Heritability and Y-chromosome influence in the jack male life history of chinook salmon (Oncorhynchus tshawytscha)

Heath, Daniel D.; Rankin, Lisa; Bryden, Colleen A; Heath, John; Shrimpton, J. Mark

doi:10.1038/sj.hdy.6800141

Cited by 78 publications

(81 citation statements)

References 38 publications

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“…The results of Heath et al (2002) suggest the presence of genetic variation for age of sexual maturity on the Y chromosome of chinook salmon. We tested for this in our samples by comparing PEPB-1 allele frequency differences on the Y chromosome of males that matured at age 3 or 4 years within brood years.…”

Section: Salmonid Sex Chromosomesmentioning

confidence: 91%

“…Most studies that have identified the genetic basis of male reproductive strategies in fishes have found evidence for sexlinkage (reviewed in Heath et al, 2002). In addition, Goudie et al (1995) found that a pseudoautosomal allozyme locus (GPI-B) in channel catfish (Ictalurus punctatus) was associated with differences in growth rate.…”

Section: Salmonid Sex Chromosomesmentioning

confidence: 99%

“…For example, males tend to become sexually mature at earlier ages in many salmonid species. Heath et al (2002) have recently shown that alleles associated with early sexually maturity are present on the Y chromosome of chinook salmon. They found significantly greater narrow-sense heritability for early sexual maturity from sires (0.6270.21) than from dams (À0.1470.12).…”

Section: Salmonid Sex Chromosomesmentioning

confidence: 99%

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Linkage disequilibrium between the pseudoautosomal PEPB-1 locus and the sex-determining region of chinook salmon

2004

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Allele frequency differences between sexes and an excess of heterozygotes in males had suggested that the PEPB-1 locus is sex-linked in chinook salmon (Oncorhynchus tshawytscha). We here estimate less than 1% recombination between PEPB-1 and a growth hormone pseudogene known to be in the sex-determining region (SEX) in 374 progeny from eight experimental matings. We present modified maximum likelihood methods for estimating haplotype frequencies from population samples at a sex-linked locus in which functional alleles occur on both the X and Y chromosomes (pseudoautosomal loci). We find nearly complete linkage disequilibrium between PEPB-1 and SEX in 20 population samples from the Puget Sound region of Washington and southern British Columbia. However, allele frequencies at PEPB-1 were similar in males and females in 35 population samples from the coast of Washington and the Columbia River basin. Pseudoautosomal regions have been described in a broad taxonomic array of vertebrates and invertebrates, and they are likely candidate regions to find genes associated with differences in life history, morphology, or behavior between males and females.

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Section: Salmonid Sex Chromosomesmentioning

confidence: 91%

Section: Salmonid Sex Chromosomesmentioning

confidence: 99%

Section: Salmonid Sex Chromosomesmentioning

confidence: 99%

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Linkage disequilibrium between the pseudoautosomal PEPB-1 locus and the sex-determining region of chinook salmon

2004

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“…For Pacific salmon (Oncorhynchus spp. ), Heath et al (2002) has made good progress. Tagging individuals at the fry stage allowed us to test the hypothesis that sire size alters the set point of genetic thresholds of life history traits, detectable as differences in somatic growth around a decision period.…”

Section: Introductionmentioning

confidence: 97%

Genetic influence of parr versus anadromous sires on the life histories of Atlantic salmon (Salmo salar)

Duston¹,

Astatkie²,

MacIsaac³

2005

Can. J. Fish. Aquat. Sci.

