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Combining Ability for Resistance to White Mold in a Diallel Cross of Soybean
Pereira, Fernanda Aparecida Castro; Vello, Natal Antonio; Rocha, Gabriela Antônia de Freitas; Nekatschalow, Marcos Custódio.
  • Pereira, Fernanda Aparecida Castro; University of São Paulo. Department of Genetics. Piracicaba. BR
  • Vello, Natal Antonio; University of São Paulo. Department of Genetics. Piracicaba. BR
  • Rocha, Gabriela Antônia de Freitas; University of São Paulo. Department of Genetics. Piracicaba. BR
  • Nekatschalow, Marcos Custódio; University of São Paulo. Department of Genetics. Piracicaba. BR
Braz. arch. biol. technol ; 62: e19170610, 2019. tab
Article in English | LILACS | ID: biblio-1039135
ABSTRACT
Abstract The white mold, caused by Sclerotinia sclerotiorum (Lib.) de Bary, is one of the most important diseases of soybean. The objective of the present work was to evaluate the soybean reaction to the fungus S. sclerotiorum, which causes white mold, in a partial diallel with 50 crosses. The Group I of parents was composed of ten experimental lines with high grain yield and the group II consisted in five genotypes with possible resistance to white mold. Ten plants of each cross in the F4 generation and the parents were evaluated for reaction to fungus infection using the method of inoculation in detached leaves in order to assess the severity of the disease and to later estimate the combining abilities. Estimates of the specific combining ability (SCA) was a significant reaction to S. sclerotiorum, indicating that there is variability for fungus resistance due to non-additive genes action.
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Full text: Available Index: LILACS (Americas) Main subject: Plant Diseases / Ascomycota / Soybeans Type of study: Evaluation studies Language: English Journal: Braz. arch. biol. technol Journal subject: Biology Year: 2019 Type: Article Affiliation country: Brazil Institution/Affiliation country: University of São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Plant Diseases / Ascomycota / Soybeans Type of study: Evaluation studies Language: English Journal: Braz. arch. biol. technol Journal subject: Biology Year: 2019 Type: Article Affiliation country: Brazil Institution/Affiliation country: University of São Paulo/BR