Quantitative trait locus (QTL) mapping is a highly effective approach for studying genetically complex forms of plant disease resistance. With QTL mapping, the roles of specific resistance loci can be described, race-specificity of partial resistance genes can be assessed, and interactions between resistance genes, plant development, and the environment can be analyzed. Outstanding examples include: quantitative resistance to the rice blast fungus, late blight of potato, gray leaf spot of maize, bacterial wilt of tomato, and the soybean cyst nematode. These studies provide insights into the number of quantitative resistance loci involved in complex disease resistance, epistatic and environmental interactions, race-specificity of partial resistance loci, interactions between pathogen biology, plant development and biochemistry, and the relationship between qualitative and quantitative loci. QTL mapping also provides a framework for marker-assisted selection of complex disease resistance characters and the positional cloning of partial resistance genes.

中文翻译：

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植物的QTL定位和定量抗病性。

数量性状基因座（QTL）作图法是研究遗传复杂形式的植物抗病性的高效方法。通过QTL定位，可以描述特定抗性基因座的作用，可以评估部分抗性基因的种族特异性，并可以分析抗性基因，植物发育和环境之间的相互作用。突出的例子包括：对稻瘟病菌的定量抗性，马铃薯的晚疫病，玉米的灰叶斑病，番茄的细菌枯萎病和大豆孢囊线虫。这些研究提供了有关复杂疾病抗性，上位性和环境相互作用，部分抗性基因座的种族特异性，病原体生物学，植物发育和生物化学之间相互作用的定量抗性基因座数量的见解，以及定性和定量位点之间的关系。QTL作图还提供了用于标记物辅助选择复杂的抗病性状和部分抗性基因的位置克隆的框架。