Advances of Wheat Breeding for Barley Yellow Dwarf Virus Resistance by Biotechnology

摘要

Wheat yellow dwarf is a serious disease of wheat infected by barley yellow dwarf virus (BYDV). All wheat collections tested have been proven vulnerable to BYDV infection. However, Thinopyrum intermedium (Host) Barkworth and Dewey(syn. Agropyron intermedium (Host) P B), a hexaploid perennial Triticeae species(2n = 6x = 42. E_1E_2X = JJ~sSt), contains at least two genes resistant to BYDV located on the chromosomes of group 7 and group 2, respectively. The wheat-Th. intermedium addition line L1 carries the BYDV resistance gene located on the alien chromosome 7X, showing good resistance to PAV serotype of BYDV. Meanwhile, the wheat-Th. intermedium partial amphiploid Zhong4 Awnless carries another BYDV resistance gene, different from that of L1, located on the chromosome of group 2. It showes better resistance to GAV and GPV serotypes of BYDV. Amphidiploid CPI 113500 derived from Agropyron pulcherrimum also showes good BYDV resistance. Some derivative lines from these resistance sources were developed and they can be used for wheat breeding programm for BYDV resistance.