Colour polymorphism in common primrose (Primula vulgaris Huds.): many colours–many speciesстатья
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Дата последнего поиска статьи во внешних источниках: 8 августа 2017 г.
Аннотация:Primula vulgaris exhibits flower colour polymorphism
in the eastern part of its range, especially pronounced
on the NE coast of the Black Sea. This
polymorphism in the Caucasian populations has been
taxonomically described and some segregated species are
listed as rare and endangered. We used sequence variation
in two chloroplast noncoding regions (trnL–trnF and
rpll32–trnL) and the complete nuclear internal transcribed
spacer (ITS) of ribosomal DNA region to investigate correspondence
between flower colour and geographical distribution
of both nuclear and chloroplast haplotypes. It
appears that variability in these DNA regions does not
correlate with flower colour, being, however, clearly
structured geographically. We used nested clade analysis to
explore this geographical structure. It seems that the territory
of the Colchis refugium on the E coast of the Black
Sea contains both the highest flower colour and haplotype
diversities. The results suggest that common primroses
colonized the NE coast of the Black Sea from this
refugium, spreading along the coast westward. At the same
time, the analysis of ITS haplotypes indicates that P. vulgaris
colonized the Crimea from NW Anatolia. This makes
it clear that no segregated species can be recognized within
flower colour polymorphic P. vulgaris in the Caucasus
region. However, its phylogeography needs further detailed
study on a broader scale.