关键词: 菲律宾蛤仔, 幼虫, 稚贝, 群体选育, 选择反应, 现实遗传力, 遗传获得 , Ruditapes philippinarum, larvae, juvenile, mass selection, selection response, realized heritability, genetic gain

Abstract: The Manila clam (Ruditapes philippinarum), production of which was 4 million tons in 2015, is a kind of important economic shellfish in China. In order to improve the productivity traits of R. philippinarum, a mass selection program for faster growth was carried out. The shell length of the second generation of R. philippinarum breeding line were compared with the controls in larval and juvenile stage. Selection response (SR), realized heritability (h_R^2), and genetic gain (GG) were also estimated. The average selection response, realized heritability and genetic gain were (0.516±0.297), (0.324±0.187), and (2.902±2.114) during larval stage, respectively, and were (0.300±0.262), (0.188±0.164), and (9.463±8.418) during juvenile stage,respectively. It is concluded that mass selection is an effective approach to improving growth traits in the stocks of R. philippinarum.