Inheritance of Resistance in ‘Luso’ Wheat to Hessian Fly
- C. M. Oellermann,
- F. L. Patterson and
- R. L. Gallun2
‘Luso’, a common wheat (Triticum aestivum L. em. Thell.) cultivar from Portugal, was studied to characterize its resistance to biotypes B and D of the Hessian fly [(Mayetiola destructor (Say)]. All experiments were conducted in controlled climate chambers and ventilated greenhouses at 20 ± 2 C. Progeny rows of self-pollinated F2 and testcross Ft plants were infested with biotype B or D of the Hessian fly and classified as resistant, segregating, or susceptible. Chi-square analyses were used to test genetic hypotheses. Luso possessed partial resistance to biotypes B and D of the Hessian fly. A single gene conferred this resistance to both of these biotypes. We found that the Luso gene is distinct from, and probably independent of, all genes previously characterized which confer resistance to biotype D of the Hessian fly (H5, H9, H10, and Hll). Therefore, the Luso factor was designated H12. The H12 gene is most likely located within the A or B genome of wheat.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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