Abstract

TALHINHAS, Pedro; NEVES-MARTINS, João  and  OLIVEIRA, Helena. Evaluation of anthracnose resistance in Lupinus spp. germplasm. Rev. de Ciências Agrárias [online]. 2016, vol.39, n.4, pp.550-570. ISSN 0871-018X.  https://doi.org/10.19084/RCA16096.

Anthracnose, caused by the fungus Colletotrichum lupini, is one of the main limitations to the cultivation of several lupin species in different parts of the world. Affecting the main stem, this disease may cause plant death, leading to frequently high yield losses. This disease was reported only recently and the narrow genetic diversity of its pathogen suggests a recent origin for this fungus. On the contrary, the vast genetic richness found in the germplasm of diverse Lupinus species, some of them having the Portuguese territory as important component of their natural distribution areas, call for the study targeting the characterisation of disease resistance in such germplasm accessions. The analysis of a germplasm collection comprising 51 Lupinus albus, 46 L. angustifolius, 19 L. luteus and 10 L. mutabilis accessions using artificial inoculation conditions pointed out L. albus and L. angustifolius accessions with promising levels of resistance, on Portuguese landraces and wild germplasm respectively. Under field conditions, the effect of the disease on yield components affected mostly the number of pods per pod set, suggesting a high flower abortion due to the disease. These results enable a more informed use of the germplasm of these Lupinus species on the respective breeding programmes.

Keywords : lupin; Lupinus; Colletotrichum lupini; Colletotrichum acutatum; anthracnose.

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