Application of heavy-ion-beam irradiation to breeding large rotifer

Author:

Tsuneizumi Kazuhide1,Yamada Mieko1,Kim Hee-Jin2,Ichida Hiroyuki1,Ichinose Katsunori1,Sakakura Yoshitaka2,Suga Koushirou2,Hagiwara Atsushi23,Kawata Miki4,Katayama Takashi4,Tezuka Nobuhiro4,Kobayashi Takanori5,Koiso Masahiko6,Abe Tomoko1

Affiliation:

1. Nishina Center for Accelerator-Based Science, RIKEN, Wako, Japan

2. Institute of Integrated Science and Technology, Graduate School of Fisheries Science and Environmental Sciences, Nagasaki University, Nagasaki, Japan

3. Organization for Marine Science and Technology, Nagasaki University, Nagasaki, Japan

4. Japan Sea National Fisheries Research Institute, Japan Fisheries Research and Education Agency, Miyazu, Japan

5. National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, Yokohama, Japan

6. Seikai National Fisheries Research Institute, Japan Fisheries Research and Education Agency, Ishigaki, Japan

Abstract

ABSTRACT In larviculture facilities, rotifers are generally used as an initial food source, while a proper size of live feeds to connect rotifer and Artemia associated with fish larval growth is needed. The improper management of feed size and density induces mass mortality and abnormal development of fish larvae. To improve the survival and growth of target larvae, this study applied carbon and argon heavy-ion-beam irradiation in mutation breeding to select rotifer mutants with larger lorica sizes. The optimal irradiation conditions of heavy-ion beam were determined with lethality, reproductivity, mutant frequency, and morphometric characteristics. Among 56 large mutants, TYC78, TYC176, and TYA41 also showed active population growth. In conclusion, (1) heavy-ion-beam irradiation was defined as an efficient tool for mutagenesis of rotifers and (2) the aforementioned 3 lines that have larger lorica length and active population growth may be used as a countermeasure of live feed size gap during fish larviculcure.

Funder

Japan Fisheries Agency

Publisher

Oxford University Press (OUP)

Subject

Organic Chemistry,Molecular Biology,Applied Microbiology and Biotechnology,General Medicine,Biochemistry,Analytical Chemistry,Biotechnology

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