Domestic-wild hybridization to improve aquaculture performance in Chinook salmon

Semeniuk, Christina A.D.; Capelle, Pauline M.; Dender, Mitchel G.E.; Devlin, Robert H.; Dixon, Brian; Drown, Jane; Heath, John; Hepburn, R. I.; Higgs, Dennis M.; Janisse, Kevyn; Lehnert, Sarah J.; Love, Oliver P.; Mayrand, Jessica L.; Mickle, Megan F.; Pitcher, Trevor E.; Neff, Bryan D.; Semple, Shawna L.; Smith, Jennifer L.; Toews, Shelby; Wellband, Kyle; Venney, Clare J; Heath, Daniel D.

doi:10.1016/j.aquaculture.2019.734255

Cited by 14 publications

(16 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Within each population (seven wild crosses and one domestic cross), sperm from ten males was used to create ten half‐sibling families. Fertilization took place 2 November 2013, and eggs from each cross were divided and incubated in two replicate cells in vertical incubation trays (Semeniuk et al, ). At the onset of exogenous feeding (14 March 2014), fry from the two incubation replicates in each family were combined, and 120 fry were haphazardly removed and transferred to each of two replicate rearing tanks (200 L), we split families to account for tank effects.…”

Section: Methodsmentioning

confidence: 99%

Variation in juvenile Chinook salmon (Oncorhynchus tshawytscha) transcription profiles among and within eight population crosses from British Columbia, Canada

et al. 2019

Self Cite

View full text Add to dashboard Cite

Phenotypic differences among populations within a species have been reported for a variety of traits, ranging from life history to physiology to gene transcription. Population‐level phenotypic variation has been attributed to genetic differences resulting from genetic drift and/or local adaptation as well as environmental differences resulting from plasticity. We studied population‐ and family‐level variation in gene transcription for 22 fitness‐related genes, comprising immune, growth, metabolic, and stress processes in Chinook salmon (Oncorhynchus tshawytscha). We created hybrid Chinook salmon families from eight populations and treated them with an immune stimulus, a handling stress challenge, and held some as a no‐treatment control group. Population effects, sire effects, and narrow‐sense heritability (h2) were calculated for each candidate gene within each treatment group. We expected population to have a significant effect on gene transcription for many of our genes; however, we found a population effect for transcription at only one immune gene at rest. The limited number of significant population effects on gene transcription, combined with significant additive genetic variance within each population does not support the expectation of past strong selection pressures acting on heritable transcription profiles among populations. Instead, our results indicate that Chinook salmon likely adapt to their local environment through transcriptional plasticity rather than fixed differences. The expectation for fixed population‐level differences in gene transcription at fitness‐related genes, reflecting accepted models of local adaptation is high; however, comparisons among multiple populations using half‐sibling breeding designs are rare. Our work fills an important gap in our growing understanding of the process of among and within‐population divergence.

show abstract

Section: Methodsmentioning

confidence: 99%

Variation in juvenile Chinook salmon (Oncorhynchus tshawytscha) transcription profiles among and within eight population crosses from British Columbia, Canada

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…For instance, crossbreeding wild pigs with domestic breeds is an effective method of improving the production performance and meat quality of domesticated pigs (Chen & Sui 2018). Similar cases have also been reported in chinook salmon (Semeniuk et al 2019). Thus, identification of wild-relative introgression in domestic animals can help in understanding the role of ancestral diversity in defining the genetic diversity of modern animals (He et al 2019).…”

Section: Introductionmentioning

confidence: 69%

“…Similar cases have also been reported in chinook salmon (Semeniuk et al . 2019). Thus, identification of wild‐relative introgression in domestic animals can help in understanding the role of ancestral diversity in defining the genetic diversity of modern animals (He et al .…”

Section: Introductionmentioning

confidence: 99%

Genetic signature of hybridization between Chinese spot‐billed ducks and domesticated ducks

