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However, the fitness of hybrids is unpredictable without direct quantification of their performance in fitness components across multiple generations. The land snails Bradybaena pellucida and B. similaris, which are indigenous and non-indigenous in Japan, respectively, copulate with each other simultaneously and reciprocally. However, only B. pellucida produces hybrids, because it ends mating by removing the penis before transferring a spermatophore, while B. similaris inseminates B. pellucida. To evaluate the strength of an intrinsic postzygotic barrier against the hybrids produced by B. pellucida, we conducted breeding experiments in the laboratory and measured six life-history traits: (1) growth rate, (2) body weight at maturity, (3) number of days to first oviposition after being permitted to mate, (4) clutch size, (5) fecundity, and (6) hatchability. We also calculated the relative intrinsic fitness based on five of these trait values (excluding clutch size). F(1) hybrids exhibited heterosis in growth rate, body weight at maturity and relative intrinsic fitness. F(2) hybrids also showed heterosis in body weight at maturity. Nevertheless, the F(2) hybrids produced significantly fewer progeny than the mid-point value of the parental species. Thus, the F(2) hybrids exhibited weak out-breeding depression in reproduction, offsetting their vigor in body size. 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Fitness Consequences of Reciprocally Asymmetric Hybridization Between Simultaneous Hermaphrodites
http://hdl.handle.net/10091/15955
http://hdl.handle.net/10091/15955090ffc1e-ec41-4430-b1e3-c051791250e4
名前 / ファイル | ライセンス | アクション |
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2012-09-11 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Fitness Consequences of Reciprocally Asymmetric Hybridization Between Simultaneous Hermaphrodites | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | PULMONATE BRADYBAENA-SIMILARIS | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | HELIX-ASPERSA MULLER | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | LAND-SNAIL | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | MATING-BEHAVIOR | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | REPRODUCTIVE COMPATIBILITY | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | PHYSA-ACUTA | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | DIVERGENCE | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | POPULATION | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | SPECIATION | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | GASTROPODA | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Wiwegweaw, Amporn
× Wiwegweaw, Amporn× Seki, Keiichi× Utsuno, Hiroki× Asami, Takahiro |
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信州大学研究者総覧へのリンク | ||||||
氏名 | Asami, Takahiro | |||||
URL | http://soar-rd.shinshu-u.ac.jp/profile/ja.uenpOakh.html | |||||
出版者 | ||||||
出版者 | ZOOLOGICAL SOC JAPAN | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | ZOOLOGICAL SCIENCE. 26(3):191-196 (2009) | |||||
書誌情報 |
ZOOLOGICAL SCIENCE 巻 26, 号 3, p. 191-196, 発行日 2009-05 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Depending on fitness consequences, hybridization may rescue inbred populations; generate premating barriers, reproductive interference, or hybrid species; or extinguish a species. However, the fitness of hybrids is unpredictable without direct quantification of their performance in fitness components across multiple generations. The land snails Bradybaena pellucida and B. similaris, which are indigenous and non-indigenous in Japan, respectively, copulate with each other simultaneously and reciprocally. However, only B. pellucida produces hybrids, because it ends mating by removing the penis before transferring a spermatophore, while B. similaris inseminates B. pellucida. To evaluate the strength of an intrinsic postzygotic barrier against the hybrids produced by B. pellucida, we conducted breeding experiments in the laboratory and measured six life-history traits: (1) growth rate, (2) body weight at maturity, (3) number of days to first oviposition after being permitted to mate, (4) clutch size, (5) fecundity, and (6) hatchability. We also calculated the relative intrinsic fitness based on five of these trait values (excluding clutch size). F(1) hybrids exhibited heterosis in growth rate, body weight at maturity and relative intrinsic fitness. F(2) hybrids also showed heterosis in body weight at maturity. Nevertheless, the F(2) hybrids produced significantly fewer progeny than the mid-point value of the parental species. Thus, the F(2) hybrids exhibited weak out-breeding depression in reproduction, offsetting their vigor in body size. These results indicate that only a weak postzygotic barrier, contrasting with strong F(1) heterosis, has evolved during genetic divergence of the two sibling species in allopatry. | |||||
資源タイプ(コンテンツの種類) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Article | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0289-0003 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10545874 | |||||
PubMed | ||||||
識別子タイプ | PMID | |||||
関連識別子 | http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?CMD=search&DB=pubmed&term=19341339 | |||||
関連名称 | 19341339 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.2108/zsj.26.191 | |||||
関連名称 | 10.2108/zsj.26.191 | |||||
権利 | ||||||
権利情報 | Copyright © 2009 Zoological Society of Japan | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
WoS | ||||||
表示名 | Web of Science | |||||
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