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The potential for sire size to influence life history patterns from fry to sea age at maturity was established by rearing individually identified half-sibs of a single dam and either small (parr) or large (anadromous) sires in a common tank environment. Male sexual maturity was higher among progeny of small versus large sires at both parr (age 0+, 50% versus 32%, p = 0.065) and grilse stages (age 2+, 23% versus 10%, p = 0.034). In contrast, rates of female grilse (6.8%) and smolt age 1+ (>95%) were independent of sire size. Logistic regression indicated that grilse of small sires had an asymptote body weight (BW) 30% lower than grilse of large sires (1.0 versus 1.4 kg). In comparison, repeated measures analysis of BW, fork length (FL), and condition factor (CF) indicated that growth changes associated with grilsing were independent of sire size and sex. The highest-order interaction for which sire size was significant was day × sire × sex (p < 0.034). Independent of sire size, sexual maturation at both age 0+ and age 2+ was associated with a high CF, whereas smolting at age 1+ was associated with a high BW and FL but low CF.Résumé : Nous avons vérifié la possibilité que la taille du père influence les patterns du cycle biologique depuis le stade alevin jusqu'au stade marin à maturité en élevant individuellement des demi-frères et des demi-soeurs d'une même mère, mais d'un père de petite (tacon) ou de grande (anadrome) taille, dans un environnement d'aquarium commun. La maturité sexuelle des mâles est plus fréquente chez la progéniture des pères de petite taille que chez celle des pères de grande taille, tant au stade tacon (âge 0+, 50 vs 32 %, p = 0,065) qu'au stade madeleinau (âge 2+, 23 vs 10 %, p = 0,034). En revanche, les pourcentages de madeleinaux femelles (6,8 %) et de saumoneaux d'âge 1+ (>95 %) sont indépendants de la taille du père. Une régression logistique indique que les madeleinaux nés de pères de petite taille ont une masse corporelle (BW) à l'asymptote de 30 % inférieure à celle des madeleinaux issus de pères de grande taille (1,0 vs 1,4 kg). Par comparaison, des analyses répétées des mesures de BW, de la longueur à la fourche (FL) et du coefficient de condition (CF) indiquent que les changements de croissance associés à la transformation en madeleinaux sont indépendants de la taille du père et du sexe. L'interaction d'ordre le plus élevé dans laquelle la taille du père est significative est celle du jour × père × sexe (p < 0,034). Quelle que soit la taille du père, la maturation sexuelle aux âges 0+ et 2+ est associée à un CF élevé et la transformation en saumoneau à l'âge 1+ est reliée à des valeurs élevées de BW et de FL, mais à des valeurs faibles de CF.[Traduit par la Rédaction] Duston et al. 2075

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“…Jack males, in contrast, are smaller, mature more quickly, and obtain mates by sneaking fertilizations during spawning. These phenotypes appear to be genetically predetermined, possibly through the Y-chromosome (Heath et al 2002). Both are maintained within populations through negative frequency-dependent selection (Gross 1985), as an overabundance of either strategy would increase competition and reduce fitness.…”

Section: Alternative Mating Strategiesmentioning

confidence: 99%

Evolutionary demography of structured two-sex populations and sex ratios

Shyu¹

2015

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Males and females may differ in stage-specific survival, maturation, fertility, or mating availability. These demographic differences, in turn, affect population growth rates, equilibrium structure, and evolutionary trajectories. Models considering only a single sex cannot capture these effects, motivating the use of demographic two-sex models for sexually reproducing populations.I developed a new two-sex modeling framework that incorporates population structure and multiple life cycle processes through transition rate matrices. These models can be applied to a variety of life histories to address both ecological and evolutionary questions. Here, I apply the model to the effects of sex-biased harvest on populations with various mating systems.Demographic considerations also affect evolutionary projections.I derived matrix calculus expressions for key evolutionary quantities in my two-sex models, including the invasion fitness, selection gradient, and second derivatives of growth rates (which have many applications, including the classification of evolutionary singular strategies).I used these quantities to analyze the evolution of the primary sex ratio, under various sex-and stage-specific offspring costs and maternal conditions.Demographic two-sex models lend insight into complex, and sometimes counterintuitive, results that are not captured by models lacking population structure. These findings highlight the importance of demographic structure in ecology and evolution.

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Heritability and Y-chromosome influence in the jack male life history of chinook salmon (Oncorhynchus tshawytscha)

Cited by 78 publications

References 38 publications

Linkage disequilibrium between the pseudoautosomal PEPB-1 locus and the sex-determining region of chinook salmon

Linkage disequilibrium between the pseudoautosomal PEPB-1 locus and the sex-determining region of chinook salmon

Genetic influence of parr versus anadromous sires on the life histories of Atlantic salmon (Salmo salar)

Evolutionary demography of structured two-sex populations and sex ratios

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