Abstract
Phenotypic class frequencies for alcohol dehydrogenase (ADH) isozyme patterns yielded by experimental and control sugarbeet seeds produced through agamospermy were analysed. Experimental apozygotic seeds were obtained from C0 plants treated with 0.1% colchicine (G) during seed germination. The controls were obtained from untreated plants. The numbers of phenotypic classes and their ratios in the offspring of control and colchicine treated sugarbeet plants provided evidence indicating that the main mode of agamospermous reproduction is sporophytic in the studied sugarbeet hybrid. Two of the 7 control offspring showed a 3:8:3 phenotypic ratio characteristic of gametophytic agamospermy and the experimental group did not show it. Based on the obtained results it is suggested that colchicine treatment increases the proportion of cells with high level of chromosome endoreduplication providing of embriogenesis through sporophytic agamospermy.
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Levites, E.V., Denisova, F.S., Kirikovich, S.S. et al. Ratios of phenotypes at the adh1 locus in the apozygotic offspring in sugarbeet (c1 generation). Sugar Tech 2, 26–30 (2000). https://doi.org/10.1007/BF02995582
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DOI: https://doi.org/10.1007/BF02995582