This breeding germplasm will later on be utilized in the already existing breeding program at the Department of Plant Breeding, SLU Alnarp, to aid the development of new Swedish cultivars suitable for organic production. ![]() See HGIC 2214, Irish & Sweet Potato Diseases HGIC 2215, Sweet Potato & Irish Potato Insect Pests and HGIC 2216, Root-Knot Nematodes in the Vegetable Garden. With guidance from the received results hybridizations with the goal to add additional resistance genes to these genotypes will be performed. Diseases include early blight, late blight, common scab, brown rot, soft rot, and root-knot nematodes. infestans also can infect other solanaceous plants, including tomatoes, petunias and hairy nightshade. ![]() tarijense will be examined for the presence of different R genes and QTLs for resistance with the help of molecular markers. (PP1849, Reviewed May 2022) Publication File: PP1849 Late Blight in Potato Late blight is caused by the fungal-like oomycete pathogen Phytophthora infestans. In our project offspring from interspecific crosses between late blight resistant accessions from species like S. The approach to use traditional hybridization techniques combined with marker assisted breeding to achieve adequate pyramiding of resistance genes from different sources to prolong the durability is well in agreement with organic principles. Cultural controls and Washington-registered pesticides are. Today there is a renewed interest to combine multiple resistance genes to develop cultivars with a more durable resistance. Home gardener fact sheets for managing plant problems with IPM or Integrated Pest Management. infestans have so far been found in different potato species. In addition to several QTLs, around fourty different R genes conferring resistance to P. Only a limited amount of the biodiversity has been used. The infection originated from a blossom contaminated with an. Sclerotinia lesion on the inflorescence stalk of a potato plant. Do not confuse with apothecia of Sclerotinia. In opposite to most potato cultivars of today many wild Solanum species are rich sources of resistance genes to P. Immature sclerotia developing on belowground stem. Fredrik Reslow and Trupti Kad both at the Department of Plant Breeding, SLU. This fact sheet is part of the WSU Extension Home. Vavilov Institute of Plant Industry (VIR), St Petersburg, Russia. Common starting method: Seed potatoes (cut pieces of potato or small whole potatoes) are planted in the soil. Project group: Nadezda Zoteyeva, Genetic Department of N. Brownish-reddish rots in a potato tuber caused by late blight, Phytphthora infestans. These quickly enlarge into dark blotches which may be surrounded by a pale green margin. Gray-green, water-soaked spots appear on leaves and stems. Note spores form on the margin of the spot. Late blight of potato is caused by a fungus which also causes disease on tomato, eggplant, and other members of the potato family ( Solanaceae ). Underside of potato leaf with spot caused by late blight, Phytophthora infestans. ![]() Project manager: Ulrika Carlson-Nilsson, Department of Plant Breeding, SLU. Symptoms of late blight on potato, Phytophthora infestans.
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