Increased production of genetic mosaics in Habrobracon juglandis by cold shock of newly oviposited eggs.
Eggs from an ebony stock exposed to 5-5 degrees C prior to syngamy exhibited increased production of genetic mosaics in comparison with untreated eggs from the same females. No increase in mosaic production occurred for cold-shocked cleavage-stage embryos from the ebony stock or from pre-cleavage cold-shocked eggs from a wild-type stock. Heat shock of pre-syngamy eggs also failed to increase the production of genetic mosaics. These findings are consistent with predictions based on the post-cleavage fertilization theory of mosaic origin in Habrobracon or with a hypothesis of differential mortality.
D000818:Animals; D002455:Cell Division; D002470:Cell Survival; D003080:Cold Temperature; D005260:Female; D005306:Fertilization; D006358:Hot Temperature; D006927:Hymenoptera / Q000196:embryology*; D009030:Mosaicism; D010063:Ovum; D013997:Time Factors; D014863:Wasps / Q000196:embryology*