Genetic Variability and Differentiation of Both Cultured Strains and Natural Populations in the Guppy &lt;i&gt;Poecilia reticulata&lt;/i&gt;

Barinova, Anna Alexandrovna; Nakajima, Masamichi; Fujio, Yoshihisa

doi:10.2331/fishsci.64.898

Cited by 12 publications

(12 citation statements)

References 9 publications

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“…Such inbreeding within stocks is expected to increase over generations (as genetic variation decreases in parallel, e.g. Barinova et al, 1998) if consanguineous relationships appear in the broodstock, if differences exist among both, broodstocks at mating or egg survival (e.g. Sekino et al, 2003), and/or if no new variation is brought from the wild.…”

Section: Evolution Of Relatedness and Breeding Protocolsmentioning

confidence: 99%

First-generation genetic drift and inbreeding risk in hatchery stocks of the wreckfish Polyprion americanus

et al. 2016

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Section: Evolution Of Relatedness and Breeding Protocolsmentioning

confidence: 99%

First-generation genetic drift and inbreeding risk in hatchery stocks of the wreckfish Polyprion americanus

et al. 2016

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“…The genetic differences among strains were demonstrated using biochemical markers [7,8] and growth-and reproductive-related traits [9,10]. Since differences in thermal tolerance have been observed among strains established as closed colonies and subpopulations in the guppy, it was assumed that differences in thermal tolerance observed among strains are probably caused by genetic differences [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Estimation of the mode of inheritance of thermal tolerance in the guppy Poecilia reticulata

2009

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High water temperature influences the survival, growth, and maturation of fish. Genetically characterizing thermal tolerance is one of the most important subjects in fish culture. To identify the genetic characterization of thermal tolerance, this characteristic was compared among strains, and among parents and their offspring, in the guppy Poecilia reticulata. In the strain comparison, significant differences in survival rate were observed among the five strains examined, and between females and males. Females exhibited greater tolerance than males in four of five strains examined. In the comparison between parents and their offspring, stronger influence of female parent than of male parent was observed. Offspring obtained from surviving females exhibited greater tolerance than those from dead females. This tendency was typically observed in male offspring. The survival rate in male offspring obtained from dead female parents was lower than that of those from surviving females. The high-temperature tolerance of male parents did not influence this characteristic in offspring as strongly as that of female parents. These results suggest that the major gene or genes, which has a dominant resistant allele and a recessive sensitive allele, are probably passed on by sex-linked inheritance, located on the X chromosome.

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“…As a model organism for genetic analysis in fish, the guppy Poecilia reticulata is one of the most useful teleosts because of its short life cycle, ease of breeding and the establishment of many strains. 5,12,13 These strains have various kinships and various characteristics in terms of morphological and physiological traits. Salinity tolerance is one of the most important physiological traits in fish.…”

Section: Introductionmentioning

confidence: 99%

An experimental study on strain combinations in heterosis in salinity tolerance of the guppy Poecilia reticulata

2000

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SUMMARY: As an experimental model of heterosis in fish, the present study examined the amount of heterosis in salinity tolerance in four crosses between guppy strains having various kinships. Salinity tolerance was measured as survival time after transfer from fresh water to 35 ppt seawater. The amount of heterosis, expressed by the difference between the means of the parents and their F1 hybrids in every pair, was larger in the strain combinations having distant kinship than in those having close kinship. The result indicates that the average amount of heterosis is dependent on the magnitude of kinship between the strains. The average survival times of the F1 hybrids did not correlate with those of female parents, male parents, or mid‐parent values but correlated closely with the average amount of heterosis in the four strain combinations, indicating that the average phenotypic value of the F1 hybrids is not influenced by that of their parents but is dependent on the average amount of heterosis brought by the strain combination. Within each strain combination, variance in the amount of heterosis among pairs was larger in the strain combinations having close kinship than in those having distant kinship. These results indicate that the amount of heterosis was larger and more uniform in the strain combinations having distant kinship than in those having close kinship. The present study experimentally demonstrates that the strain combination having distant kinship is more useful for genetic improvement utilizing heterosis in fish.

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Genetic Variability and Differentiation of Both Cultured Strains and Natural Populations in the Guppy <i>Poecilia reticulata</i>

Cited by 12 publications

References 9 publications

First-generation genetic drift and inbreeding risk in hatchery stocks of the wreckfish Polyprion americanus

First-generation genetic drift and inbreeding risk in hatchery stocks of the wreckfish Polyprion americanus

Estimation of the mode of inheritance of thermal tolerance in the guppy Poecilia reticulata

An experimental study on strain combinations in heterosis in salinity tolerance of the guppy Poecilia reticulata

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