Please use this identifier to cite or link to this item:
Title: Investigation into the relationships and ancestry of Vulpia and Festuca.
Authors: Barker, Caroline M.
Award date: 1980
Presented at: University of Leicester
Abstract: The relationships between the European species of Vulpia were investigated by interspecific hybridisation and consequent meiotic analysis, hybrid fertility and morphological survey of the F1 hybrids. The relationship between the genus Vulpia and the Festuca rubra aggregate was investigated by the examination of both naturally occurring and artificially produced intergeneric hybrids. Embryo culture was used for both interspecific and intergeneric crosses and the germination of the hybrid embryos by this method proved successful. Of 47 cross combinations (including reciprocals) attempted hybrid plants were obtained for 20 different crosses. Crossability and hybrid fertility were not found to be obvious indicators of taxonomic distance and unilateral incompatibility was found both in crosses with a self-incompatible species as the female parent and a self-compatible species as the male parent and in crosses where both parental species were self-compatible. Analysis of bivalent pairing at meiosis revealed genome relationships in hybrids between diploid species. However no conclusions could be made as to the possible ancestors of tetraploid V. fasciculata. Artificial hybrids were made between V. sicula, the presumed link species between the annual species of Vulpia and the perennial fescues, and F. rubra and the meiotic analysis of the F1 hybrid revealed similarities between at least part of the V. sicula genome and a genome of F. rubra. Conclusions as to genome homology could not be made from the cytological analysis of the other intergeneric hybrids.
Type: Thesis
Level: Doctoral
Qualification: Ph.D.
Rights: Copyright © the author. All rights reserved.
Appears in Collections:Theses, Dept. of Biology
Leicester Theses

Files in This Item:
File Description SizeFormat 
U316353.pdf86.25 MBAdobe PDFView/Open

Items in LRA are protected by copyright, with all rights reserved, unless otherwise indicated.