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Home > Karyomorphology of three Halophila species (Hydrocharitaceae, Alismatales) from Haad Chao Mai National Park, Trang Province, Thailand
 
Karyomorphology of three Halophila species (Hydrocharitaceae, Alismatales) from Haad Chao Mai National Park, Trang Province, Thailand
Paper Type
Contributed Paper
Title
Karyomorphology of three Halophila species (Hydrocharitaceae, Alismatales) from Haad Chao Mai National Park, Trang Province, Thailand
Author
Ratana Hiranphan*, Phetai Hiranphan, Tidarat Puangpairote, Anchana Prathep and Ladda Eksomtramage
Email
ratana.h@psu.ac.th
Abstract:
 The taxonomic identification of some species of Halophila, a marine angiosperm genus in the Hydrocharitaceae family, remains complicated by morphological plasticity. Therefore, the karyotypes were determined for three Halophila species from Haad Chao Mai National Park, Thailand: H. beccarii, H. major and H. ovalis. The results showed that the chromosome numbers of all the studied Halophila were 2n = 18. However, there were inter-specific differences in the karyotype formulae. The karyotype formulae of H. beccarii, H. major and H. ovalis (2n = 6m + 4sm + 8st, 2n = 8m + 6sm + 4st, and 2n = 8m + 4sm + 6st, respectively) were distinctly different from those found in previous studies of specimens from Hong Kong, China and India. This indicates biogeographically karyotypic variation among populations. This is the first report of karyotypes of three Halophila species from Thailand. Several karyotype asymmetry indices were also examined. According to karyotype asymmetry index (A), Halophila beccari had the most asymmetrical karyotype (A = 0.33) that agreed with the highest subtelocentric chromosomes. These karyotype features can be applied to further studies, for example, taxonomy, physiology and chromosome evolution.
Start & End Page
57 - 63
Received Date
2019-06-26
Accepted Date
2019-10-24
Full Text
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Correspondence:
Author Name
Ratana Hiranphan* - Department of Biology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
Keyword:
Keyword
chromosome, Halophila, Haad Chao Mai National Park, karyotype,
Volume
Vol.47 No.1 (January 2020)
 




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