CAJ | 학술논문

对“鲆优1号”牙鲆(Paralichthys olivaceus)进行育种性能分析,并研究育种值选择在牙鲆育种中的应用.测量了2425尾450日龄左右“鲆优1号”牙鲆全长和体质量.采用SPSS软件进行表型参数分析,运用DMU软件,采用 REML 法进行方差组分估计,并通过 BLUP 方法预测个体估计育种值(EBV).根据表型值和育种值的比较结果进行亲本选留.结果显示,运用DMU软件包估计牙鲆全长和体质量遗传力分别为0.266、0.302.全长、体质量育种值与表型值相关系数分别为0.685和0.677,都表现为极显著相关(P<0.01).经家系间比较,“鲆优1号”牙鲆的表型值均值和育种值均值都高于其他家系,表现出了明显的生长优势和很好的育种性能.按照30%的选择强度分别根据育种值、表型值选留优良家系,两种方式选留家系的相同率为71.43%.将育种值选择与表型值选择进行比较发现,全长和体质量的育种值选择效率分别比表型选择高35.38%、32.29%,说明育种值选择优于表型选择.
대“평우1호”아평(Paralichthys olivaceus)진행육충성능분석,병연구육충치선택재아평육충중적응용.측량료2425미450일령좌우“평우1호”아평전장화체질량.채용SPSS연건진행표형삼수분석,운용DMU연건,채용 REML 법진행방차조분고계,병통과 BLUP 방법예측개체고계육충치(EBV).근거표형치화육충치적비교결과진행친본선류.결과현시,운용DMU연건포고계아평전장화체질량유전력분별위0.266、0.302.전장、체질량육충치여표형치상관계수분별위0.685화0.677,도표현위겁현저상관(P<0.01).경가계간비교,“평우1호”아평적표형치균치화육충치균치도고우기타가계,표현출료명현적생장우세화흔호적육충성능.안조30%적선택강도분별근거육충치、표형치선류우량가계,량충방식선류가계적상동솔위71.43%.장육충치선택여표형치선택진행비교발현,전장화체질량적육충치선택효솔분별비표형선택고35.38%、32.29%,설명육충치선택우우표형선택.
The Japanese flounder (Paralichthys olivaceus) is widely cultured throughout the coastal areas of North China. In recent years, the species has exhibited growth rate depression, decreased fertility, and decreased disease resistance because of a number of factors, including changes in the environment and decreased quality of parent fish. Thus, the development of fast-growing offspring by cross breeding and selection would aid the sustainable development of the Japanese flounder culture industry. We used several parental lines of Japanese flounder with the traits of disease resistance and fast growing and Korea stock (KS) to establish 24 families, including a“Ping You NO.1”family. We measured the total length and body weight of these families at 450 days after hatching. We estimated the heritability of total length and body weight using a restricted maximum likelihood approach. The breeding value of all animals at 450-day was predicted using best linear unbiased prediction. The heritability of total length and body weight were 0.266 and 0.302, respectively, suggesting both traits have moderate heritability. The correlation coefficients between breeding values and phenotypic values of the growth traits were 0.685 and 0.677 (both P<0.01). Both growth and breeding ability were higher in Ping You No.1 than in the other families. We used a selection standard of~30%, and found that 71.43%families of all were the same, selected based on breed-ing value and phenotypic value, respectively. Comparison of selection efficiency based on breeding value or phe-notypic value revealed that the breeding value was better than the phenotypic value for growth traits: 35.38% to total length and 32.29%to body weight.