A single wheatgrass chromosome reduces the concentration of barley yellow dwarf virus in wheat |
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| Authors: | R. I. S. BRETTELL P. M. BANKS Y. CAUDERON X. CHEN Z. M. CHENG P. J. LARKIN P. M. WATERHOUSE |
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| Affiliation: | CSIRO, Division of Plant Industry, P. O. Box 1600, Canberra City, ACT 2601, Australia;INRA, Station de Génétique et d'Amélioration des Plantes, CNRA, Route de Saint-Cyr, 78000, Versailles, France;Institute of Crop Breeding and Cultivation, Chinese Academy of Agricultural Sciences, Beijing, China;Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China |
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| Abstract: | Seedlings of a series of addition or substitution lines of wheat containing different Thinopyrum intermedium chromosomes were inoculated with the PAV and RPV serotypes of barley yellow dwarf virus (BYDV). Reduced virus titres in infected plants were ascribed to a single pair of homoeologous group 7 chromosomes from Th. intermedium in the disomic addition lines L1 and TAF 2. The group 7 chromosome is associated with red pigmentation of coleoptiles, which was also observed in two lines ditelosomic for the α arm of the chromosome. However, when infected with the PAV serotype of BYDV, the ditelosomic lines had normal virus titres and it is concluded that potential determinants of BYDV resistance are located on the β arm of the Group 7 chromosome. |
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