Non-homoeologous wheat-rye chromosomal translocations conferring resistance to greenbug |
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| Authors: | Bernd Friebe Wei Zhang John W Raupp Bikram S Gill David R Porter |
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| Institution: | (1) Wheat Genetics Resource Center and Department of Plant Pathology, Kansas State University, 66506-5502 Manhattan, KS, USA;(2) USDA-ARS, 1301 N. Western St., 74075 Stillwater, OK, USA |
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| Abstract: | Summary C-banding andin situ hybridization were used to determine the chromosomal constitution of the greenbug-resistant germplasm GRS 1204. The results showed that this line had the radiation-induced non-homoeologous wheat-rye translocation chromosomes T2AS-1RS·1RL and T2AL·2AS-1RS. C-banding analysis further revealed the presence of a wheat-Agropyron elongatum translocation chromosome T1BL·1BS-3Ae#1L in line GRS 1204, that was derived from  Teewon . The greenbug resistance of line GRS 1204 is similar to that of line GRS 1201 that was earlier shown to have the greenbug resistance geneGb6 located on the 1RS arm of the wheat-rye translocation chromosome T1AL·1RS. BecauseGb6 in line GRS 1204 is present on one of the non-homoeologous translocation chromosomes, agronomically line GRS 1201 should be the better adapted source ofGb6 resistance and be used in cultivar improvement. |
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| Keywords: | wheat-rye chromosomal translocations C-banding in situ hybridization greenbug resistance Triticum aestivum Secale cereale Schizaphis graminum |
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