【摘要】 小麦品种平原50被认为对条锈病有持久抗性。本文研究了其遗传结构,结果表明,平原50对8个参试条锈菌小种中的4个既具有控制低反应型的基因又具有控制低严重度基因,对3个小种类型仅具有控制低反应型的基因。对这7个小种的低反应型均不是由显性基因控制的,对另外1个小种的反应型可能是由显性基因控制的。更多还原

【Abstract】 Studies on the inheritance both of severity type(SE) and infection type (IT ) in Pingyuan 50, a wheat variety which is believed to be durably resistant to stripe rust. To the 8 races involved in the study, the variety reacts 0 - 3 ITs and shows less SE in comparison with Mingxian 169, a variety which was used as susceptible control. Analysis of crossing and segregation suggests that the two constituents of disease vary, in genetic nature, with races. To 4 of the 8 races in question, the less SE is conditioned by gene(s) independent of that responsible for low IT. To 3 races, no gene is found, which is relevant to less SE and is independent of gene(s) reponsible for low IT. To another race, low IT may be relevant to dominant gene(s).更多还原