Sammanfattning

Genomic selection (GS) is increasingly applied in breeding programs of major aquaculture species, enabling improved prediction accuracy and genetic gain compared to pedigree-based approaches. Koi Herpesvirus disease (KHVD) is notifiable by the World Organization for Animal Health and the European Union, causing major economic losses to carp production. GS has potential to breed carp with improved resistance to KHVD, thereby contributing to disease control. In the current study, Restriction-site Associated DNA sequencing (RAD-seq) was applied on a population of 1,425 common carp juveniles which had been challenged with Koi herpes virus, followed by sampling of survivors and mortalities. GS was tested on a wide range of scenarios by varying both SNP densities and the genetic relationships between training and validation sets. The accuracy of correctly identifying KHVD resistant animals using GS was between 8 and 18% higher than pedigree best linear unbiased predictor (pBLUP) depending on the tested scenario. Furthermore, minor decreases in prediction accuracy were observed with decreased SNP density. However, the genetic relationship between the training and validation sets was a key factor in the efficacy of genomic prediction of KHVD resistance in carp, with substantially lower prediction accuracy when the relationships between the training and validation sets did not contain close relatives.

Nyckelord

KHVD; carp; RAD-seq; genomic selection; aquaculture breeding

Publicerad i

Frontiers in Genetics
2019, Volym: 10, artikelnummer: 543
Utgivare: FRONTIERS MEDIA SA

SLU författare

• Palaiokostas, Christos

  • Institutionen för husdjurens biovetenskaper, Sveriges lantbruksuniversitet
    
  • The Roslin Institute

Associerade SLU-program

SLU Nätverk växtskydd


UKÄ forskningsämne

Fisk- och akvakulturforskning


Publikationens identifierare

DOI: https://doi.org/10.3389/fgene.2019.00543

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/100703