Reação de genótipos de soja do programa de melhoramento da Universidade Federal de Uberlândia ao fitonematóide Heterodera glycines raça 3
Reaction of soybean genotypes from Universidade Federal de Uberlândia?s breeding program to the plant nematode Heterodera glycines race 3
Soybean (Glycine max (L) Merril) is an ancient plant, and its origin and history are hardto establish. The occurrence of diseases in this culture is one of the major limitingfactors to high yields. Resistant soybean cultivars are the most effective tool availablefor soybean cyst nematode management. This study evaluated the reaction of soybeangenotypes from UFU?s breeding program to the plant nematode Heterodera glycinesrace 3. The trials were done in a greenhouse of the Instituto de Ciências Agrárias daUniversidade Federal de Uberlândia. The experimental design was completelyrandomized with 25 treatments (twenty four soybean genotypes from UFU and thecultivar MG/BR 46 ?Conquista?, as a control) with eight repetitions. The genotypeswere seeded on Styrofoam trays, with one seed per cell; subsequently, the seedlingswere transplanted to 1-L clay pots containing a mixture of sand and soil (2:1),previously fumigated with methyl bromide. The trail was done with one plant per pot,inoculated with 4000 nematode eggs. The evaluation was done 35 days after theinoculation. The root system was gently washed to remove the females, and the soil wasprocessed for female and cyst extraction. Among the 24 genotypes evaluated, UFU 502was moderately susceptible to Heterodera glycines race 3 while UFU 510, UFU 504and UFU 512 were highly susceptible to the soybean cyst nematode. All other lineswere susceptible.
Advisor:Césio Humberto de Brito; Clélia Aparecida Iunes Lapera; Osvaldo Toshiyuki Hamawaki; Maria Amelia dos Santos
School:Universidade Federal de Uberlândia
Source Type:Master's Thesis
Date of Publication:02/26/2007