| Abstrakt: |
Allozyme spectra of peroxidase, esterase, superoxid dismutase, tyrosinase, alcohol dehydrogenase, lactate dehydrogenase, and acid phosphatase were examined in populations of sexual (Taraxacum serotinumandPilosella echioides) and apomictic (T. officinaleandP. officinarum) plant species. The heterozygosity in these populations (0.455-0.620) proved to be considerably higher than the average level characteristic of plant populations (0.058-0.185). The populations examined did not differ in the mean phenotype number µ, i.e., they exhibited the same diversity (3.188-3.380). The proportion of rare phenotypeshalso did not differ between the sexual and apomictic species of the same genus, whereas this parameter in thePilosellapopulations (0.150-0.174) was significantly higher than in theTaraxacumones (0.093-0.114). The populations were characterized by numerous isozyme spectra (more than 11 per populations) and displayed multiple allelism (the mean allele frequency was 3.63-4.38 per locus). They exhibited a high percentage of rare (occurring at a frequency lower than 5%) spectra (35-80%). This indicates that agamic complexes, to which these populations belong, may have a more complicated genetic structure of both apomictic and sexual populations than the species that do not belong to agamic complexes. [ABSTRACT FROM AUTHOR] |
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