Mapping of genes associated to Asian soybean rust (Phakopsora pachyrhizi) / Mapeamento de genes associados à resistência da soja a ferrugem asiática (Phakopsora pachyrhizi)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The costs due to Asian soybean rust, which consists of fungicides, operational application costs and reduction in paid taxes, represent severe losses for worldwide soybean production. Thus, Asian soybean rust represents one of the most challenging problems for agricultural research in the future, since chemical control of the disease is the obligated alternative while resistant cultivars are unavailable. However, fungicide application significantly increases production costs. In Brazil, it is estimated that the costs of two applications are of approximately US$ 40,00.ha-1, aside the operational costs incurred due to machinery and fuel, that is, the figure represents solely fungicide costs. Taking into account the previous considerations, the present work aims to evaluate two sources of resistance to Asian soybean rust (PI 200487 and PI 459025A), and to verify if the genes involved in pathogen-responses have already been described in previous work, by identifying their respective linkage groups. Bulked segregant analysis was used to map the genes of interest. The results allowed the following conclusions: a) BSA was effective to detect loci associated to Asian soybean rust resistance; b) PI 459025A (Bing Nam) carries the resistance gene Rpp4 mapped to the linkage group G and c) PI 200487 (Kinoshita) has a novel resistance gene mapped to the linkage group N. The identified gene is denominated Rpp5.

ASSUNTO(S)

ferrugem - doença de planta genes mapeamento genético ssr markers. asian soybean rust disease resistance genetic resistance glycine max genetic mapping soja. resistência genética vegetal phakopsora pachyrhizi

ACESSO AO ARTIGO

Documentos Relacionados