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本文评述了1969到1985年澳大利亚小麦秆锈病的致病性变化,单个致病性的频率受主要小麦品种的抗性基因型影响。1969到1978年,致病型构成及其变化在澳大利亚4个小麦种植区之间是不相同的。1978到1985年,所有区域的优势致病型都是343—1,2,3,5,6。据悉,该致病型是由分布在广阔而又不相连地区中的致病型326—1,2,3,5,6演化而来.而且认为这些情况对它的持续传播有利。另一重大事件是小麦秆锈病菌在黑麦上产生了专化性。侵染感病品种Coorong的致病型34—2,12是从致病型34—2发展来的,很可能是1979年。1984年检出了侵染品种Satu的另一个致病型(被定为34—2,12,13)。因黑麦和小麦不同抗性基因的布局使得小麦秆锈菌内部分化出适应每种作物、种类不同的群体。
This paper reviews the pathogenic changes of wheat stem rust from 1969 to 1985 in Australia. The frequency of individual pathogenicity is influenced by the resistant genotypes of the major wheat cultivars. From 1969 to 1978, the constitution of the pathotypes and their changes were different among the four wheat growing areas in Australia. From 1978 to 1985, the predominant pathogenicity in all regions was 343-1, 2, 3, 5, 6. It is reported that the pathogenic type is distributed in a vast but not connected areas in the pathogenic type 326-1,2,3,5,6 evolved. And they consider that these conditions are good for its continued dissemination. Another major event is that wheat straw rust has produced specialization on rye. The pathotype 34-2,12 infecting the susceptible variety Coorong evolved from the pathotype 34-2, most likely in 1979. In 1984, another virulent strain of Satu (identified as 34-2, 12, 13) was detected. Due to the layout of different resistance genes of rye and wheat, wheat stalk rust is internally differentiated to adapt to different crops and different species groups.