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Contribution of donor and host oysters to the cultured pearl colour in Pinctada martensii

Authors

  • Gu Zhifeng,

    1. Key Laboratory of Tropical Biological Resources, MOE, Hainan Key Laboratory of Tropical Hydrobiological Technology, The Ocean College, Hainan University, Haikou, China
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  • Huang Fengshao,

    1. Key Laboratory of Tropical Biological Resources, MOE, Hainan Key Laboratory of Tropical Hydrobiological Technology, The Ocean College, Hainan University, Haikou, China
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  • Wang Hai,

    1. Key Laboratory of Tropical Biological Resources, MOE, Hainan Key Laboratory of Tropical Hydrobiological Technology, The Ocean College, Hainan University, Haikou, China
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  • Gan Kai,

    1. Key Laboratory of Tropical Biological Resources, MOE, Hainan Key Laboratory of Tropical Hydrobiological Technology, The Ocean College, Hainan University, Haikou, China
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  • Zhan Xin,

    1. Key Laboratory of Tropical Biological Resources, MOE, Hainan Key Laboratory of Tropical Hydrobiological Technology, The Ocean College, Hainan University, Haikou, China
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  • Shi Yaohua,

    Corresponding author
    1. Key Laboratory of Tropical Biological Resources, MOE, Hainan Key Laboratory of Tropical Hydrobiological Technology, The Ocean College, Hainan University, Haikou, China
    • Correspondence: S Yaohua and W Aiming, Key Laboratory of Tropical Biological Resources, MOE, Hainan Key Laboratory of Tropical Hydrobiological Technology, The Ocean College, Hainan University, Haikou 570228, China. E-mails: aimwang@163.com, stone70@126.com

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  • Wang Aiming

    Corresponding author
    1. Key Laboratory of Tropical Biological Resources, MOE, Hainan Key Laboratory of Tropical Hydrobiological Technology, The Ocean College, Hainan University, Haikou, China
    • Correspondence: S Yaohua and W Aiming, Key Laboratory of Tropical Biological Resources, MOE, Hainan Key Laboratory of Tropical Hydrobiological Technology, The Ocean College, Hainan University, Haikou 570228, China. E-mails: aimwang@163.com, stone70@126.com

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Abstract

Cultured free round pearls are produced by implanting a spherical nucleus with a small piece of nacre-secreting mantle graft from a donor oyster into the gonad of a recipient oyster (host). To examine the possible contribution of host and donor oysters to the colouration of the harvested pearls, the CSE-1 Imaging and Color-Measuring System were used to quantitatively measure the L*a*b* values of donor and host shells and the produced pearls in Pinctada martensii. Results showed that the colour of pearls had significant positive correlation (r = 0.1–0.22, P = 0.00) with that of donors, but had no correlation with that of host oysters, thus convincingly confirmed the contribution of nacre colour of donor to the realization of pearl quality of colour. To further clarify the relationship between the donor and the pearl colour, the donors from pearls of good and poor colour quality were further compared and the results demonstrated the significant difference in L* values (P < 0.05) and insignificant difference in a* and b* values, suggesting the necessity of selecting donors with bright and lustrous nacre in pearl production.

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