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

Takahito Shikano, Motoki Nakadate, Masamichi Nakajima, Yoshihisa Fujio

Research output: Contribution to journalArticle

16 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 languageEnglish
Pages (from-to)893-896
Number of pages4
JournalFisheries Science
Volume63
Issue number6
DOIs
Publication statusPublished - 1997 Dec

Keywords

  • Guppy
  • Heterosis
  • Maternal effect
  • Salinity tolerance
  • Strain difference

ASJC Scopus subject areas

  • Aquatic Science

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