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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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99
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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. (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
Subject
Haliotis varia AGROVOC; Haliotis laevigata; Haliotis planata AGROVOC; Haliotis diversicolor aquatilis; Haliotis midae AGROVOC; abalones AGROVOC; chromosome number AGROVOC; C-value; Pacific AGROVOC; radiation AGROVOC
Taxonomic term
Haliotis laevigata GBIF; Haliotis varia GBIF; Haliotis planata GBIF; Haliotis midae GBIF; Haliotidae GBIF
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  • AQD Journal Articles [1155]

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