Comparison of the resistance of selected families of common carp, Cyprinus carpio L., to koi herpesvirus: preliminary study

Studying the Genetics of Resistance to CyHV-3 Disease Using Introgression from Feral to Cultured Common Carp Strains

“…Also variation in survival levels among families of the same genetic background, had been reported before (Dixon et al, 2009; Rakus et al, 2009; Ødegård et al, 2010; Piačková et al, 2013). Our results, however, showed that in F 1 between the resistant feral and the susceptible cultured strains, the trait variation among families was larger than for each of the parental lines.…”

“…One was variation between strains; most notably between the means of the feral (“S”) and the cultured strains (“Y,” “D,” “DxY,” and “Koi”). Variation in survival levels among different carp strains following CyHV-3 infection has been reported before (Shapira et al, 2005; Zak et al, 2007; Dixon et al, 2009; Rakus et al, 2009; Ødegård et al, 2010; Piačková et al, 2013; Ito et al, 2014). Some previous studies, but not all, shared our first observation, namely resistance of the feral strain in contrast to susceptibility of the cultured strains.…”

“…Since common carp is among the top 5 species produced in aquaculture and since outbreaks of this disease can lead to significant losses of 50–100% of the fish, CyHV-3 resistance is a desirable trait for inclusion in breeding programs. A few studies so far have looked at survival levels of different strains following infection by CyHV-3 (Shapira et al, 2005; Dixon et al, 2009; Ødegård et al, 2010; Piačková et al, 2013; Ito et al, 2014). Only a subset of these studies included F 1 crosses between strains in their analysis.…”

Cyprinid Herpesvirus 3

“…Shapira et al (2005) reported that crossing the domesticated carp and Našice (introduced in Israel from ex-Yugoslavia in the 1970s) with a wild carp strain Sassan (originated from the Amur river) significantly increases the resistance to CyHV-3 (Shapira et al, 2005). Carp genetic resistance to CyHV-3 has also been investigated using 96 carp families derived from diallelic crossbreeding of two wild carp strains (Amur and Duna, native of the Amur and Danube rivers) and two domesticated Hungarian strains (Tat, and Szarvas 15) (Dixon et al, 2009;Ødegård et al, 2010). These studies showed that overall the more resistant families derived from wild-type strains, even if important variations were observed according to the pair of genitors used (Dixon et al, 2009).…”

“…Carp genetic resistance to CyHV-3 has also been investigated using 96 carp families derived from diallelic crossbreeding of two wild carp strains (Amur and Duna, native of the Amur and Danube rivers) and two domesticated Hungarian strains (Tat, and Szarvas 15) (Dixon et al, 2009;Ødegård et al, 2010). These studies showed that overall the more resistant families derived from wild-type strains, even if important variations were observed according to the pair of genitors used (Dixon et al, 2009). Similarly, Piackova et al (2013) demonstrated that most of the Czech strains and crossbreeds which are genetically related to wild Amur carp were significantly more resistant to CyHV-3 infection than strains with no relation to Amur carp.…”