cytoembryology

The peculiarities of seeded reprodaction of some species of Salicaceae family

Authors: Ugolnikova E. V.

During the cytoembriological investigation and the research of seed productivity of the species of Sаlicaceae family, growing in the different areas of Saratov region  the ability of gametophyte apomixic was found out in 5 populations of 5 species of willows. This way of seeded reproduction of Sаlicaceae family was noticed for the first time.

The distribution of gametophytic apomixis among the Asteraceae spesies from European part of Russia

Authors: Kochanova I. S., Lisitzkaya N. M., Kashin A. S.

In a course of investigation of seed productivity under the pollenless regime of flowering and cytogenetic investigation in 250 natural populations of 167 species of 62 the Asteraceae genera from European part of Russia gametophytic apomixis has been discovered in populations of 37 species from 20 genera. For the first time this mode of reproduction has been revealed in 26 species from 10  genera.

Research of gametophyte apomixic frequency of Fabaceae family species of Saratov region

Authors: Ermolaeva N. N., Kashin A. S.

During the cytoembriological investigation of the species of Fabaceae family, growing in the different areas of Saratov region the ability of gametophyte apomixic was found out of 4 species of Fabaceae. This way of reproduction of Fabaceae family was noticed for the first time.

Apomictic reprodaction way of willows (Salix L.)

Authors: Ugolnikova E. V.

During the cytoembriological investigation and the research of seed productivity of the species of Salix L. (Salicaceae), growing in the different areas of Saratov region the ability of gametophyte apomixic was found out in 12 populations of 8 species of willows. This way of seeded reproduction of willows was noticed for the first time.

The Cytoembryological Research of Apomixis Frequency of Chondrilla spesies of Europen Part of Russia

Authors: Ugolnikova E. V., Kashin A. S., Kondrateva (Popova) A. O.

As a result of cytoembryological analysis of megagametophytes of Chondrilla it was found out, that the plants of six species examined (C. juncea, C. graminea, C. canescens, C. brevirostris, C. latifolia and C. acantholepis) are characterised by the ability for seed reproduction by apomixis. It was discoverd that the frequency of disclosure of cytoembryological signs of apomixis considerably varies year by year and on the interpopulation level. C.