Genetic variability and differentiation of rainbow trout (Oncorhynchus mykiss) strains in northern and Eastern Europe

Gross, Riho; Lulla, Priit; Paaver, Tiit

doi:10.1016/j.aquaculture.2007.08.004

Cited by 29 publications

(31 citation statements)

References 22 publications

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“…For the remaining stocks (4E, 4F, 5Q, 6S, 6T, 6X and 11B) the situation is co mplex and it could be a sign of a management program of long-term crossings aimed to achieve specific select ion objectives and/or to a simp le conservation of genetic variability. In overall, the analysed populations are rather similar fro m the genetic point of v iew and the results confirmed the hypothesis of Gross et al (2007) of Californ ian origin for most of the European stocks.…”

Section: Discussionsupporting

confidence: 72%

“…To our knowledge, only two major studies on European rainbow trout strains have been published (Gross, Lulla, & Paaver, 2007;Glover, 2008) and no research on Italian rainbow trout is available in scientific literature; nonetheless, Italy is the sixth largest trout producer in the world and the first in the European Union, with a total production estimated in 37000 tons (2015 yearly production;FEAP, 2016). Trentino region has a climatic feature suitable for farming of rainbow trout which are reared there since 1885.…”

Section: Introductionmentioning

confidence: 99%

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Faccenda¹,

Lunelli²,

Gandolfi³

et al. 2018

Turk. J. Fish. Aquat. Sci.

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Italy is the first producer of rainbow trout in Europe (EU member) and Trentino farmers represent roughly 8% of this production, but genetic information of the stocks employed is still lacking. This study aimed to estimate the genetic variability of the rainbow trout stocks farmed in Trentino and to reconstruct the related admixture history. Sixty hundred and thirty -two animals belonging to 23 different stocks were analysed using microsatellite loci. Seventeen stocks showed negative values of inbreeding coefficient within population (F is ranging from -0.06 to -0.107). NJ tree of genetic distances among stocks showed distinct clusters reflecting, at least partially, the information coming from known history. Discriminant analysis of principal components evidenced only 2 main groups of trout whereas model-based cluster analyses could detect 7 genetically distinct groups, underlining an influence from an old commercial Danish stock. Rainbow trout in Trentino showed a recent history of admixture with a lower level of genetic differentiation among stocks when compared to wild populations (F ST = 7.7%). The results confirmed the rather similar genetic origin of the analysed populations, highlight ing the necessity to carefully manage the stocks to prevent phenomena of inbreeding and, more often, outbreeding depression.

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Section: Discussionsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

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Faccenda¹,

Lunelli²,

Gandolfi³

et al. 2018

Turk. J. Fish. Aquat. Sci.

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“…It seems that the obtained values from the present study were within the range of the observed values in other European countries. Furthermore, in Western Australia the introduced farmed-rainbow trout presented a similar range of F ST values with European countries (Gross et al, 2007), ranging from 0.016 to 0.404 with an average F ST value equal to 0.19 (Ward et al, 2003). On the contrary, both in the USA and in northern Iran the range of F ST values reported for the reared rainbow trout was low, ranging from 0 to 0.048 with an average F ST value 0.028 in the USA (Silverstein et al, 2004;Johnson et al, 2007) and from 0.062 to 0.080 with an average F ST value 0.072 in northern Iran, respectively (Yousefian et al, 2012).…”

Section: Discussionmentioning

confidence: 96%

“…Moreover, the level of differentiation among the farmed O. mykiss populations ranged from -0.0381 to a substantial high value of 0.3496 with an average F ST value of 0.056. In other European studies, such as the study among 12 European farmed rainbow trout strains (Gross et al, 2007) and the study of nine rainbow trout farms in Norway (Glover, 2008), the reported pairwise F ST values ranged from 0.04 to 0.36 with an average F ST value equal to 0.14 and from 0.001 to 0.127 with an average F ST value equal to 0.053, respectively. It seems that the obtained values from the present study were within the range of the observed values in other European countries.…”

Section: Discussionmentioning

confidence: 99%

“…Likewise, only two population genetic studies of reared O. mykiss have been conducted in Europe, the first referred to northern and eastern Europe (Finland, Denmark, Sweden, Norway, Estonia and Poland) (Gross et al, 2007) and the second regarding to Norwegian fjords (Glover, 2008). Particularly, according to Gross et al (2007) the majority of European strains presented similar levels of variation with Shasta strain derived from California, USA, apart from two Polish strains. In contrast, Glover's (2008) study revealed a considerable genetic variation within and among rainbow trout strains farmed in Norway, a fact that enabled management authorities to identify the farm of origin for escapees.…”

Section: Introductionmentioning

confidence: 99%

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Martsikalis¹,

Gkafas²,

Apostolidis³

et al. 2014

Turk. J. Fish. Aquat. Sci.

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The rainbow trout, Oncorhynchus mykiss, comprises a non-indigenous species of the European freshwater ecosystem. Due to its remarkable advantages of fast-growing and facultative adaptability in various habitats under different conditions, it has become the most dominant commercially reared species of freshwater aquaculture in Greece. Despite its economic importance, there is a dearth of population genetic studies regarding the origin of any posterior introduction by the private aquaculture sector. In this study, a polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) assay was used, in order to assess variation in five mitochondrial DNA protein-encoding regions and the control region, covering more than 5,500 bp of the 16,600 bp total mitochondrial genome size. The samples derived from 10 rainbow trout farms throughout Greece representative of the freshwater aquaculture sector. The conducted population structure analysis revealed two major clusters among the farmed-rainbow trout populations. Moreover, the overall genetic diversity was substantially attributed to the diversity within populations rather than among them. In any case, both factors obtained from AMOVA analysis were statistically significant. The obtained haplotype network reinforced the existence of two central haplotype clusters among the farmed-rainbow trout populations in the Greek freshwater aquaculture sector.

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Genomic Approaches in Aquaculture and Fisheries

Cancela

Bargelloni

Boudry

et al. 2010

Introduction to Marine Genomics

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Despite the enormous input into the worldwide development of fish and shellfish farming in the recent decades, in part as an attempt to minimize the impact of fishing on already overexploited natural populations, the application of genomics to aquaculture and fisheries remains poorly developed. Improving state-of-the-art genomics research in various aquaculture systems, as well as its industrial applications, remains one of the major challenges in this area and should be the focus of well developed strategies to be implemented in the next generation of projects. This chapter will first provide an overview of the genomic tools and resources available, then discuss the application of genomic approaches to the improvement of fish and shellfish farming (e.g. breeding, reproduction, growth, nutrition and product quality), including the evaluation of stock diversity and the use of selection procedures. The chapter will also discuss the use of genomic approaches to study and monitor natural fish and shellfish populations and to understand interactions within their ecosystems.

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Genetic variability and differentiation of rainbow trout (Oncorhynchus mykiss) strains in northern and Eastern Europe

Cited by 29 publications

References 22 publications

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Genomic Approaches in Aquaculture and Fisheries

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