2016年3月
Genetic evaluation of hatchery stocks of Honmoroko Gnathopogon caerulescens by mitochondrial DNA sequence for stock enhancement
FISHERIES SCIENCE
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- 巻
- 82
- 号
- 2
- 開始ページ
- 269
- 終了ページ
- 278
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1007/s12562-015-0958-4
- 出版者・発行元
- SPRINGER JAPAN KK
Honmoroko Gnathopogon caerulescens is a critically endangered species and important for commercial fisheries; thus stock enhancement programs are being conducted to restore resources. We evaluated the genetic population structure of field collected samples including spawned eggs around spawning areas in Lake Biwa and the extent of genetic diversity in wild samples and hatchery stocks using sequences of mitochondrial cytochrome b gene. Pairwise I broken vertical bar st analysis and AMOVA clearly showed minimal population structure and haplotype network did not reveal any clear geographic pattern in Lake Biwa. It is probable that strays spawn in non-natal spawning areas, resulting in significant levels of gene flow among spawning areas. Genetic characteristics of hatchery stock F1, F2, and F3 were similar to those of wild samples in terms of haplotype diversity, nucleotide diversity and pairwise I broken vertical bar st values. These results indicate that the relatively high genetic diversity at its initiation was retained due to a lot of broodstock over two successive generations. Accordingly we propose that the current Honmoroko breeding method is appropriate for conserving the genetic diversity of Honmoroko and that the hatchery stock are genetically compatable for release and stock enhancement.
- リンク情報
- ID情報
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- DOI : 10.1007/s12562-015-0958-4
- ISSN : 0919-9268
- eISSN : 1444-2906
- Web of Science ID : WOS:000372251400010