小麦品种抗梭条花叶病性的遗传研究

以抗梭条花叶病的宁麦9 号、苏麦3 号、宁麦7 号及高感梭条花叶病的扬麦5 号、扬麦158、宁9415 为亲本,配制成13 个组合,在田间病圃鉴定了亲本、F1 、F2 和回交后代对小麦梭条花叶病的抗性表现。结果表明,小麦品种对梭条花叶病的抗性为细胞核遗传,这一性状受1～2 对基因控制,宁麦9 号和苏麦3 号各含有2 对抗病基因,宁麦7 号含有1 对抗病基因。抗病性为显性,感病性为隐性。并提出通过常规育种手段选育抗梭条花叶病的小麦品种是可行的

INHERITANCE OF RESISTANCE TO WHEAT SPINDLE STREAK MOSAIC VIRUS IN WHEAT VARIETIES

The inheritance of resistance to wheat spindle strak mosaic virus (WSSMV) in wheat varieties were studied in Nanjing, Jiangsu Province. Three resistant cultivars (Ningmai 9, Sumai 3 and Ningmai 7) and three highly susceptible ones (Yangmai 5, Yangmai 158 and Ningmai 9415) were chosen as parents of 13 crosses in this experiment. Resistance of the parents, F 1, F 2 and backcross progenies to WSSMV were identified under field condition. Based on the segregation ratios of resistant and susceptible plants in F 1, F 2 and backcross populations, it showed that the inheritable factors controlling WSSMV were in karyon and the resistance to the WSSMV was dominant and controlled by one or two genes, and susceptibility to the WSSMV was recessive. Ningmai 9 and Sumai 3 have two resistant genes and Ningmai 7 has one. The experiment indicated that it was feasible to develop the new wheat varieties with high yield potential and resistance to WSSMV through the conventional breeding procedures.