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- W2967746853 abstract "Abstract The genus Rubus L. (Rosaceae) has as yet not been investigated satisfactorily in terms of palynology. This genus is taxonomically very difficult due to the large number of species and problems with their delimitation, as well as very different distribution areas of particular species. The aim of this study was to investigate pollen morphology and for the first time the ranges of intrageneric and interspecific variability of Rubus species, as well as verify the taxonomic usefulness of these traits in distinguishing studied taxa from this genus. They were analysed for 11 quantitative pollen characteristics and the following qualitative ones: exine ornamentation, pollen outline and shape, as well as bridge structure. Analyses were conducted on a total of 1740 pollen grains, which represent 58 blackberry species belonging to a majority of subgenera and all the sections and series found in Poland. The diagnostic characters included exine ornamentation (exine ornamentation type, width and direction of grooves and striae, number and diameter of perforations) and length of the polar axis (P). The arrangement of the examined species on the dendrogram does not corroborate division of the genus Rubus into subgenera, sections and series currently adopted in taxonomy. The lack of dependence may result from apomixis observed in Rubus , which could reduce natural variability. Pollen features should be treated in taxonomy as auxiliary, because they fail to differentiate several (10) individual species, while the other ones create groups with similar pollen traits." @default.
- W2967746853 created "2019-08-22" @default.
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- W2967746853 date "2019-08-13" @default.
- W2967746853 modified "2023-10-03" @default.
- W2967746853 title "Pollen morphology of Polish species from the genusRubusL. (Rosaceae) and its systematic importance" @default.
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- W2967746853 doi "https://doi.org/10.1101/734202" @default.
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