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已经证明在小麦成株期,基因Lr13赋予对许多叶锈菌小种以抗性,但截止目前,尚未发现它在苗期提供抗性.Dych等观察到Lr13在三叶期是抗病的,而在一叶期则是感病的.虽然以前在一叶期未探测到抗性,但是将它用于品种改良仍然是有效的.如果在苗期能鉴定到这个基因,那么将它用于品种改良就更加方便.以前已经报道过温度能左右叶锈抗性基因表达的效应.有人发现降低培养温度可提供对燕麦冠锈病成株抗性在苗期表达的环境.本文描述了应用高温培养周期和病原物专化菌株在苗期鉴定Lr13基因的情况.
It has been demonstrated that at adult stage of wheat, the gene Lr13 confers resistance to many leaf rust races, but so far it has not been found to provide resistance at the seedling stage, Dych et al. Observed that Lr13 is resistant to disease at the trilobe stage, While it is susceptible at the first leaf stage.Although it was not previously detected at the first leaf stage, it is still effective to use it for breed improvement.If this gene can be identified at the seedling stage, it is used in It has been previously reported that the effect of temperature on the expression of leaf rust resistance genes was observed.It has been found that reducing the culture temperature provides an environment for plant resistance to crown rust of oats at the seedling stage.This paper describes the use of high temperature culture Period and pathogen specific strains identified Lr13 gene in seedling stage.