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Response to anthracnose in a tarwi (Lupinus muyabilis) collection is influenced by anthocyanin pigmentation
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Orientador(es)
Resumo(s)
Anthracnose, caused by Colletotrichum lupini, is a major limiting factor for lupin production.
Tarwi or Andean Lupin (Lupinus mutabilis) is generally regarded as susceptible to anthracnose, but the
high protein and oil content of its seeds raise interest in promoting its cultivation in Europe. In this
study we evaluated the response to anthracnose of 10 tarwi accessions contrasting in anthocyanin
pigmentation, by comparison to white lupin (Lupinus albus), using a contemporary Portuguese fungal
isolate. A severity rating scale was optimized, including weighted parameters considering the type
of symptoms and organs a ected. All tarwi accessions were classified as susceptible, exhibiting
sporulating necroses on the main stem from seven days after inoculation. Anthracnose severity was
lower on anthocyanin-rich tarwi plants, with accession LM34 standing out as the less susceptible.
Accession I82 better combines anthracnose response and yield. In global terms, disease severity was
lower on white lupin than on tarwi. Although based on a limited collection, the results of the study
show the existence of genetic variability among L. mutabilis towards anthracnose response relatable
with anthocyanin pigmentation, providing insights for more detailed and thorough characterization
of tarwi resistance to anthracnose
Descrição
Palavras-chave
Lupinus mutabilis Lupinus albus Colletotrichum lupini anthracnose susceptibility anthocyanin pigmentation
Contexto Educativo
Citação
Plants 2020, 9, 583
Editora
MDPI