Data/hora: 17/06/2024 09:36:54

Biblioteca(s): | Embrapa Soja.
Data corrente: | 28/04/1993
Data da última atualização: | 10/11/2008
Autoria: | BERNARD, R. L.
Título: | Breeding soybeans for resistance to foliar diseases.
Ano de publicação: | 1989
Fonte/Imprenta: | In: CONFERENCIA MUNDIAL DE INVESTIGACION EN SOJA, 4., 1989, Buenos Aires. Actas... Buenos Aires: AASOJA, 1989.
Volume: | t.3
Páginas: | p.1138-1143.
Idioma: | Inglês
Conteúdo: | Foliar diseases are of very common occurrence on soybeans but many are of little economic impact. Worldwide, soybean rust (Phakopsora pachyrhizi) is probably the  most damaging. Many rust resistant soybean lines have been reported but none is resistant to all races and the breeder must continue to search for resistance, and also to combine the resistance already found into the same soybean. In the U.S. where rust does not occur the leaf diseases with the most economic impact are brown spot (Septoria glycines) in the North and anthracnose (Colletotrichum dematium or Glomerella glycines) and Cercospora leaf spot (Cercospora Kikuchii) in the South. No clear-cut resistance has been found for these diseases and the breeder must content himself with selecting against high susceptibility. Much of the economic loss can be eliminated by avoiding super-susceptible cultivars. There are many other leaf diseases caused by bacteria of fungi which cause only occasional of slight economic losses. Although little breeding effort is being expended on them, for many of them, for many them clear-cut, simply inherited resistance is available. Because of their widespread occurrence even a very slight yield reduction can have economic impact and therefore these diseases merit more emphasis in future breeding programs.
Palavras-Chave: | Bacterial disease; Disease; EUA; Fungal; Resistance; Soybean; USA; Yield losses.
Thesagro: | Doença; Melhoramento; Phakopsora Pachyrhizi; Resistência; Soja.
Thesaurus Nal: | breeding.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)