Test cross evidence for discrimination of wheat-rye complex translocation 1RS. 7DS, 1BL. 7DL and development of triple translocations 1RS. 7DS, 1BL. 7DL, 6VS. 6AL between Triticum aestivum L., Secale cereale L. and Hay naldia villosa L. Schur

摘要

Meiotic chromosome C-banding combining with multi-color genomic in situ hy-bridization(McGISH) of wheat Aimengniu V/92R137 F_1 provided another solid evidence that Aimengniu V contained a complex translocation 1RS. 7DS, 1BL. 7DL which could always pair with the normal 7D and 1B from 92R137 to form an expected chain-shape quadrivalent, while the 6VS.6AL from 92R137 and 6A from Aimengniu V always formed a rod bivalent, In F_2 progenies, two triple translocations homozygotes Q-2 and Q-3 between Triticum aestivum L., Secale cereale L. and Haynaldia villosa (L.) Schur. designated 1RS.7DS, 7DL.1BL, 6VS. 6AL were developed and well defined by both chromosome C-banding and McGISH , which both conferred well resistance to wheat powdery mildew.