Heterosis and Maternal Effects in Salinity Tolerance of the Guppy Poecilia reticulata

Takahito Shikano; Motoki Nakadate; Masamichi Nakajima; Yoshihisa Fujio

doi:10.2331/fishsci.63.893

Heterosis and Maternal Effects in Salinity Tolerance of the Guppy Poecilia reticulata

Takahito Shikano, Motoki Nakadate, Masamichi Nakajima, Yoshihisa Fujio

AGR - Agricultural Bioscience

Tohoku University

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

Salinity response in F₁ hybrids of the guppy was measured as survival time after subjecting mature fish to 35 ppt artificial seawater. The amount of heterosis was expressed by the difference between the means of the F₁ hybrids and the parental strains. The mean survival times of the F₁ hybrids were higher than the mid-parent values, indicating heterosis. The amount of heterosis differed among strain combinations. A positive correlation was observed between the survival times of the F₁ hybrids and the female parents but not between the F₁ hybrids and the male parents, indicating maternal effects. These results suggest that the heterosis observed in the F₁ hybrids is attributable to two components: the first is the non-maternal component induced by strain combinations and the second is the maternal effects of strain populations.

Original language	English
Pages (from-to)	893-896
Number of pages	4
Journal	Fisheries Science
Volume	63
Issue number	6
DOIs	https://doi.org/10.2331/fishsci.63.893
Publication status	Published - 1997 Dec

Keywords

Guppy
Heterosis
Maternal effect
Salinity tolerance
Strain difference

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10.2331/fishsci.63.893

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abstract = "Salinity response in F1 hybrids of the guppy was measured as survival time after subjecting mature fish to 35 ppt artificial seawater. The amount of heterosis was expressed by the difference between the means of the F1 hybrids and the parental strains. The mean survival times of the F1 hybrids were higher than the mid-parent values, indicating heterosis. The amount of heterosis differed among strain combinations. A positive correlation was observed between the survival times of the F1 hybrids and the female parents but not between the F1 hybrids and the male parents, indicating maternal effects. These results suggest that the heterosis observed in the F1 hybrids is attributable to two components: the first is the non-maternal component induced by strain combinations and the second is the maternal effects of strain populations.",

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AU - Shikano, Takahito

AU - Nakadate, Motoki

AU - Nakajima, Masamichi

AU - Fujio, Yoshihisa

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Heterosis and Maternal Effects in Salinity Tolerance of the Guppy Poecilia reticulata

Abstract

Keywords

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