Host differentiation and variability of Orobanche crenata populations from legume species in Morocco as revealed by cross‐infestation and molecular analysis

BACKGROUND Orobanche crenata represents a major biotic constraint to production of faba bean and lentil in Morocco. While this parasitic plant attacks both of these crops, the extent to which Orobanche biotypes specialise in parasitising specific crops is unknown. To address this question, we studie...

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Bibliographic Details
Published in:Pest management science 2017-08, Vol.73 (8), p.1753-1763
Main Authors: Ennami, Mounia, Briache, Fatima Zahra, Gaboun, Fatima, Abdelwahd, Rabha, Ghaouti, Lamiae, Belqadi, Loubna, Westwood, James, Mentag, Rachid
Format: Article
Language:English
Subjects:
Agricultural practices
Biological Assay
Biotypes
Chemical attack
Crops
cross‐infestations
Differentiation
Divergence
Fabaceae - parasitology
Genetic diversity
Genetic Variation
Host Specificity
Ice
Infestation
Integrated pest management
Legumes
Lens culinaris
Life cycle engineering
Life cycles
Morocco
Orobanche - genetics
Orobanche - physiology
Orobanche crenata
Parasites
Parasitic plants
Pest control
Populations
Species
Vicia faba
Virulence
Weed Control
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Summary:BACKGROUND Orobanche crenata represents a major biotic constraint to production of faba bean and lentil in Morocco. While this parasitic plant attacks both of these crops, the extent to which Orobanche biotypes specialise in parasitising specific crops is unknown. To address this question, we studied O. crenata that grew on different hosts and quantified their host specificity to faba bean and lentil. The virulence of O. crenata populations on each host was investigated through field trials, pot and Petri dishes assays. Genetic diversity of the parasite populations was also assessed through molecular analyses. RESULTS The two legume species showed distinct patterns of specificity. Faba bean was more susceptible to both O. crenata populations, while the specificity for lentil by lentil‐grown O. crenata was evident at the final stage of the parasite life cycle as shown by correspondence factorial analyses. Considerable internal variation (81%) within O. crenata populations parasitising both legume species was observed by molecular analyses, but significant divergence (19%; Ø = 0.189; P = 0.010) among the populations was detected. CONCLUSION These results indicate that O. crenata can adapt to specific host species, which is important knowledge when developing integrated pest management practices for parasitic weed control. © 2017 Society of Chemical Industry
ISSN:1526-498X
1526-4998
DOI:10.1002/ps.4536