1. Mono- and polychromatic inner shell phenotype diversity in Pinctada margaritifera donor pearl oysters and its relation with cultured pearl colour
- Author
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Cédrik Lo, Serge Planes, Chin-Long Ky, Ecosystèmes Insulaires Océaniens (UMR 241) (EIO), Université de la Polynésie Française (UPF)-Institut Louis Malardé [Papeete] (ILM), Institut de Recherche pour le Développement (IRD)-Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Direction des Ressources Marines et Minières, Laboratoire d'Excellence CORAIL (LabEX CORAIL), Institut de Recherche pour le Développement (IRD)-Université des Antilles et de la Guyane (UAG)-École des hautes études en sciences sociales (EHESS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de La Réunion (UR)-Université de la Polynésie Française (UPF)-Université de la Nouvelle-Calédonie (UNC)-Institut d'écologie et environnement-Université des Antilles (UA), Centre de recherches insulaires et observatoire de l'environnement (CRIOBE), Université de Perpignan Via Domitia (UPVD)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Louis Malardé [Papeete] (ILM), Institut de Recherche pour le Développement (IRD)-Université de la Polynésie Française (UPF), Institut de Recherche pour le Développement (IRD)-Université des Antilles et de la Guyane (UAG)-École des hautes études en sciences sociales (EHESS)-École pratique des hautes études (EPHE)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de La Réunion (UR)-Université de la Polynésie Française (UPF)-Université de la Nouvelle-Calédonie (UNC)-Institut d'écologie et environnement-Université des Antilles (UA), and Université de Perpignan Via Domitia (UPVD)-École pratique des hautes études (EPHE)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
0301 basic medicine ,Oyster ,genetic structures ,[SDV.SA.ZOO]Life Sciences [q-bio]/Agricultural sciences/Zootechny ,[SDV.BID]Life Sciences [q-bio]/Biodiversity ,Aquatic Science ,Pinctada margaritifera ,03 medical and health sciences ,phenotypes Diversity ,Shell colour ,Single site ,biology.animal ,Pearl oyster ,cultured pearl colour ,14. Life underwater ,Inner shell ,biology ,Ecology ,[SDV.BA]Life Sciences [q-bio]/Animal biology ,04 agricultural and veterinary sciences ,biology.organism_classification ,eye diseases ,Cultured pearl ,Geographic distribution ,Horticulture ,030104 developmental biology ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,DONOR EVALUATION - Abstract
The pearl oyster Pinctada margaritifera has the specific ability to produce pearls with the widest range of colours among all pearl oyster species. This pearl colour diversity originates from the mantle biomineralising tissue (graft) of the donor oyster, which is originally responsible for the variety of colours of the inner shell surface. This study aimed to: 1) assess the geographic distribution and establish a first stocklist of the colourful oyster phenotypes used as donors in French Polynesia, and 2) investigate the phenotypic relation between inner shell colouration and the corresponding colour of harvested pearls. With the support of a pearl farmers' network, we investigated the different donor phenotype frequencies among five collection sites (Ahe, Apataki, Takaroa, TakumeandMangareva). This donor evaluation was made during grafting of pearl oysters (N=49,938) obtained from collector stations. Results showed that pearl production is mainly based on six common colourful donor phenotypes classified as monochromatic and polychromatic profiles, which shown different frequencies among the collection sites. Experimental grafts (N=4640)were then realised and subsequent culture conducted at a single site in order to avoid pearl colour variation due to environmental influences. Traceability between donors (N=232) and pearls (N=2776), revealed that: 1) yellow (gold) and aubergine (reddish) pearls could be mostly obtained by using the monochromatic yellowand red donor phenotypes, respectively, and 2) one third to one quarter of grey pearlswas inevitably harvested, whatever the polychromatic phenotype chosen as the donor, which leaves at least half the harvest composed of the attractive green and peacock colours. This preliminary stocklist of colour range together with analysis of the colour phenotype transmission between inner shell and pearl provide the basis for producing multiple pearl oyster “colour lines” through hatchery propagation and would be helpful for future selective breeding programs. Statement of relevance: Donor shell colour selection predict colours of pearls
- Published
- 2017
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