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小麦条锈病是世界范围内小麦上发生最为普遍的重要病害之一,种植抗病品种是防治该病的首选。N. strampelli是1974年我国从意大利引进的,在甘肃省陇南小麦条锈病常发易变区大面积种植30余年仍然保持良好抗病性,是一个典型的持久抗条锈性品种。为了测定其遗传特性,利用小麦条锈菌生理小种CY29、CY30和菌系Su-14在温室对N.strampelli与铭贤169及其杂交F1、F2和BC1代接种进行遗传分析。结果表明:N. strampelli对CY29的抗病性由2对隐性基因独立或重叠作用控制,不受胞质效应的影响,属核遗传;对CY30的抗病性由1对显性基因和1对隐性基因互补控制,属核遗传;对Su-14菌系的抗病性由2对隐性基因累加作用控制,属核遗传。研究结果表明,N. strampelli应做为抗源用于小麦的抗病育种中。
Wheat stripe rust is one of the most common and important diseases occurring on wheat in the world. Planting disease-resistant varieties is the first choice for prevention and treatment of this disease. N. strampelli was imported from Italy in 1974. It is a typical long-lasting stripe rust resistance variety in the long-term stability of wheat stripe rust in Longnan, Gansu. In order to determine their genetic traits, genetic analysis was conducted in N. griseus, Mingxian 169 and their crosses F1, F2 and BC1 with the wheat stripe rust races CY29 and CY30 and the strain Su-14 in greenhouse. The results showed that the resistance of N. strampelli to CY29 was controlled by two independent or overlapping recessive genes and was inherited independently of cytoplasmic effect. The resistance to CY30 consisted of one pair of dominant genes and one Complementary control of recessive genes, is a nuclear inheritance; Su-14 strain of disease resistance by two pairs of recessive gene additive control, is a nuclear inheritance. The results show that N. strampelli should be used as a source of resistance in wheat disease-resistant breeding.