Guo

Wang

et al. 2020

Animal Genetics

View full text Add to dashboard Cite

In this study, we analyzed 93 whole genomes from Chinese spot-billed ducks (CSB), meattype ducks (MET), and egg and dual purpose-type ducks (EDT) to characterize the genetic material flowing between the CSB and modern ducks. Using a frequency of shared identicalby-descent method, approximately 10.9 Mb introgression segments containing 140 genes were identified showing the signatures of introgression between CSB and EDT. Meanwhile, nearly 10.6 M introgression regions containing 149 genes were identified between CSB and MET. Based on the haplotypes tree of each segment, we found that the introgression between CSB and domesticated ducks was asymmetric with a high level of gene flow from domestic to CSB and a low level of migration in the opposite direction. Moreover, we identified several genes that were introgressions from CSB and showed the signature of positive selection, which may contribute to the breeding of modern ducks. Our results provide new insight into the evolution and breeding history of domestic ducks and may be useful for the future management of wild and domestic duck populations.

show abstract

“…The domestic production cross (YIAL x YIAL) would serve as an internal control for comparative assessment between the hybrid crosses. Milt collection and all associated procedures are as described in Semeniuk et al (2019).…”

Section: Methodsmentioning

confidence: 99%

“…To minimize maternal effects (Wellband et al, 2017), eggs from 17 highly inbred female offspring of one self‐fertilizing hermaphrodite Chinook salmon from YIAL were used (see Komsa, 2012; Semeniuk et al, 2019). Briefly, hermaphrodite fish (genetically female, but phenotypically both male and female) were generated from incomplete sex reversal by exposing female larvae to 17‐alphamethyltestosterone (17aMT) treatments.…”

Section: Methodsmentioning

confidence: 99%

The impact of outbreeding on the immune function and disease status of eight hybrid Chinook salmon crosses after Vibrio anguillarum challenge

Semple

Heath

Filice

et al. 2021

Aquaculture Research

Self Cite

View full text Add to dashboard Cite

Aquaculture in North America is currently dominated by Atlantic salmon, but there has been an increasing interest in the production of species native to the Pacific coast.Chinook salmon is relatively new to production; therefore, the selection of appropriate stocks is critical. Often genes from wild populations are incorporated into farmed stocks to avoid performance decreases associated with inbreeding. The present study focuses on assessing the immunological performance of one inbred stock and seven outbred/hybrid crosses after challenge with the marine pathogen, Vibrio anguillarum.Throughout exposure challenge to both pathogen and sterile PBS, significant differences in mortality were observed between crosses. Fish were also assessed for major histocompatibility complex (MHC) class II β1 genotype, and although particular alleles did not confer resistance, crosses with better survival had more individuals presenting a heterozygous genotype. The stress induced during infection resulted in several individuals presenting signs of Bacterial Kidney Disease (Renibacterium salmoninarum) indicating that chronic co-infection may have contributed to susceptibility. When spleen samples from the highest and lowest performing hybrid crosses were assessed for cytokine and respiratory burst gene expression throughout bacterial challenge, high surviving crosses presented lower expression of inflammatory cytokine transcripts (IL-1β, IL-6 and TNFα) when compared to low performing crosses. Interestingly, microsatellite analysis revealed no significant differences in inbreeding coefficient or allelic richness between crosses despite observed variation in immune performance.Understanding the impact of outbreeding on the immune function of farmed, and often inbred, Chinook salmon could aid in future development of high-quality aquaculture stocks for this species.

show abstract

Domestic-wild hybridization to improve aquaculture performance in Chinook salmon

Cited by 14 publications

References 44 publications

Variation in juvenile Chinook salmon (Oncorhynchus tshawytscha) transcription profiles among and within eight population crosses from British Columbia, Canada

Variation in juvenile Chinook salmon (Oncorhynchus tshawytscha) transcription profiles among and within eight population crosses from British Columbia, Canada

Genetic signature of hybridization between Chinese spot‐billed ducks and domesticated ducks

The impact of outbreeding on the immune function and disease status of eight hybrid Chinook salmon crosses after Vibrio anguillarum challenge

Contact Info

Product

Resources

About