SciELO - Scientific Electronic Library Online

 
vol.41 número4Modelo fotossintético para simulação da produtividade do milho em condições de temperatura e CO2 elevadosControle químico da hérnia das crucíferas em rúcula cultivada em campo naturalmente infestado índice de autoresíndice de assuntosPesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Não possue artigos similaresSimilares em SciELO

Compartilhar


Revista de Ciências Agrárias

versão impressa ISSN 0871-018X

Resumo

SANTOS, Jossana Machry et al. Reaction of oat cultivars to blast in search of new sources of genetic resistance. Rev. de Ciências Agrárias [online]. 2018, vol.41, n.4, pp.221-230. ISSN 0871-018X.  https://doi.org/10.19084/RCA18162.

The objective of this work was to evaluate eleven oat (Avena spp.) cultivars for the reaction to the blast caused by the fungus Pyricularia oryzae Cav., under controlled conditions, to identify promising cultivars for use in genetic breeding programs. Five cultivars of Avena sativa, four of A. strigosa and two of A. brevis were tested. The reaction was observed in leaves, with four isolates of P. oryzae, in the concentration of 2 x 105 conidia/ml. It was quantified the number and expansion of lesions, severity and area under the curve of disease progression. The cultivars presented variability regarding the reaction to inoculation. The best performance was A. sativa 'URS Taura', which showed the lowest values for number of lesions (2/leaf), length (5.42 mm) and width (1.25 mm) of lesions, area under the curve of disease progression (0.65) and severity (6%). No genotype was resistant, but four cultivars showed severity percentages compatible with 'Moderately resistance': A. sativa 'URS Taura' (6%), 'UPFA Ouro' (14%) and 'IPR Afrodite' and A. brevis 'BRS Madrugada' (24%). These genotypes are references for use as parents in oat breeding programs.

Palavras-chave : Avena brevis; A. sativa; A. strigosa; Pyricularia oryzae.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons