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本试验用16个被认为可能具有水平抗性的小麦品种为基础材料,采用乙烯利化学杀雄或太谷核不育为手段进行随机多交,以相对抗病性综合指数(RRCI)表示抗病性强度,研究了小麦条锈病水平抗性的遗传力及人工选择下的遗传进度,结果指出:1)随机多交的后代系统中,出现了一些抗条锈性显著高于优良亲本的系统。2)抗条锈性的遗传力较高:化杀多交为80.45%,雄不育多交为75.30%。3)经一代选择,群体的抗条锈性获得了一定的遗传进度:化杀多交为8.93%,雄不育多交为6.47%。4)化杀多交的后代中出现了少数抗条锈性、小区产量、千粒重三者或其中两者皆高于优亲对照的系统。因此应用随机多交方法累积微效抗病基因,培育水平抗性的小麦品种将是可行的。
In this study, 16 wheat cultivars, which may be considered to be resistant to horizontal stress, were used as the basic materials. Etherification or Taigu nuclear infertility were used as random crosses. The relative resistance index (RRCI) The results showed that: 1) there were some systems with more resistance to stripe rust than the elite parent in randomized offspring system . 2) The heritability of stripe rust resistance is higher: kill more to pay for 80.45%, male infertility pay more for 75.30%. 3) After a generation of selection, the stripe rust resistance of the population obtained a certain genetic progress: killing more to pay 8.93%, more male to pay 6.47%. 4) There were a few anti-stripe rust resistance, cell yield, 1000-grain weight, or both of which were higher than that of the superior-progeny control in offspring of multiple killings. Therefore, it is feasible to use the randomized multiple crosses to accumulate minor resistance genes and cultivate the level-resistant wheat varieties.