Deletion which removes the miRNA cluster containing the mir-306, mir-79 and mir-9b miRNAs. A pair of inverted attP sites flanking a single P1\loxP site are present at the site of the deletion.
Df(2L)mir-306-79-9b-KO/Df(2L)Exel6039 embryos show a significant increase in primordial germ cell number compared to controls.
Homozygous adults show significant defects in the hemolymph-brain barrier (as determined using a dye injection assay).
Homozygous males and females are fertile.