Journal of Zhejiang Agricultural Sciences ›› 2025, Vol. 66 ›› Issue (8): 1809-1818.DOI: 10.16178/j.issn.0528-9017.20250338

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Effect of morphological traits on weight traits of juvenile populations with two different shell colors in the white breeding line of Hyriopsis cumingii

CHENG Xiaoling1(), ZHAO Weihua2, ZHU Mingxing3, ZHANG Genfang4, LUO Yu4,*()   

  1. 1. Jinhua Aquatic Products Technology Promotion Station, Jinhua 321017, Zhejiang
    2. Jinhua Beihaishizhu Ecological Agriculture Development Co., Ltd., Jinhua 321102, Zhejiang
    3. Jinhua Academy of Agricultural Sciences, Jinhua 321000, Zhejiang
    4. Jinhua University of Vocational Technology, Jinhua 321017, Zhejiang
  • Received:2025-05-06 Online:2025-08-11 Published:2025-09-04
  • Contact: LUO Yu

Abstract:

Hyriopsis cumingii can be used for pearl cultivation, its soft body is edible and its shell can also be made into pearl nuclei. It is the most important pearl cultivating shellfish for freshwater pearls in China. To investigate the effects of morphological traits on weight traits of juvenile populations with two different shell colors in the white breeding lines of H.cumingii and to optimize the breeding strategies for mussels, and its application in different breeding scenarios, a total of 171 individuals each from the green-shelled white and yellow-shelled white lines were randomly selected. Four morphological traits (shell length, total height, shell height, and shell width) as well as three weight traits (live weight, shell weight, and soft body weight) were measured, and subsequently processed by covariance analysis, correlation analysis, path analysis, and stepwise multiple regression analysis. The results showed that there were certain differences in the morphological traits of juvenile populations with two different shell colors, and the traits were extremely significantly correlated (P<0.01), and the coefficient of variation of their weight traits was higher than that of morphological traits. The path analysis using weight traits as the dependent variable revealed that for the green-shelled white line, shell width has the greatest direct effect on both live weight and shell weight, while shell length has the greatest direct effect on soft body weight. For the yellow-shelled white line, total height has the greatest direct effect on all weight traits. The results of determination coefficient of the morphological traits on weight traits of juvenile populations with two different shell colors were consistent with the results of path analysis. The estimated values of the optimal regression equations of juvenile populations with two different shell colors constructed by stepwise multiple regression were not significantly different from the actual values, indicating that the optimal regression equations can be applied in practical breeding work. In conclusion, there are differences in the morphological traits of juvenile populations with two different shell colors of H. cumingii, and the core morphological traits affecting the live weight, shell weight and soft body weight are different. During the breeding process of H. cumingii, it is necessary to distinguish the shell color phenotypes and combine specific breeding scenarios to make the breeding work scienjpgic and reasonable.

Key words: Hyriopsis cumingii, shell color, morphological trait, weight trait, path analysis

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