Mutations observed in mitochondrial DNA of salmon collected in Mano River, Fukushima Prefecture, Japan

Fitri, Muhammad and Kawada, Gyo and Enomoto, Masahiro and Tomiya, Atsushi and Watanabe, Masato and Morishita, Daigo and Izumi, Shigehiko and Nakajima, Masamichi (2020) Mutations observed in mitochondrial DNA of salmon collected in Mano River, Fukushima Prefecture, Japan. In: Low-dose radiation effects on animals and ecosystems. Springer, Singapore, pp. 89-98. ISBN 978-981-13-8217-8

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Abstract

On March 11, 2011, a great earthquake occurred off the east coast of Honshu Island, Japan. The consequent breakdown of the Fukushima Daiichi Nuclear Power Plant (FDNPP) caused a massive release of radionuclides into terrestrial and marine environments and into the atmosphere. The Abukuma Mountains region is one of the areas highly polluted by this accident. Freshwater fishes continued to live in this area after the FNPP accident became so polluted. Mitochondrial DNA (mtDNA) usually transfers from the mother to the next generation clonally. Therefore, it is one of the best genetic predictors of the effect of radiation on DNA. The influence of radiation can be presumed by comparing mtDNA between larval fish and their female parent. mtDNA of masu salmon was collected from an area highly polluted, namely, the upstream portion of Mano River, and compared it with that from nonpolluted cultured masu salmon. While no mutations were observed in the cultured masu salmon, those collected from Mano River exhibited three types of subdivisions in the Cytb region and two types of subdivisions in the D-loop region of mtDNA. These results suggest that exposure to radioactive cesium causes a base exchange in DNA. But the mutations observed were not serious enough to affect the masu salmon phenotype.

Item Type:	Book Chapter
Additional Information:	7829/76561
Uncontrolled Keywords:	mitochondrial DNA; radioactive; aquaculture; genetics
Subjects:	Q Science > QD Chemistry Q Science > QH Natural history > QH426 Genetics S Agriculture > SH Aquaculture. Fisheries. Angling > SH151 Aquaculture - Fish Culture
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science
Depositing User:	Dr Fitri Yusof
Date Deposited:	30 Jun 2020 12:24
Last Modified:	30 Jun 2020 12:24
URI:	http://irep.iium.edu.my/id/eprint/76561

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