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| Comparison of Phenotypic Traits and Path Analysis of Three Species of Wild Pearl Oysters |
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| DOI：10.16768/j.issn.1004-874X.2019.01.018 |
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| Abstract: |
| 【Objective】 The objective of the study was to provide scientific reference for the development of new
species with excellent production performance and the selection of parents pearl oysters. 【Method】 One hundred wild
pearl oysters from each of three species (Pinctada fucata, Pinctada nigra and Pinctada radiata) were collected from natural
sea areas and their morphological traits (shell length, shell height, shell width and hinge length) and main economic traits
(wet weight, tissue weight and shell weight) were measured. The phenotypic traits were compared, and path analysis and multiple regression were used for data analysis. 【Result】The results showed that the average and maximum values of the
phenotypic traits of P. fucata were higher than those of P. nigra and P. radiata, and the shell height, shell width, hinge length
and flesh content of the P. radiata were higher than those of P. nigra. Among the correlation coefficients of all phenotypic traits,
except for the correlation between the shell height and shell width of the Pinctada radiata, the correlation of traits of other wild
pearl oysters reached an extremely remarkable level. Among the three species of wild pearl oysters, the morphological traits with
the maximum direct impact on the wet weight of the P. fucata, P. nigra and P. radiata were shell width (0.362), shell height
(0.517) and shell length (0.337), respectively. The morphological traits with the maximum direct impact on the tissue weight of
the P. fucata, P. nigra and P. radiata were shell width (0.379), shell height (0.388) and shell width (0.340) respectively. The
morphological traits with the maximum direct impact on the shell weight of the P. fucata, P. nigra and P. radiata was shell height.
【Conclusion】The morphological traits with the maximum direct impact on the wet weight of the three species of pearl oysters
are different, while the morphological traits with the maximum direct impact on shell weight are the same. |
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