The cardioblasts in stage 14 midScer\UAS.cRa; Scer\GAL4how-24B; Scer\GAL4twi.PG embryos are disorganised leading to frequent small and occasional large gaps in the developing dorsal vessel.
Scer\GAL4tin.cBa, midUAS.cRa, pntΔ88 has embryonic cardioblast phenotype
The expression of midUAS.cRa under the control of Scer\GAL4tin.cBa in a pntΔ88 mutant background converts many of the extra ostial cardioblasts into generic cardioblasts.