Fertilized-eggs and larvae of strain “Zhongkehong” bay scallop (Argopecten irradians) and common cultured population (control) were separately produced by self-fertilization, hybridization, and mixed mating. The three types of offspring were hatched and cultured under 20 ℃, 23 ℃ and 26 ℃ respectively. Hatching rate, ten-day larval survival, larval shell length on day 1 and 10 were separately compared between two populations. Results showed that the hatching rate of fertilized-eggs from “Zhongkehong” was higher than that from the common cultured population. Ten-day survival of self-fertilized larvae from “Zhongkehong” was significantly higher than the control (P＜0.05), while offspring from hybridization and mixed mating were insignificantly lower (P＞0.05). Shell length of self-fertilized larvae (P＜0.05) and larvae of mixed mating from “Zhongkehong” were greater than their counterparts on day 1, but that of the hybrid larvae was significantly smaller than the common cultured population (P＜0.05). At age of 10 days, shell length of larvae produced by self-fertilization, hybridization (P＜0.05) and mixed mating from “Zhongkehong” exceeded the controls, indicating the growth advantage of “Zhongkehong” population. Temperature influenced the four larval traits significantly (P＜0.05) and “Zhongkehong” population was more tolerant to 20 ℃ and 26 ℃ than the control.