Phenotypic polymorphism of Trifolium repens L.
Abstract
Aim. To analyze the polymorphism of Trifolium repens L. according to the pattern of «gray» spots on leaves growing in areas with different anthropogenic load. Methods. Analysis and determination of plant phenotypes according to Brewbaker, 1955; cluster analysis; determination of the proportion of different phenotypes and genotypes, the phen ratio index, indicators of intra-population diversity (µ), population similarity (r) and identity criterion (I). Results. In populations of T. repens, the diversity of phenotypic classes based on the pattern of the «gray» spot on the leaf was analysed for the first time. The largest number of fens is characteristic of park zones of the city of Zhytomyr – 11 (O, A, AH, B, C, E, D, BH, atypical form O, atypical form A, atypical form AH), the smallest – for the river bank (4 fens (O, C, A, B)), for meadows – 5 fens (O, B, A, AH, D). According to the criterion of identity, the genetic composition of the third population differs from the first two populations. For the first and second samples, the common phens are O, A, B; for the second and third – O, A, B, C, for the first and third – O, A, AH, B, D. Conclusions. Park zones are characterized by plants with an atypical leaf blade shape of three phenotypes (O, A, AH), as well as normal plants with phenotypes BH and E. For the studied populations of creeping clover from different areas, the common fens are O, A and B.
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