Genetic and cytological observations in primary and secondary triticale (X Triticosecale, Wittmack) in relation to fertility and resistance to Hessian fly (Mayetiola destructor, Say)

The Hessian fly (Mayetiola destructor, Say)(Diptera: Cecidomyiidae) is the most important insect pest of wheat and triticale in the Southeast United States. Of the sixteen identified Hessian fly biotypes, E and G composed 83 to 95% of the 1993 populations in northwest Florida. This research was conducted to identify those primary triticale lines which were sufficiently fertile and genetically stable to transfer Hessian fly resistance to adapted triticale; and to identify the Hessian fly resistance allele(s) carried by the tetraploid wheat (Triticum turgidum L.) CI 14908. The predictability of transferring Hessian fly resistance from this tetraploid wheat line to triticale was evaluated by screening primary triticale (CI 14908/Florida 401) and three triticale hybrids derived from crossing biotype E resistant primary triticales with susceptible secondary triticales. F...