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在小麦条锈病的常发区,对源于CIMMYT的CI-66和CI-7分别与川麦28杂交的F1、F2和BC1群体进行抗性鉴定,研究其成株期在自然发病条件下的抗性表现及杂交后代的抗感分离情况。结果表明,CI-66由1对显性纯合基因控制;CI-7则由1对显性基因和1对隐性基因的互补作用控制。同时,利用CIMMYT材料成功地选育出两份高抗条锈兼抗白粉病材料99B911和999B946。本文还利用30份CIMMYT小麦材料分析了成株抗性与播期的关系,为筛选稳定抗性小麦新材料提供了依据。
The F1, F2 and BC1 populations of CIMMYT-derived CI-66 and CI-7 hybrids with Chuanmai 28 were identified in the wheat stripe rust-prone areas to study their resistance to natural disease Resistance performance and anti-susceptibility of hybrid offspring. The results showed that CI-66 was controlled by one pair of dominant homozygous genes while CI-7 was controlled by one pair of dominant genes and one pair of recessive genes. At the same time, two high resistance stripe rust resistance and powdery mildew resistant materials 99B911 and 999B946 were successfully bred using CIMMYT material. In addition, 30 CIMMYT wheat cultivars were used to analyze the relationship between plant resistance and sowing date, which provided a basis for screening stable and resistant wheat new materials.