虾夷扇贝獐子岛红品系家系建立及生长发育的比较

采用不平衡巢式设计(♂∶♀=1∶3),建立了12个金贝广场挑选的獐子岛红虾夷扇贝父系半同胞(A、B、C……L)和36个母系全同胞(A1、A2、A3,B1、B2、B3,C1、C2、C3……L1、L2、L3)家系,比较各家系间浮游幼虫期和稚贝期的生长及存活指标,以评估虾夷扇贝"獐子岛红"品系的生长性状。结果表明,K3家系5日龄幼虫生长速度最快,比生长最慢的B3平均壳长大9.40%;I1家系在15日龄时生长速度最快,壳长为164.83μm,C3、D3家系25日龄壳长最大,较平均壳长高17.71%;D2家系120日龄稚贝壳高生长最快,较生长最慢的C1和D1家系平均壳高大40.41%;D2家系180日龄壳高依然最高,较H1平均壳高(18.3mm)高38.96%。I1家系幼虫存活率最高,较D1家系平均存活率高17.67%;F2家系稚贝存活率最高,显著高于其他试验组(P0.05,n=108)。综合36个同胞家系的各指标,D2、I1家系生长、抗逆性状最优,可作为优良品种选育的育种材料。

Establishment,Family Growth and Development in Zhangzidao Hong Strain of Yesso Scallop Patinopecten yessoensis

A total of 12 half‐sib families(A ,B ,C? ?L) and 36 full‐sib families(A1 ,A2 ,A3 ,B1 ,B2 ,B3 , C1 ,C2 ,C3 ,? ?L1 ,L2 ,L3 )were generated from the parents chosen from Gold Shellfish Square using a method of unbanlanced nest design to assess the phenotypic characters of Zhangzidao Hong strain of yesso scallop Patinopecten yessoensis ,in which the comparison of the growth and survival rate was performed at larval and juvenile stages in different families .The results showed that larvae in Family K3 had the best grow th in shell length at 5 days ,9 .40% higher than those in Family G3 ,significantly higher than that in Family A3 with the poorest growth .At 11 days ,Family I1 had better growth ,with shell length of 164 .83μm ;at 25 days there was the maximal shell length in Families C3 and D3 ,about 17 .71% higher than the av‐erage value of shell length .In juvenile stage ,at 120 days ,there was the maximal shell height in Family D2 ,about 40 .41% higher than those in Families C1 and D1 with the minimal shell heigh .At 180 days ,the best growth was observed in Family D2 ,about 38 .96% higher than that in Famil H1 (18 .3 mm) .The highest survival rate was observed in Family I1 at the larval stage ,17 .67% higher than that in Family D1 . At the juvenile stage ,however ,the highest survival rate was observed in Family F2 ,significant higher than in the others(P<0 .05 ,n=108) .The comprehensive comparison among all the 36 families revealed that the scallop in Family D2 and Family I1 had better grow th and survival ,indicating that they can be used as a fine variety of breeding materials .