meiotic disturbances commonly encountered in apomictic taxa decrease pollen fertility and thereby seed set since pollen is necessary for endosperm development. By contrast interspecific hybrids between apomictic taxa appear to be sexual and exhibit high pollen fertilities, probably due to an improved meiosis. Thus, apomixis leads to a decreased fertility inRubus, not the opposite, as often discussed.

Key words

AngiospermsRosaceaeRubusApomixispseudogamycrossing experimentsmeiotic disturbancespollen fertilityseed set

Copyright information

© Springer-Verlag 1988