{"refrec":{"BRefID":350721,"RR":"<b>Kitanobo, S.; Iwao, K.; Fukami, H.; Isomura, N.; Morita, M.</b> (2022). First evidence for backcrossing of F<sub>1</sub> hybrids in <i>Acropora</i> corals under sperm competition. <i>NPG Scientific Reports 12</i>: 5356. <a href=\"https://dx.doi.org/10.1038/s41598-022-08989-1\" target=\"_blank\">https://dx.doi.org/10.1038/s41598-022-08989-1</a>","BEntID":348417,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>NPG Scientific Reports 12</i>: 5356. <a href=\"https://dx.doi.org/10.1038/s41598-022-08989-1\" target=\"_blank\">https://dx.doi.org/10.1038/s41598-022-08989-1</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Kitanobo, S.; Iwao, K.; Fukami, H.; Isomura, N.; Morita, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Kitanobo, S. <i>et al.</i>","Englishabstract":"<i>Acropora</i> is a species-rich genus of reef-building corals with highly diverse morphologies. Hybridization among intercrossing species potentially influences species diversity within <i>Acropora</i>. However, the mechanisms that allow hybridization/backcrossing remain unknown. Although we tested a limited number of species, we hypothesized that <i>Acropora</i> gametes in the Indo-Pacific may preferentially fertilize conspecific gametes despite their compatibility with heterospecific gametes, leading to infrequent hybridization between potentially intercrossing species. In this study, F<sub>1</sub> hybrids of <i>Acropora florida</i> and <i>A. intermedia</i> showed specific fertilization trends. For example, sperm had the ability to backcross with the parental species even in the presence of sperm from the parental species. Also, eggs of the hybrids produced from <i>A</i>. <i>florida</i> eggs and <i>A</i>. <i>intermedia</i> sperm (“FLOint”) exhibited self-fertilization. Since a low ratio of hybridization between <i>A. florida</i> and <i>A. intermedia</i> is predicted, the population size of hybrids should be small. Therefore, self-fertilization would facilitate reproduction of the hybrid in nature, while remaining sperm could outcompete parental species sperm to backcross with eggs. Although we succeeded in breeding two colonies of hybrids, it is reasonable to speculate that hybrids show a high tendency to choose the most efficient sexual reproduction tactics.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"First evidence for backcrossing of F<sub>1</sub> hybrids in <i>Acropora</i> corals under sperm competition","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-14 01:32:03.848745","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2022,"MonPub":null,"DateUpdate":"2022-03-31","DateCreate":"2022-03-31","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000776283800027","VABBcode":null,"OpenAcc":1,"DOI":"10.1038/s41598-022-08989-1"},"refs":null,"anarec":{"AnaID":350721,"PubliDate":2022,"Pagination":"5356","XtraPublOfAnaID":null,"ISBN":null,"Volume":"12","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":208093,"SerRR":"Scientific Reports (Nature Publishing Group). 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