The Pannonian endemic species Vincetoxicum pannonicum was described
from specimens collected in Hungary and occurs at only few locations. It is
considered “vulnerable” according to the International Red List. The chromosome
set was reported to be tetraploid, and the species was hypothesized to be an
allotetraploid hybrid of the Balkan species V. fuscatum and the Adriatic species
V. hirundinaria subsp. adriaticum. We investigated the origin of V. pannonicum
using molecular phylogenetic methods by separately analyzing the multicopy
nuclear ribosomal internal transcribed spacer (nrITS) and the plastid-encoded
trnH-psbA DNA regions and by evaluating discrepancies between the produced
gene trees. Paralogs in the nrITS region clustered in two main groups, one
of which was closest to V. fuscatum, and the other included V. hirundinaria
subsp. adriaticum. According to trnH-psbA sequences, V. pannonicum and V.
hirundinaria subsp. adriaticum formed a single group. Our results show that V.
pannonicum diversified because of hybrid speciation, in which V. fuscatum was
the pollen donor. We discovered a similar placement of V. maeoticum, which
suggests a further hybridization event between V. fuscatum and a species of
the V. hirundinaria group. Our genome-size estimate indicates almost sixfold
larger genome size in V. pannonicum compared to the maternal diploid parent,
suggesting hexaploidy; however, V. pannonicum is tetraploid. This may suggest
cytological diploidization in the allopolyploid V. pannonicum. We observed
substantial genetic distance between V. hirundinaria subsp. adriaticum and all
other subspecies of V. hirundinaria, and we therefore propose that V. adriaticum
should be regarded as a separate species.
Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies
Informacja
SZANOWNI CZYTELNICY!
UPRZEJMIE INFORMUJEMY, ŻE BIBLIOTEKA FUNKCJONUJE W NASTĘPUJĄCYCH GODZINACH:
Wypożyczalnia i Czytelnia Główna: poniedziałek – piątek od 9.00 do 19.00