Orobanche resistance in sunflower

Honiges, Ana; Wegmann, K.; Ardelean, Aurel

doi:10.2298/hel0849001h

Cited by 16 publications

(8 citation statements)

References 21 publications

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“…Initial studies by Vrânceanu et al . (), further confirmed by other authors (Ish‐Shalom‐Gordon et al ., ; Sukno et al ., ; Tang et al ., ; Pérez‐Vich et al ., ), demonstrated that genetic resistance of sunflower to races A to E of the parasitic weed O. cumana is monogenic dominant, controlled by resistance genes Or1 to Or5 respectively, which points to a gene‐for‐gene relationship between sunflower and its parasite (Höniges et al ., ). The present research illustrated that O. cumana race E avirulence and race F virulence on sunflower genotypes carrying the dominant resistance gene Or5 are allelic and determined by a single gene named Avr Or5 , with race E avirulence allele being dominant over race F virulence allele, as described for other avirulence genes (Agrios, ; Sharma, ).…”

Section: Discussionmentioning

confidence: 97%

A dominant avirulence gene in Orobanche cumana triggers Or5 resistance in sunflower

Rodríguez-Ojeda¹,

Pineda-Martos

Alonso³

et al. 2013

Weed Research

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Summary Orobanche cumana is a weed that grows as a root parasite on sunflower. In general, the O. cumana–sunflower parasitic system is regarded to follow the gene‐for‐gene model, although this has never been demonstrated at the genetic level in O. cumana. The Or5 dominant gene in sunflower confers resistance to O. cumana race E, but not to race F. The objective of this research was to study the inheritance of avirulence/virulence in crosses between plants of O. cumana lines classified as races E and F. Four race E and three race F lines were developed, from which four race E × race F cross‐combinations were made, in three cases including reciprocals. In all cases, F1 seeds did not have the ability to parasitise sunflower line P‐1380 carrying the Or5 gene, indicating dominance of race E avirulence allele(s). Five F2 populations comprising a total of 387 F2:3 families were evaluated on sunflower line P‐1380. In all cases, one‐fourth of the F2:3 families did not possess the ability to parasitise P‐1380 plants, suggesting that race E avirulence and race F virulence on P‐1380 are allelic and controlled by a single locus. This study demonstrated the gene‐for‐gene interaction in the O. cumana–sunflower parasite system and provided useful information to identify genes involved in O. cumana virulence. The approach followed in this research can contribute to define precisely races of the parasite on the basis of the presence of avirulence genes.

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Section: Discussionmentioning

confidence: 97%

A dominant avirulence gene in Orobanche cumana triggers Or5 resistance in sunflower

Rodríguez-Ojeda¹,

Pineda-Martos

Alonso³

et al. 2013

Weed Research

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“…Broomrape, while not a disease, is a parasitic weed that infects sunflower roots, causing severe losses in drier climates in southern Europe and the Black Sea region, Australia, Mongolia, and China (Höniges et al, 2008). Five resistance genes ( Or 1 – Or 5 ) have been used successfully for broomrape control following the progression of races A through E. Since broomrape is a highly variable parasite, similar to infesting pathogens, the breakdown of resistance is a frequent phenomenon, and multiple sources of resistance are needed.…”

Section: Biotic Traitsmentioning

confidence: 99%

Utilization of Sunflower Crop Wild Relatives for Cultivated Sunflower Improvement

2017

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Sunflower (Helianthus annuus L.) is one of the few crops native to the United States. The current USDA–ARS National Plant Germplasm System (NPGS) crop wild relatives sunflower collection is the largest extant collection in the world, containing 2519 accessions comprising 53 species—39 perennial and 14 annual. To fully utilize gene bank collections, however, researchers need more detailed information about the amount and distribution of genetic diversity present within the collection. The wild species are adapted to a wide range of habitats and possess considerable variability for most biotic and abiotic traits. This represents a substantial amount of genetic diversity available for many agronomic traits for cultivated sunflower, which has a very narrow genetic base. Sunflower ranked fifth highest among 13 crops of major importance to global food security surveyed from the mid‐1980s to 2005 in the use of traits from crop wild relatives. The estimated annual economic contribution of the wild species for cultivated sunflower is between US$267 to 384 million. Most of the value is derived from the PET1 cytoplasm from wild H. petiolaris, disease resistance genes, abiotic salt tolerance, and resistance to imidazolinone and sulfonylurea herbicides. Crop wild relatives provide a wide range of valuable attributes for traditional and molecular breeding, as well as for ecological experimentation, and have enabled rapid advances in ecological and evolutionary genetics. The wild species of Helianthus continue to contribute specific traits to combat emerging pests and environmental challenges and, at the same time, are preserved for future generations.

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“…Resistance mechanisms can operate at the pre‐attachment, pre‐haustorial, or post‐haustorial stage of Orobanche –host plant interactions (Pérez de Luque et al., 2009). At the pre‐attachment stage, the most common resistance mechanisms involve low‐level secretions of germination stimulants, germination inhibitors, and inhibitors of radicle development (Höniges, Wegmann, & Ardelean, 2008). Resistant sunflower germplasm that exhibit low‐level secretions of germination stimulants (Labrousse, Arnaud, Serieys, Bervillé, & Thalouan, 2001) or of 7‐hydroxylated simple coumarins have been reported (Serghini, Pérez‐de‐Luque, Castejón‐Muñoz, García‐Torres, & Jorrín, 2001).…”

Section: Introductionmentioning

confidence: 99%

Characterization of post‐haustorial resistance to sunflower broomrape

Martín-Sanz¹,

Pérez‐Vich

Rueda³

et al. 2020

Crop Science

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The development of durable resistance to broomrape (Orobanche cumana Wallr.) in sunflower (Helianthus annuus L.) requires detailed characterization of the genetic and physiological bases of resistance. The objective of the present study was to map the resistance gene accurately, and to characterize the mechanism of resistance to broomrape observed in a sunflower inbred line (PHSC1102). PHSC1102, which was consistently resistant against race F and race G populations of broomrape, was crossed with PHSC1201, which was susceptible to races F and G. A mapping population of 150 F 2 genotypes was phenotyped by evaluating F 2:3 families for resistance to broomrape races F GV and G TK . The use of single nucleotide polymorphism (SNP) markers mapped the Or SII gene to Linkage Group 4 (LG4) of the sunflower genome. Minirhizotron and histological studies of the resistant line revealed that the attachment of broomrape to host roots was similar in both the resistant and susceptible lines and that the resistance was observed at a late stage (i.e., after tubercle development). Interestingly, the resistance of the PHSC1102 line was associated with the production of phenolic compounds, which were hypothesized to restrict the parasite's growth. This research provides novel and valuable information about the host-parasite interactions between sunflower and broomrape.Abbreviations: DAB, 3,3-diaminobenzidine; LG, linkage group; LOD, logarithm of odds; PBS, phosphate-buffered saline; PCR, polymerase chain reaction; QTL, quantitative trait loci; SNP, single nucleotide polymorphism; TBO, toluidine blue O.

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Orobanche resistance in sunflower

Cited by 16 publications

References 21 publications

A dominant avirulence gene in Orobanche cumana triggers Or5 resistance in sunflower

A dominant avirulence gene in Orobanche cumana triggers Or5 resistance in sunflower

Utilization of Sunflower Crop Wild Relatives for Cultivated Sunflower Improvement

Characterization of post‐haustorial resistance to sunflower broomrape

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