缢蛏抗高温新品系的早期选育与筛选  

Early selective breeding and screening of new high temperature resistant lines of razor clam Sinonovacula constricta

作　　者：孟德龙 薛宝宝 申奔龙 牛东红[1] 李家乐[1] 沈和定[1] MENG Delong;XUE Baobao;SHEN Benlong;NIU Donghong;LI Jiale;SHEN Heding(Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources,Ministry of Education,National Demonstration Center for Experimental Fisheries Science Education,Shanghai Collaborative Innovation for Aquatic Animal Genetics and Breeding,Shanghai Ocean University,Shanghai 201306,China)

机构地区：[1]上海海洋大学省部共建水产种质资源发掘与利用教育部重点实验室水产科学国家级实验教学示范中心水产动物遗传育种中心上海市协同创新中心

出　　处：《大连海洋大学学报》2020年第1期71-74,共4页Journal of Dalian Ocean University

基　　金：上海高校水产学一流学科建设项目

摘　　要：为培育缢蛏Sinonovacula constricta抗高温品种(系),在10个全同胞家系中筛选3个耐高温家系(A、B、C),比较早期不同发育阶段缢蛏幼虫的半致死温度,并对各家系2、4、6、10、20、30日龄幼虫的生长、存活和抗高温性能进行了监测。结果表明:家系C较其他家系生长显著(P<0.05),在室内30、32、34、36、38℃温度下测定10(附泥期)、20、30日龄(出苗期)幼虫的半致死温度,发现同一时期内家系间的半致死温度有显著性差异(P<0.05),且家系C的存活率显著高于其他家系(P<0.05)。研究表明,以半致死温度为衡量指标,在缢蛏快生长选育系新品种“申浙1号”基础上进行家系耐高温定向选育,可实现在缢蛏家系幼体期耐高温性提前筛查,本试验结果可为耐高温品种选育工作提供基础数据。Three high-temperature resistant families of razor clam Sinonovacula constricta were screened from 10 whole sibling families of razor clam by growth,survival and high temperature resistance,and median-lethal temperatures(UILT 50)were compared in different days old larval stages of the 2,4,6,10(muddy period),and 20 and 30 water temperature of 30,32,34,36,and 38℃ to select the resistant high-temperature varieties(lines)of razor clam.The results showed that the family C had significantly better growth compared with the other two families(P<0.05),and that there was significant difference in the UILT 50 temperature among the families(P<0.05).The razor clam in family C had significantly higher survival rate than that in other families did.The findings indicate that UILT 50 temperature is used as a measure to carry out the breeding of the high temperature-oriented family on the basis of the new variety‘Shenzhe No.1’,which can achieve high temperature resistance screening in the larval stage of the family.

关 键 词：缢蛏 耐高温 半致死温度 生长 存活率 

分 类 号：S968.3[农业科学—水产养殖]