Production of Early Diploid Males by European Colonies of the Invasive Hornet Vespa velutina nigrithorax
Fig 1
Flow cytometric DNA histogram of diploid female (a), haploid male (b) and diploid male (c).
Each histogram shows the nuclear frequency with regard to DNA content for the head of a single individual. The first peak corresponds to ploidy level, the second peak to nuclei with a double DNA content and the third peak to polyploid nuclei. In haploid males, the second peak (2C) corresponds to nuclei from mandibular muscles where cells are diploids.