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Table 1 Strain types in the P-M system

From: Diversity of P-element piRNA production among M' and Q strains and its association with P-M hybrid dysgenesis in Drosophila melanogaster

P susceptibility
high: >10%GD
low: <10%GD
P inducibility
low: <10%GD
high: >10%GD
strain type
high low M’
low low Q
low high P
high low M (P-elements (−))
  1. Drosophila melanogaster is divided into the four strain types by GD ratios. P susceptibility shows the regulatory capacity against the P-elements and P inducibility exhibits the ability to transpose P-elements in progeny