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对抗赤霉病基因库进行四轮抗赤霉病性状表型轮回选择,显著降低了基因库群体的平均单穗发病率,病小穗数和病情指数。C4群体中不育株和可育株的穗发病率,病小穗数和病情指数分别比C0群体下降6.87%和5.99%、23.21%和23.25%、5.04%和1.45%。基因库群体中抗病类型属于R~MR的植株频率逐轮递增。随着轮选世代的递增,不同周期的可育株衍生集团系S3和S4的平均病穗率和病情指数相应下降,抗与中抗级的衍生集团系逐轮增多,它们的鉴定入选率也逐轮提高。从轮回育种的后代中已获得了一批抗性有所突破、产量性状优异的小麦新品系。轮回选择法为抗病高产的小麦育种提供了一条有效的途径。
Four rounds of scramble selection against Fusarium head blight resistance gene bank significantly reduced the average single ear incidence, the number of spikelets and the disease index of the gene pool. The spike incidence, disease spike number and disease index of sterile plants and fertile plants in C4 population decreased by 6.87% and 5.99%, 23.21% and 23.25%, 5.04 % And 1.45%. The frequency of plants belonging to the R ~ MR genotype in the genomic population was increased by each round. With the increment of rotation generations, the average disease panicle index and disease index of S3 and S4 of fertile plants derived from different cycles decreased correspondingly, and the resistance and resistance derived derivative groups increased round by round, and their identification rate Improve by wheel From the offspring of reincarnation, a number of new lines of wheat with breakthrough in yield and excellent yield traits have been obtained. The reincarnation method provides an effective way to resist disease and high yield of wheat breeding.