2013 Fiscal Year Final Research Report
Genetic and ecological studies of the origin and reproduction about hemi-clonal hybrids that were first found from marine fishes
| Project/Area Number |
23380107
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General fisheries
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| Research Institution | Hokkaido University |
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Principal Investigator |
MUNEHARA HIROYUKI 北海道大学, 北方生物圏フィールド科学センター, 准教授 (80212249)
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| Co-Investigator(Kenkyū-buntansha) |
ARAI Katsutoshi 北海道大学, 大学院・水産科学研究院, 教授 (00137902)
AWATA Satoshi 新潟大学, 自然科学系, 助教 (60569002)
HAYAKAWA Youichi 国際基督教大学, 教養学部, 研究員 (50384011)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 遺伝学 / 核型分析 / 動原体融合 / アイナメ / 半クローン / 雑種発生 / スジアイナメ |
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| Research Abstract |
Hexagrammos populations including the hemi-clone strains were analyzed with genetic markers. Ecological researches and artificial closs breeding suggested that hemiclonal strains were different from F1 hybrids between pure species and possess certain genetic materials to hemi-clonally reproduce. In addition one or two sets of chromosomes of hemi-clonal strains fused as the Robertson translocation. The clossbreeding experiments suggested that the translocation may be inducing factors of hemiclone reproduction.
A hypothesis concerning the longevity of hemiclonal strains was proposed based on these findings. Hemiclone hybrids usually mate with males of paternal ancestors, but the hybrid would possess the same genome composition as the hemiclone origin species if the hybrids mate with males of maternal ancestors. This type produces recombined gametes, so hemiclonal genome can produce renewal genetical diversity. Thus, the longevity of hemiclonal reproduction will be guaranteed.
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[Journal Article] Identification of hemi-clonal reproduction in three species of Hexagrammos marine reef fishes
Author(s)
Kimura, M., Horita, M., Abe, S., Arai, K., Kawata, M. & Munehara, H
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Journal Title
Peer Reviewed
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