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为探究不同群体长牡蛎(Crassostrea gigas)形态性状对壳容积的影响及通过选育进行壳容积性状改良的可能性，本研究在中国选育群体、日本选育群体、韩国选育群体和野生群体中分别测量了113、246、53和79只牡蛎的壳长(SL)、壳宽(SW)、壳高(SH)和壳容积(V)。对不同群体进行了单因素方差分析、通径分析和遗传参数评估。单因素方差分析结果显示，选育群体的生长性状有了明显改良，其中中国选育群体改良最明显。通径分析结果显示，除韩国群体外，对壳容积影响最大的因素均为壳高，而在韩国群体中，壳宽对壳容积的影响最大。通过逐步回归方法建立了长牡蛎各个形态性状与壳容积之间的回归方程，其中中国选育群体为V=-19.087+0.248SL+0.216SH+0.506SW(R2=0.581),日本选育群体为V=-15.623+0.179SL+0.195SH+0.493SW(R2=0.557),韩国选育群体为V=-17.359+0.139SL+0.771SH+0.170SW(R2=0.718),而野生群体为V=-15.090+0.339SL+0.216SH+0.190SW(R2=0.765)。遗传参数评估结果表明，长牡蛎壳容积具有较高的遗传力(0.64),与形态性状的遗传相关性属于高等水平(0.57～0.83),表型相关性属于中到高等(0.49～0.66),长牡蛎的壳容积可以通过选育进行有效改良。本研究为长牡蛎壳容积的改良提供了理论依据和参考资料。
Abstract：To investigate the impact of body traits on cavity volume in different populations of the Pacific oyster, Crassostrea gigas, and the potential for improving cavity volume through selective breeding, we measured the shell length, shell width, shell height and cavity volume of 113, 246, 53, and 79 oysters from wild population and three selectively bred strains from populations of China, Japan, and Korea, respectively. The results indicated that the cavity volume of C. gigas was improved by selective breeding in different populations. Path analysis showed that the most influential factor on cavity volume was shell height except for the Korean population while shell width had the greatest impact on cavity volume in the Korean population. The regression equation between individual traits of C. gigas and cavity volume was established using stepwise regression method. For China selected strain, V=-19.087+0.248SL+0.216SH+0.506SW(R2=0.581); for Japan selected strain, V=-15.623+0.179SL+0.195SH+0.493SW(R2=0.557); for Korea selected strain, V=-17.359+0.139SL+0.771SH+0.170SW(R2=0.718); for wild population, V=-15.090+0.339SL+0.216SH+0.190SW(R2=0.765). Estimation of genetic parameter showed that cavity volume had very high heritability(0.64), genetic correlations with body traits were high(0.57～0.83), and phenotypic correlations were medium to high(0.49～0.66), which means that cavity volume could be effectively improved by selective breeding. Our findings furnished valuable insights for enhancing the genetic potential of cavity volume in C. gigas, thereby advanced the breeding efforts aimed at developing elite strains characterized by elevated meat yield.
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基本信息:
DOI：10.16441/j.cnki.hdxb.20240122
中图分类号:S917.4
引用信息:
[1]杨颜菲,杨奔,李琪,等.不同群体长牡蛎形态性状与壳容积的通径分析及遗传参数评估[J].中国海洋大学学报(自然科学版),2025,55(08):47-55.DOI:10.16441/j.cnki.hdxb.20240122.
基金信息:
山东省重点研究发展计划项目（2021ZLGX03）; 国家重点研究发展计划项目（2022YFD2400300）; 国家自然科学基金项目（32341060）; 国家贝类产业技术体系项目（CARS-49）资助~~
2025-07-04
2025-07-04