Pillon Yohan auteur aut IRD Munzinger Jérôme auteur aut IRD Amir H. auteur aut IRD Hopkins H. C. F. auteur aut IRD Chase M. W. auteur aut IRD text journalArticle eng text/pdf born digital access We reconstructed the evolutionary history of Codia, a plant genus endemic to the New Caledonia biodiversity hotspot in the southwest Pacific, using three single-copy nuclear genes. It seems likely that more than half of Codia species have a hybrid origin, but in the absence of cytological information, it is not known whether polyploids occur. Adaptation to ultramafic soils is possibly a plesiomorphic character for the entire genus. We found that species of hybrid origin can have some morphological characters absent in putative parental species, that is, they exhibit transgressive phenotypes. There is evidence of considerable range alteration post-origin in several species because some likely parental species of hybrid taxa no longer co-occur and are confined to putative rainforest refugia; in some cases, hybrid species do not now co-occur with either of their parental species. These results have implications for the design of conservation strategies, for example, prioritization of parental species for ex-situ conservation and preservation of the contact zones between soil types where hybridization is more likely to occur (i.e. conserving the possibility for the process to continue rather than trying to conserve taxa). specialized biogeography hybrid speciation island New Caledonia rainforest refugia serpentine 076 18 10 2263-2275 2009 0962-1083 https://www.documentation.ird.fr/hor/fdi:010046054 10.1111/j.1365-294X.2009.04178.x 0962-1083 [F B010046054] https://www.documentation.ird.fr/hor/fdi:010046054 https://www.documentation.ird.fr/intranet/publi/2009/05/010046054.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2009-06-08 2022-04-11 fdi:010046054 fre