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    Evolution of genome size within the genus Haliotis (Vetigastropoda: Haliotidae)

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    Date
    2018
    Author
    Adachi, Kenta
    Arai, Katsutoshi
    de la Peña, Milagros R.
    Moriyama, Shunsuke
    Okumura, Sei-Ichi
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    118
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    Abstract
    Genome size (C-value) and the percentage of adenine and thymine nucleotides in the genome (AT content) are fundamental characteristics of every species, and very important parameters in molecular cytogenetic and phylogenic studies, and for the progress of whole-genome sequencing. In this study, the C-value and AT content of nine abalone species inhabiting the Northwest Pacific (around Japan), Southeast Asia, South Africa, and Oceania were determined using flow cytometry. C-value ranged from 1.32 pg for Haliotis varia (Southeast Asia) to 2.01 pg for Haliotis laevigata (Oceania), and AT content ranged from 58.0% for Haliotis planata (Southeast Asia) to 66.3% for Haliotis diversicolor aquatilis (Southeast Asia). Reported chromosome numbers ranged from 2n = 32 to 36, and were higher in Oceanian, South African, and Northwest Pacific species (2n = 36) compared with the Southeast Asian group (2n = 32). This increase of chromosome number in the Oceanian species seems to be related to an increase in the DNA amount, unlike that of Haliotis midae (South African species). An increase of the C-value associated with an increase in DNA amount was also shown in the North Pacific group. These results suggest that increases in the DNA amount occurred independently in the ancestor of each of the different lineages.
    URI
    http://hdl.handle.net/10862/3561
    Suggested Citation
    Adachi, K., Arai, K., de la Peña, M. R., Moriyama, S., & Okumura, S.-I. (2018). Evolution of genome size within the genus Haliotis (Vetigastropoda: Haliotidae). Journal of Shellfish Research, 37(5), 1067-1072.
    DOI
    10.2983/035.037.0518
    Type
    Article
    ISSN
    0730-8000; 1943-6319
    Subject
    Haliotis varia; Haliotis laevigata; Haliotis planata; Haliotis diversicolor aquatilis; Haliotis midae; Abalones; Chromosome number; C-value; Pacific; Radiation
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