First case of evolved herbicide resistance in the holoparasite sunflower broomrape, Wallr.

The development and commercialisation of sunflower varieties tolerant to acetolactate synthase (ALS)-inhibiting herbicides some 20 years ago provided farmers with an alternative method for the cost-effective control of . In 2020, however, two independent sunflower broomrape populations from Drama (GR-DRA) and Orestiada (GR-ORE), Greece, were reported to be heavily infested with after application of the ALS-inhibiting herbicide imazamox. Here we have investigated the race of GR-DRA and GR-ORE and determined the basis of resistance to imazamox in the two Greek samples.

A novel sunflower broomrape race with unusual virulence potentially caused by a mutation.

Introduction: The sunflower broomrape ( Wallr.) gene pools of the Guadalquivir Valley and Cuenca province in Spain had predominantly race-F virulence. A new race G was observed recently in the Guadalquivir Valley potentially due to the genetic recombination of the avirulence genes of both gene pools.

Genetics, Host Range, and Molecular and Pathogenic Characterization of From Sunflower Reveal Two Differentiated Groups in Europe.

Verticillium wilt and leaf mottle of sunflower, caused by the fungus () has become a major constraint to sunflower oil production in temperate European countries. Information about from sunflower is very scarce despite genetics, molecular traits and pathogenic abilities of fungal strains affecting many other crops being widely known. Understanding and characterizing the diversity of populations in those countries where sunflowers are frequent and severely affected by the fungus are essential for efficient breeding for resistance.

Increased Virulence in Sunflower Broomrape (Orobanche cumana Wallr.) Populations from Southern Spain Is Associated with Greater Genetic Diversity.

Orobanche cumana Wallr. (sunflower broomrape) is a holoparasitic weed that infects roots of sunflower in large areas of Europe and Asia. Two distant O.

Strains of Pseudomonas syringae pv. syringae from pea are phylogenetically and pathogenically diverse.

Pseudomonas syringae pv. syringae causes extensive yield losses in the pea crop worldwide, although there is little information on its host specialization and its interactions with pea. A collection of 88 putative P.

Genetic diversity analysis in Vicia species using retrotransposon-based SSAP markers.

Twelve different Ty1-copia and Ty3-gypsy group LTR retrotransposons were compared for their usefulness in SSAP marker development in two agriculturally important Vicia species. Three of the retrotransposons, PDR1, Tps19 and Tvf4, yielded useful SSAP marker systems in V. faba, and V.