Genetic relationship between koi herpesvirus disease resistance and production traits inferred from sibling performance in Amur mirror carp

Jinfeng Zhao, Martin Prchal, Christos Palaiokostas, Ross D. Houston, Antti Kause, Marc Vandeputte, Alain Vergnet, Jérôme Bugeon, Anastasia Bestin, Tomáš Veselý, Dagmar Pokorová, Veronika Piačková, Lubomír Pojezdal, Lucie Genestout, David Gela, Hana K. Kroupová, Martin Kocour

Research output: Contribution to journalArticlepeer-review

Abstract

Koi herpesvirus disease (KHVD)is currently the most serious threat to global carp farming. Prevention is a sensible strategy for tackling this disease and improved genetic resistance of carp strains is a desirable breeding goal. To study the potential for multi trait selection, the objective of the current study was to estimate the genetic correlations between KHVD resistance and production traits in Amur mirror carp.A total of 1500 fingerlings from four factorial crosses of five dams and ten sires were challenged with Koi herpes virus (K HV).Juvenile growth-related traits were collected on the same individuals before the challenge test. Production traits were measured on siblings of the challenged population at different lifestages (yearling to market size).The estimated heritability for resistance to KHVD was 0.43 ± 0.08 on the observed scale and 0.72± 0.13 on the underlying liability scale. Most genetic correlations between KHVD resistance and important production traits were insignificant, showing that selection for improved production traits would not increase susceptibility to KHV and vice versa.However,resistance to KHVD was negatively correlated with Fulton's condition factor(FC) after the second overwintering and relative head length(RHL), relative body height (RBH) and relative body width (RBW) from the second growing season to the market size, with a more prolonged body shape of Amurmirror carp (genes from Amur wild scaly carp, Cyprinus rubrofuscus) being associated with higher KHVD resistance. Intermediate favorable genetic correlations between KHVD resistance and log-log residuals of headless carcass yield(0.37 ± 0.14)and fillet yield(0.44 ± 0.13)at market size suggested that selection for improved yieldsof edible body parts might indirectly lead to a slight improvement in KHVD resistance and vice versa.
Original languageEnglish
Pages (from-to)734986
JournalAquaculture
DOIs
Publication statusPublished - 20 Jan 2020

Keywords

  • Common carp
  • KHVD
  • Body shape traits
  • Slaughter yields
  • Heritability
  • Genetic correlation

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