Chondrilla

The quality of pollen and cytoembryological signs of gametophytic apomixis in the populations of Chondrilla l. species the Lower Volga region

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

It is shown that the plants of the five investigated species (C. juncea, C. graminea, C. ca-nescens, C. brevirostris, C. latifolia) are characterized by a high degree of defectiveness of pollen (60–80%) and the presence of cytoembryological marker signs gametophytic atomixis. This indicates a high probability of their ability to seed reproduction by apomixis. It is established that the frequency of detection of these signs varies significantly among years and between-population level. It is revealed that C.

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.