Parasitic plants, wild relatives and the nature of resistance

Rubiales, Diego

doi:10.1046/j.1469-8137.2003.00929.x

Cited by 69 publications

(46 citation statements)

References 15 publications

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“…Given such a scenario, the development of Orobancheresistant varieties is a more efficient way for limiting the effects of this parasitic on crops (Rubiales 2003). Orobanche can evolve to overcome host resistance over time.…”

Section: Introductionmentioning

confidence: 99%

Genetic variability of Orobanche aegyptiaca infesting tobacco in Iran by Bayesian analysis

et al. 2014

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Broomrapes (Orobanche L.) are holoparasitic plants, parasitizing roots of a wide range of host plants. In this study, genetic polymorphism among 44 Orobanche aegyptiaca Pers. individuals collected from different regions of northwest Iran was investigated using inter-simple sequence repeat (ISSR) markers. Two hundred-sixty one discernible bands were amplified using 20 ISSR primers which 245 (94%) was polymorphic, indicating considerable genetic variation among the examined individuals. The number of polymorphic bands per primer ranged from 4 to 17, averaging 12.25. UPGMA clustering using Jaccard's similarity coefficients revealed six main groups. Genetic similarity coefficients varied from 0.71 (between individuals 23 and 27) to 0.34 (between 13 and 30). A model-based Bayesian approach subdivided 38 out of 44 broomrape genotypes into 2 genetic groups and the remaining ones were categorized as mixed genotypes based on Q values. According to an analysis of molecular variance, 99% of the total variation was partitioned within genetic groups. The results demonstrated the potential usefulness of ISSR markers for determination of genetic variation in O. aegyptiaca. Understanding the variability in broomrape is important when attempting to develop resistant host crops against this parasite.

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Section: Introductionmentioning

confidence: 99%

Genetic variability of Orobanche aegyptiaca infesting tobacco in Iran by Bayesian analysis

et al. 2014

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“…In the course of evolution, many flowering plants have lost their autotrophic way of life and parasitized other plants in order to feed themselves directly from the host plants (Rubiales, 2003). Such parasitic plants pose a tremendous threat to today's agriculture and provide an intriguing case of pathogenesis between species of relatively close evolutionary ancestry.…”

Section: Host Finding and Orientation: The Key Role Of Strigolactonesmentioning

confidence: 99%

“…At present, there is a strong consensus that resistance to parasitic plant is a multicomponent event, resulting from a battery of host plant defense acting at different levels of the host-parasite interaction Rubiales, 2003;Ejeta, 2007). Where a potential host plant defense is expressed, it can be narrowed to a specific stage in the parasite life cycle.…”

Section: Mechanisms Of Resistancementioning

confidence: 99%

“…Development of genetically-improved varieties with resistance to Striga is often straightforward, given that reliable sources of resistance are available and efficient and easily controlled and practical screening methods to provide sufficient selection pressure exist (Rubiales, 2003). Unfortunately, this has been seldom the case.…”

Section: Conventional Breedingmentioning

confidence: 99%

“…Unfortunately, this has been seldom the case. From the previous sections, it can be admitted that resistance against Striga is difficult to develop due to the complex nature of the parasites, scarcity of donor sources reported so far, and in some cases due to varying heritability (moderate to low) because of the numerous environmental effects and genetic variability of parasite populations (Rubiales, 2003;Aly, 2012). In spite of all these difficulties, significant success has been achieved.…”

Section: Conventional Breedingmentioning

confidence: 99%

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