17 half-sib families and 51 full-sib families of Hyriopsis cumingii were constructed by nested design. 40 individuals were randomly selected from each of these full-sib families when the individuals in the cages reached 1 cm, and the number was 2 040 in all. Shell length, shell height, shell width and body weight were measured of these individuals, and these data were used for genetic analysis. The heritability of these four traits was 0.356±0.047, 0.488±0.060, 0.453±0.055 and 0.518±0.050 respectively. The pheno-type correlation and genetic correlation was between 0.476 - 0.709 and 0.574 - 0.868. There was enough genetic variance for selective breeding and when we have selective breeding program on weight, the other three traits would have some genetic improvement at the same time.%利用巢式设计构建了三角帆蚌17个父系半同胞家系,包括51个全同胞家系.幼蚌规格达到1 cm时,在每个全同胞家系随机取40个个体,共2040个个体,测量它们的壳长、壳高、壳厚、体质量4个生长性状,并对测量数据进行了遗传分析.结果表明,壳长、壳高、壳厚、体质量这4个性状的遗传力分别为:0.356±0.047,0.488±0.060,0.453±0.055,0.518±0.050.这4个性状的表型相关和遗传相关的范围为:0.476～0.709和0.574～0.868.三角帆蚌早期阶段生长性状有足够的遗传方差,可以对它们进行遗传改良,预期能够获得较好的遗传进展.这4个性状之间的表型相关和遗传相关均较紧密,可以通过对体质量进行选择,同时改良其它性状.
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