Genetic analysis of body weight in wild populations of medaka fish from different latitudes

Yassumoto, Tamiris I.; Nakatsukasa, Mana; Nagano, Atsushi J.; Yasugi, Masaki; Yoshimura, Takashi; Shinomiya, Ai

doi:10.1371/journal.pone.0234803

Cited by 5 publications

(6 citation statements)

References 55 publications

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“…This finding lends support to a hypothesis of size‐related positive heterosis wherein measures of fitness and fitness proxies such as size (Kingsolver and Pfennig 2004) may be elevated in first‐generation crosses but reduced in subsequent generations (Lamkey and Edwards 1999; Bartley et al 2000; Ou et al 2019). Similar findings were observed in laboratory crosses of a model fish, with F 1 hybrids being generally larger than F 2 hybrids and intermediate in size to the parental forms (Yassumoto et al 2020), and in cichlid fishes, for which fitness was greater in F 1 hybrids than in F 2 hybrids (Stelkens et al 2015). In contrast, for the Micropterus genus, a lack of heterosis has been observed across multiple physiological factors (Williamson and Carmichael 1986; Cooke et al 2001; Philipp et al 2002; Cooke and Philipp 2006; Allen et al 2009).…”

Section: Discussionsupporting

confidence: 67%

“…For weight-class definitions, see Figure 2; for genotype definitions, see Figure 3. (Yassumoto et al 2020), and in cichlid fishes, for which fitness was greater in F 1 hybrids than in F 2 hybrids (Stelkens et al 2015). In contrast, for the Micropterus genus, a lack of heterosis has been observed across multiple physiological factors (Williamson and Carmichael 1986;Cooke et al 2001;Cooke and Philipp 2006;Allen et al 2009).…”

Section: Discussionmentioning

confidence: 99%

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Lineage and hybridization effects on size potential in the Largemouth Bass complex

et al. 2023

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Objective: Introductions of Florida Bass Micropterus floridanus (FB) to Texas resulted in prevalent hybridization with Largemouth Bass M. salmoides (LB) and the creation of hybrid-dominated fisheries. However, little was known about the size potential of these hybrids relative to each other or relative to the parental taxa.Methods: Sampling of these taxa and their hybrids in Texas (populations = 166; n = 8685) and genotyping at taxon-diagnostic microsatellite loci facilitated comparisons of allele and genotype frequencies among weight-classes.Result: Results indicated that per capita, fish that were 100% FB were much more likely to attain moderate (≥3.63-kg) to large (≥5.9-kg) size than any other genotype in the species complex. Among hybrids, F 1 genotypes were likely to reach moderate to large sizes at rates similar to hybrids with high levels of FB alleles; otherwise, the likelihood of reaching large size scaled positively with levels of FB alleles. Hybrids with <50% FB alleles and fish that were 100% LB were almost non-existent in the moderate and large size-classes. A case study in Lake Fork (n = 510) provided similar results, although F 1 genotypes were more likely to reach large size than any other hybrid. Conclusion:These findings provide evidence for positive size-related heterosis in the F 1 generation and suggest that absent heterotic effects, size potential in hybrids is driven by many small additive-effect loci. K E Y W O R D Sage and growth, fisheries, genetics, hybrid, introgression, management, theory F I G U R E 1 Collection sites for statewide (Texas; black circles) and Lake Fork (gray circle) samples of Largemouth Bass, Florida Bass, and their hybrids. Sites with ShareLunker entries are marked with triangles.

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Section: Discussionsupporting

confidence: 67%

Section: Discussionmentioning

confidence: 99%

Lineage and hybridization effects on size potential in the Largemouth Bass complex

et al. 2023

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“…Despite extensive molecular efforts to understand the genomic architecture underlying these traits, incongruent findings suggest that growth and maturation in teleosts may not share large-effect genes or similar regulatory checkpoints (Ali et al, 2020;Gong et al, 2022;Wang et al, 2015;Yassumoto et al, 2020;Zhou et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Investigating the role of genetic variation in vgll3 and six6 in the domestication of gilthead seabream (Sparus aurata Linnaeus) and European seabass (Dicentrarchus labrax Linnaeus)

