Bidirectional backcrosses between wild and cultivated lettuce identify loci involved in nonhost resistance to downy mildew.

ABSTRACT:

Key message

The nonhost resistance of wild lettuce to lettuce downy mildew seems explained by four components of a putative set of epistatic genes. The commonplace observation that plants are immune to most potential pathogens is known as nonhost resistance (NHR). The genetic basis of NHR is poorly understood. Inheritance studies of NHR require crosses of nonhost species with a host, but these crosses are usually unsuccessful. The plant-pathosystem of lettuce and downy mildew, Bremia lactucae, provides a rare opportunity to study the inheritance of NHR, because the nonhost wild lettuce species Lactuca saligna is sufficiently cross-compatible with the cultivated host Lactuca sativa. Our previous studies on NHR in one L. saligna accession led to the hypothesis that multi-locus epista

SUBMITTER: Giesbers AKJ 

PROVIDER: S-EPMC6061147 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature