Plants disease resistance controlled by the resistance gene (r gene) is a resistance with high specificity at the cultivar to race level.

植物中抗病基因所决定的抗病性是一种高水平的品种对病原菌小种的专化抗性。

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So crop breeders must race to develop varieties with the right R genes before new disease strains render existing varieties useless.

因而农作物培育者需要赶在新型疾病使现有品种失去价值之前，开发具有正确的R基因的品种。

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So crop breeders must race to develop varieties with the right R genes before new disease strains render existing varieties useless.

因而农作物培育者需要赶在新型疾病使现有品种失去价值之前，开发具有正确的R基因的品种。

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