泥蚶哈维氏弧菌抗性性状遗传参数的估计OA北大核心

To explore the genetic parameters of the resistance traits of Tegillarca granosa when infected with Vibrio harveyi,artificial infection experiments were performed on 22 T.granosa families using the immersion infection method with V.harveyi.Three genetic assessment models were used to evaluate the genetic parameters of the growth and resistance traits of T.granosa.At the end of the experiment,the mortality rate of T.granosa was close to 70%,and there was a significant difference in the survival rate between families(6.7%-60%).The results re-vealed that the range of heritability of resistance traits ranged from 0.17±0.05 to 0.20±0.07,which belonged to low and medium heritability.Pearson and Spearman correlations were used to conduct a correlation analysis of the breeding values of each line.The correlation coefficients estimated by the three models ranged from 0.953 to 0.998,thus exhibiting a significant positive correlation,which indicates that the three models exhibited a similar ability to estimate the genetic parameters of resistance traits.The phenotypic and genetic correlations between the growth and resistance traits ranged from-0.069 to-0.111 and from-0.412 to-0.545,respectively,revealing no significant negative correlation.The above results indicate that the resistance traits of T.granosa belonged to medium and low heritability traits,which are suitable for breeding by family selection.There was no significant difference in the genetic correlation between the two traits,indicating that the growth and resistance traits can be selected separately during breeding.This study supplements our knowledge of the correlation between the genetic parameters of T.granosa resistance to V.harveyi and provides a reference for breeding valuable strains of T.granosa with resistance to V.harveyi.