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POPULATION GENETICS OF INVASIVE WEED
MIMOSA PIGRA L. (MIMOSOIDEAE) IN THAILAND
PAIROT PRAMUAL1*,
SUTTIRA KHUMKRATOK2 AND KOMGRIT WONGPAKAM2
Abstract:
Mimosa pigra
L. is widely considered one of the 100 worst invasive species. Native to
tropical America this species is now distributed worldwide where it
causes severe impact in many regions. Population genetic data could
provide important information for management of this species yet to date
such study is lacking. The objectives of this effort include assessment
of levels of genetic variation and genetic structure of M. pigra
in Thailand using RAPD markers. Samples were collected from 11
populations throughout Thailand. Relatively high levels of genetic
variation within populations were revealed, suggesting a lack of
substantial population bottlenecks. The overall FST
value of 0.271 (p<0.001) indicated considerable level of
population genetic structure. UGPMA dendrogram indicate three lineages
of M. pigra in Thailand. Principal coordinate analysis suggests
that populations are not grouping according to geographic origin.
Together, the results suggest that patterns of genetic variation and
genetic structure are likely due to multiple introductions of M.
pigra into Thailand.
1Department
of Biology, Faculty of Science, Mahasarakham University, Kantharawichai
District, Maha Sarakham, 44150 Thailand
2Walai
Rukhavej Botanical Research Institute, Mahasarakham University,
Kantharawichai
District, Maha Sarakham, 44150 Thailand
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