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本项试验反应了解放以来我国小麦品种抗条锈性变异的过程。变异情况有:<1>抗条锈性丧失较快:一般3～5年即丧失了抗性,如碧蚂1号、阿勃、丰产3号等;<2>抗条锈性丧失较慢:保持抗性10年以上,如繁6、阿夫等;<3>抗条锈性“失而复得”又“得而复失”:如南大2419;<4>抗条锈性不稳定:如平原50。变异特点为:易变区及其毗邻地区较早发生变异并自西向东发展,华北麦区要比西北、西南晚3年左右。小种的改变是历次抗条锈性变异的主要原因。小麦品种的大规模更替对条锈菌生理小种类型组成有巨大影响。大区间品种布局不同能导致小种分布的区域性差异。
This test reflects the process of resistance to stripe rust in wheat cultivars since liberation. Variation: <1> stripe rust resistance loss: generally 3 to 5 years that the loss of resistance, such as Bi Ma 1, Abercrombie and Fitch, Abundance 3, etc.; : To maintain resistance for more than 10 years, such as Fan 6, Afo, etc .; <3> Stripe rust “lost again” and “too late”: such as Nanda 2419; <4> Stripe Rust instability: 50. The variation features are as follows: the mutants and their adjacent areas mutated earlier and developed from west to east, and the north China wheat area was about 3 years later than the northwest and southwest. The change of race is the main reason for the variation of resistance to stripe rust. The large-scale replacement of wheat cultivars has a huge impact on the genus of stripe rust species. Regional differences in the distribution of races can lead to different regional distribution of races.