【摘要】 为估计泥蚶（Tegillarca granosa）生长与营养品质性状的遗传参数，以泥蚶“乐清湾1号”为亲本，采用巢式设计方法构建了30个全同胞家系，应用混合线性模型进行了遗传力和相关性估计。结果显示：泥蚶壳长、壳高、壳宽以及糖原含量的遗传力分别为0.23±0.08、0.31±0.09、0.30±0.09和0.34±0.09，均属于中等遗传力；湿质量和血红蛋白含量的遗传力分别为0.15±0.06、0.16±0.06，属于低等遗传力；总蛋白含量的遗传力为0.44±0.11，属于高等遗传力。对泥蚶壳长、壳高、壳宽、总蛋白和糖原含量等性状进行遗传改良，能获得更快的遗传进展。4个生长性状之间的表型相关（0.66～0.86）和遗传相关（0.77～0.99）均较高，3个营养品质性状（血红蛋白、总蛋白、糖原）之间及其与生长性状之间的表型相关和遗传相关均较低（r<0.2），通过选择生长性状来间接改良营养品质性状较困难。本研究将为泥蚶高品质性状的选择育种提供必要的遗传基础数据。更多还原

【Abstract】 To estimate the genetic parameters for growth and nutritional quality traits in Tegillarca granosa, this study used the “Yue Qing Wan No. 1” strain as parents and constructed 30 full-sib families using a nested mating design. Variance components and genetic parameters were estimated using a mixed linear model. The results showed that the heritabilities for shell length, shell height, shell width, and glycogen content were 0.23±0.08, 0.31±0.09, 0.30±0.09, 0.34±0.09, respectively, all indicating moderate heritability. The heritabilities for wet weight and hemoglobin content were 0.15±0.06, 0.16±0.06, respectively, indicating a low heritability. In contrast, the heritability for total protein content was 0.44±0.11, indicating a high heritability. These findings suggest that selectively breeding for shell length, shell height, shell width, total protein, and glycogen content would yield higher genetic progress. High phenotypic(0.66-0.86) and genetic(0.77-0.99) correlations were observed among the four growth traits. However, both phenotypic and genetic correlations among the three nutritional quality traits(hemoglobin, total protein, glycogen) themselves, and between these nutritional traits and the growth traits, were low(r<0.2). This indicates that indirect improvement of nutritional quality traits through selection for growth traits would be difficult. This study provides essential genetic baseline data for the selective breeding of Tegillarca granosa targeting high-quality traits.更多还原