Moulistanos,

Nikolaou,

Sismanoglou

et al. 2023

Ecology and Evolution

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Gene function conservation is crucial in molecular ecology, especially for key traits like growth and maturation in teleost fish. The vgll3 and six6 genes are known to influence age‐at‐maturity in Atlantic salmon, but their impact on other fish species is poorly understood. Here, we investigated the association of vgll3 and six6 in the domestication of gilthead seabream and European seabass, both undergoing selective breeding for growth‐related traits in the Mediterranean. We analysed two different sets of samples using two different genotyping approaches. The first dataset comprised farmed and wild populations from Greece, genotyped for SNPs within the two genes (‘gene‐level genotyping’). The second dataset examined 300–600 k SNPs located in the chromosomes of the two genes, derived from a meta‐analysis of a Pool‐Seq experiment involving farmed and wild populations distributed widely across the Mediterranean (‘chromosome‐level genotyping’). The gene‐level analysis revealed a statistically significant allele frequency differences between farmed and wild populations on both genes in each species. This finding was partially supported by the chromosome‐level analysis, identifying highly differentiated regions may be involved in the domestication process at varying distances from the candidate genes. Noteworthy genomic features were found, such as a CpG island in gilthead seabream and novel candidate genes in European seabass, warranting further investigation. These findings support a putative role of vgll3 and six6 in the maturation and growth of gilthead seabream and European seabass, emphasizing the need for further research on their conserved function.

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“…Based on the investigation of responses of gonads under different photoperiods using populations collected in Hakodate (the northern location of Japan: cool-temperate zone) and Okinawa (the southern location of Japan: subtropical zone), a preliminary study suggested that local medaka populations from different latitudes had different responses to photoperiods [ 23 ]. Intra-specific variations in responses to changing photoperiods could contribute to investigating the genetic basis underlying photoperiod perception through forward genetic approaches using medaka [ 24 – 26 ].…”

Section: Introductionmentioning

confidence: 99%

Variation in responses to photoperiods and temperatures in Japanese medaka from different latitudes

et al. 2023

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Seasonal changes are more robust and dynamic at higher latitudes than at lower latitudes, and animals sense seasonal changes in the environment and alter their physiology and behavior to better adapt to harsh winter conditions. However, the genetic basis for sensing seasonal changes, including the photoperiod and temperature, remains unclear. Medaka (Oryzias latipes species complex), widely distributed from subtropical to cool-temperate regions throughout the Japanese archipelago, provides an excellent model to tackle this subject. In this study, we examined the critical photoperiods and critical temperatures required for seasonal gonadal development in female medaka from local populations at various latitudes. Intraspecific differences in critical photoperiods and temperatures were detected, demonstrating that these differences were genetically controlled. Most medaka populations could perceive the difference between photoperiods for at least 1 h. Populations in the Northern Japanese group required 14 h of light in a 24 h photoperiod to develop their ovaries, whereas ovaries from the Southern Japanese group developed under 13 h of light. Additionally, Miyazaki and Ginoza populations from lower latitudes were able to spawn under short-day conditions of 11 and 10 h of light, respectively. Investigation of the critical temperature demonstrated that the Higashidori population, the population from the northernmost region of medaka habitats, had a critical temperature of over 18 °C, which was the highest critical temperature among the populations examined. The Miyazaki and the Ginoza populations, in contrast, were found to have critical temperatures under 14 °C. When we conducted a transplant experiment in a high-latitudinal environment using medaka populations with different seasonal responses, the population from higher latitudes, which had a longer critical photoperiod and a higher critical temperature, showed a slower reproductive onset but quickly reached a peak of ovarian size. The current findings show that low latitudinal populations are less responsive to photoperiodic and temperature changes, implying that variations in this responsiveness can alter seasonal timing of reproduction and change fitness to natural environments with varying harshnesses of seasonal changes. Local medaka populations will contribute to elucidating the genetic basis of seasonal time perception and adaptation to environmental changes.

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Genetic analysis of body weight in wild populations of medaka fish from different latitudes

Cited by 5 publications

References 55 publications

Lineage and hybridization effects on size potential in the Largemouth Bass complex

Lineage and hybridization effects on size potential in the Largemouth Bass complex

Investigating the role of genetic variation in vgll3 and six6 in the domestication of gilthead seabream (Sparus aurata Linnaeus) and European seabass (Dicentrarchus labrax Linnaeus)

Variation in responses to photoperiods and temperatures in Japanese medaka from different latitudes

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