Journal
CROP SCIENCE
Volume 50, Issue 3, Pages 920-925Publisher
WILEY
DOI: 10.2135/cropsci2009.06.0310
Keywords
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Funding
- Kansas Wheat Commission
- Kansas Crop Improvement Association
- USDA-CSKEES
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Hessian fly, Mayetiola destructor (Say), is a destructive insect pest of common wheat (Triticum aestivum L.) and durum wheat (T turgidum L.) worldwide. Although 32 genes conferring resistance to Hessian fly have been identified, only a few genes are still effective in North America. A highly effective gene is H21, transferred to wheat from Chaupon rye via a whole-arm wheat-rye translocation T2BS.2R#2L. This translocation also carries a gene for field resistance to powdery mildew. To broaden the use of T2BS.2R#2L in wheat improvement, we attempted to reduce the length of the rye segment by recombination with another wheat-rye translocation T2BS.2BL-2R#2L. Recombination data indicated that the H21 locus was linked to the telomere; the powdery mildew locus was closely linked to the translocation breakpoint in T2BS.2BL-2R#2L. Recovered short-segment rye translocation chromosomes confer resistance to Hessian fly; however, no crossover event in the desirable configuration was recovered to produce a short-segment wheat-rye translocation with both H21 and the powdery mildew resistance gene. The T2BS.2BL-2R#2L recombinant chromosome was transferred to adapted winter and spring wheat cultivars.
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