<b>Combining ability for common bacterial blight resistance in snap and dry bean (<i>Phaseolus vulgaris</i> L.)

  • Roberto dos Santos Trindade Empresa Brasileira de Pesquisa Agropecuária
  • Rosana Rodrigues Universidade Estadual do Norte Fluminense Darcy Ribeiro
  • Antonio Teixeira do Amaral Junior Universidade Estadual do Norte Fluminense Darcy Ribeiro
  • Leandro Simões Azeredo Gonçalves Universidade Estadual do Norte Fluminense
  • José Marcelo Soriano Viana Universidade Federal de Viçosa
  • Claudia Pombo Sudré Universidade Estadual do Norte Fluminense Darcy Ribeiro

Resumo

Common bacterial blight (CBB), which is caused by Xanthomonas axonopodis pv. phaseoli (Xap), is the main bacterial disease in snap beans and controlling this disease using resistant cultivars is still a challenge. This work aimed to study the combining ability for CBB resistance in Phaseolus vulgaris genotypes. Six parents (two genotypes of CBB-resistant dry bean and four susceptible snap bean accessions) were crossed in a complete diallel scheme without reciprocals to estimate the general and specific ability to Xap resistance. CBB resistance was evaluated by the inoculation with two Xap isolates, and its severity was evaluated based on the four following resistance components: area under the disease progress curve; scores in the leaves; latent period and diameter of pod lesion. Differences between the two isolates were observed considering all the disease components. Besides pathogen variability, significant GCA and SCA indicate that additive and non-additive effects are involved in Xap-resistance control for the evaluated genotypes, implying that CBC resistance is a trait with complex inheritance. For breeding purposes, the result demonstrates the need to apply breeding methods that are focused on advanced generations selection.

 

 

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Publicado
2014-11-25
Como Citar
Trindade, R. dos S., Rodrigues, R., Amaral Junior, A. T. do, Gonçalves, L. S. A., Viana, J. M. S., & Sudré, C. P. (2014). <b>Combining ability for common bacterial blight resistance in snap and dry bean (<i>Phaseolus vulgaris</i&gt; L.). Acta Scientiarum. Agronomy, 37(1), 37-43. https://doi.org/10.4025/actasciagron.v37i1.16505
Seção
Genética e Melhoramento

 

2.0
2019CiteScore
 
 
60th percentile
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2.0
2019CiteScore
 
 
60th percentile
Powered by  Scopus