11/10/2023 0 Comments Disease resistant potatoessolani too, but the genes that underly resistance remain to be identified. Wild potato relatives are a promising source of resistance against A. They have been extensively studied to identify resistance genes against potato pathogens, especially Phytophthora infestans. Petota are a rich source of genetic and phenotypic diversity. Potato was domesticated in the Andes region in South America and wild potato relatives from the Solanum sect. The development of fungicide resistance in Alternaria isolates and increased attention on sustainability (limiting the use of fungicides and fertilizer), combined with a changing climate that is favourable for early blight development, means that there is a need for potato cultivars with innate resistance to the disease. This is not a sustainable solution, especially since fungicide-resistant strains of A. No resistant potato cultivars are available at the moment and the disease is mainly controlled by the application of fungicides. Development of early blight is dependent on plant age and environmental conditions such as higher temperatures, humidity and abiotic stress factors. malmeanum, which is an important step towards the development of a cultivar with natural resistance to early blight.Įarly blight, caused by the necrotrophic fungus Alternaria solani and closely related Alternaria species, is an important disease of potato that can cause major yield losses. Hybrids with high levels of resistance to early blight are present among progeny from S. This is somewhat surprising, as resistance against necrotrophic plant pathogens is usually a quantitative trait or inherited recessively according to the inverse-gene-for-gene model. This cross resulted in triploid progeny in which resistance was inherited dominantly. ![]() tuberosum, despite a differing endosperm balance number. malmeanum was also crossed with diploid S. ![]() tuberosum gave rise to a population in which resistance was inherited quantitatively. Here, we identify two wild potato species, which are both crossable with cultivated potato ( Solanum tuberosum), that show promising resistance against early blight disease. solani is developing resistance against fungicides, and potato cultivars with genetic resistance to early blight are currently not available. The disease is usually controlled with fungicides. ![]() Early blight is a disease of potato that is caused by Alternaria species, notably A.
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