Liu J Q, Kolmer J A
Agriculture and Agri-Food Canada, Cereal Research Centre, 195 Dafoe Road, Winnipeg, MB, Canada R3T 2M9.
Plant Dis. 1997 Jul;81(7):757-760. doi: 10.1094/PDIS.1997.81.7.757.
The hard red spring wheat cultivar AC Domain and the Canada Prairie Spring wheat AC Taber have recently been licensed and released in western Canada and are resistant to leaf rust caused by Puccinia recondita f. sp. tritici. To determine the genetic basis of this resistance, the two cultivars were crossed with the leaf rust susceptible wheat Thatcher (Tc), and F plants were backcrossed to Thatcher. F families from Tc2/AC Domain and AC Taber/Tc2 were tested with isolates of P. recondita f. sp. tritici as seedlings in the greenhouse and as adults in the field rust nursery. Segregation of BCF families indicated that AC Domain had seedling resistance genes Lr10 and Lr16, and the adult plant gene Lr34. AC Domain was also hypothesized to have the adult plant gene Lr12 based on infection types with P. recondita f. sp. tritici isolates that differed for virulence to Lr12. The effective field leaf rust resistance of AC Domain was conditioned by Lr16 and Lr34. Segregation of BCF families and infection types of BCF-derived BCF plants indicated that AC Taber had Lr14a for seedling resistance, the adult plant gene Lr13, plus an additional uncharacterized adult plant resistance gene currently designated as LrTb.
硬红春小麦品种AC Domain和加拿大草原春小麦AC Taber最近已在加拿大西部获得许可并发布，它们对隐匿柄锈菌小麦专化型（Puccinia recondita f. sp. tritici）引起的叶锈病具有抗性。为了确定这种抗性的遗传基础，将这两个品种与感叶锈病的小麦品种撒切尔（Tc）杂交，并将F1植株与撒切尔回交。对来自Tc2/AC Domain和AC Taber/Tc2的F2家系在温室中作为幼苗以及在田间锈病圃中作为成株用隐匿柄锈菌小麦专化型的分离株进行了测试。BCF家系的分离表明，AC Domain具有幼苗抗性基因Lr10和Lr16以及成株抗性基因Lr34。基于对Lr12毒性不同的隐匿柄锈菌小麦专化型分离株的侵染类型，还推测AC Domain具有成株抗性基因Lr12。AC Domain有效的田间叶锈病抗性由Lr16和Lr34决定。BCF家系的分离以及BCF衍生的BCF2植株的侵染类型表明，AC Taber具有幼苗抗性基因Lr14a、成株抗性基因Lr13，以及另一个目前命名为LrTb的未鉴定的成株抗性基因。
