文章摘要
牙鲆“鲆优2号”不同养殖地点生长和存活性状的基因型与环境互作分析
Genotype by environment interactions for growth and survival traits of “Pingyou No. 2” flounder (Paralichthys olivaceus) in different aquaculture environment
投稿时间:2019-08-16  修订日期:2019-10-22
DOI:
中文关键词: 牙鲆  “鲆优2号”  生长  存活  遗传参数  基因型与环境互作
英文关键词: olive flounder (Paralichthys olivaceus)  “Pingyou No. 2”  growth  survival  genetic parameter  genotype by environment interaction
基金项目:
作者单位E-mail
李仰真 中国水产科学研究院黄海水产研究所 liyz@ysfri.ac.cn 
杨英明 中国水产科学研究院黄海水产研究所  
刘洋 中国水产科学研究院黄海水产研究所  
卢昇 中国水产科学研究院黄海水产研究所  
吴垚磊 中国水产科学研究院黄海水产研究所  
赵玉柱 中国水产科学研究院黄海水产研究所  
马腾 中国水产科学研究院黄海水产研究所  
程向明 唐山市维卓水产养殖有限公司  
程佳禹 唐山市维卓水产养殖有限公司  
陈松林 中国水产科学研究院黄海水产研究所 chensl@ysfri.ac.cn 
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中文摘要:
      为比较牙鲆“鲆优2号”在不同养殖地区的生长和存活性能,本研究利用连续多代对生长性状和抗迟缓爱德华氏菌病性状遗传参数评估和基因组选择的结果筛选出的亲本,建立28个“鲆优2号”家系,在河北(Site 1)和山东(Site 2)进行对比养殖实验,利用混合线性动物模型对生长和存活性状进行了基因型与环境互作分析。Site 1和Site 2的平均日增重分别为1.5 g/d和1.2 g/d,养殖成活率分别为81.4%和82.2%,“鲆优2号”在两个养殖地点的生长和抗病性能均表现优异。不同养殖环境间收获体重和存活性状的遗传相关分别为0.57 (<0.7)和0.82 (>0.7),说明不同养殖环境间收获体重存在显著的基因型与环境互作效应,但是不同养殖环境间存活性状的基因型与环境互作效应不显著。以上研究结果表明,牙鲆“鲆优2号”新品种的在不同养殖地点的生长和存活性能均表现良好,为保证良好的推广效果,需要对牙鲆的制种方案进一步优化,针对不同的养殖地区进行“鲆优2号”苗种生产,或培育具有普适性的“鲆优2号”苗种,保证在不同养殖环境下的快速生长和高存活率优势。
英文摘要:
      Aiming to improve the growth and survival performance of “Pingyou No. 2” flounder in different aquaculture areas, in this study, broodstocks which were selected based on the results of genetic parameter estimation and genome selection for growth and resistance traits, are used to produce “Pingyou No. 2” families. In total, 28 families were produced. Then these families were cultured in different sites (Site 1: Hebei; Site 2: Shandong). Genotype by environment interactions for growth and survival traits were estimated based on mixed linear models. The average daily gain was 1.5 g/d and 1.2 g/d in Site 1 and Site 2 respectively, and the survival rate was 81.4% and 82.2% in Site 1 and Site 2 respectively. Both traits showed a superior performance in the 2 sites. The genetic correlations for harvest body weight and survival traits between both environments were 0.57 and 0.82 respectively, which indicating that there was a significant genetic by environment interaction effect for harvest body weight but not for survival. These results suggest that “Pingyou No. 2” flounder showed a good growth and resistance performance in different sites. The harvest body weight and survival traits still have certain selective potential. Hence, to ensure a good demonstration and extension results, it is needed to improve and optimize the seed production techniques (e.g., seeds with a well environmental adaptability) for achieving the dominance of fast growth and high survival rate of olive flounder in different aquaculture environments.
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