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Title: The Effects of Breeding System on the Level of Genetic Variation in Haploids.
Author: Gliddon, C.
ISNI:       0000 0001 3500 9847
Awarding Body: University of Sussex
Current Institution: University of Sussex
Date of Award: 1975
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The effect of breeding system on the level of genetic variation is investigated using four species of liverworts. The implications of the haploid nature of the main stage in the life-cycle of liverworts are investigated using theoretical models. The amount of genetic variation present in natural populations of the liverworts is measured using the technique of polyacrylamide-gel electrophoresis. The results of the level of genetic variation in liverworts are discussed in relation to their breeding system. Pellia epiphylla is found to be extremely genetically uniform whilst the remaining three species have similar levels of variation. Whenthe liverworts are compared with similar surveys from the higher plants they are found to be relatively genetically depauperate. It is suggested that the relative lack of genetic variation of the liverworts may be due to their haploid nature, a large proportion of the variation in the diploid higher plants being selectively maintained by heterotic effects.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available