![]() Segregation of late blight resistance in the BC₃F₂ individuals indicated that the BC₃F₁ plant carried two genes conferring late blight resistance however, minor genes may have been lost in the development of the BC₃F₁ or may not have been detected. Quantitative trait analysis was conducted using the following four methods: simple linear regression, interval mapping, composite interval mapping, and multiple interval mapping. A linkage map was constructed based on 155 BC₁F₁ individuals with 231 AFLP and two morphological markers. This population was evaluated for late blight resistance in the field and with detached leaf tests that were scored with a four-point rating system and the Horsfall-Barratt scale. A BC₁F₁ population of 284 individuals was also derived from L. Bulked segregant analysis was conducted on the most resistant and most susceptible BC₃F₂ plants to identify AFLP markers linked to resistance. BC₃F₃ progeny were evaluated in the field to verify detached leaf test results. hirsutum LA1033 and was screened for late blight resistance using detached leaf tests. We evaluated the inheritance of late blight resistance in LA1033 using traditional methods and quantitative trait analysis. ![]() infestans, and other studies have suggested that this resistance is multigenic. Lycopersicon hirsutum Kunth LA1033 is highly resistant to P. In contrast, multigenic late blight resistance in potato has proven durable over decades of use. Inheritance of Tomato Late Blight Resistance in Lycopersicon hirsutum LA1033Įxtensive efforts to control late blight of tomato and potato, caused by Phytophthora infestans (Mont.) de Bary, through incorporation of single resistance genes have been thwarted by the rapid development of virulent pathogen strains.
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