Assessment of hybrid vigor between flightless lines to restore survival and reproductive characteristics in the ladybird beetle Harmonia axyridis

Tomokazu Seko, Takahisa Miyatake, Kazuki Miura

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The effectiveness of hybrid vigor, which can counteract deleterious effects of inbreeding in flightless Harmonia axyridis Pallas (Coleoptera: Coccinellidae), was investigated. First, we performed the reciprocal cross between two isofemale lines and compared survival and reproductive characteristics between isofemale and hybrid lines under laboratory conditions. The survival of one of the hybrid lines was significantly higher than that of the two isofemale lines. Early fecundity tended to be higher in the two hybrid lines than in the two isofemale lines. Second, we compared the effectiveness of control of Aphis gossypii Glover (Homoptera: Aphididae) between isofemale and hybrid lines by release experiments in greenhouses. The number of A. gossypii was suppressed in treatments in which two hybrid lines were released compared with those in which two isofemale lines were released. These results suggest that hybrid vigor is effective as a method for assuring the quality of flightless H. axyridis.

Original languageEnglish
Pages (from-to)85-93
Number of pages9
JournalBioControl
Volume57
Issue number1
DOIs
Publication statusPublished - Feb 1 2012

Keywords

  • Biological control
  • Flightless
  • Harmonia axyridis
  • Inbreeding depression
  • Quality control
  • Reciprocal cross

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Insect Science

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