BSA-seq mapping reveals major QTL for broomrape resistance in four sunflower lines

Imerovski, Ivana; Dedić, Boško; Cvejić, Sandra; Miladinović, Dragana; Jocić, Siniša; Owens, Gregory L.; Tubić, Nataša Kočiš

doi:10.1007/s11032-019-0948-9

Cited by 40 publications

(48 citation statements)

References 56 publications

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“…As a result, resistance genes to new races of O. cumana were recently detected in inbred lines originating from crosses with H. deserticola (Hladni et al, 2012), H. tuberosus and H. divaricatus (Cvejić et al, 2014). The resistance genes from these sources have been subsequently mapped, and the developed molecular markers will expedite their transfer into commercial lines (Imerovski et al, 2013(Imerovski et al, , 2016(Imerovski et al, , 2019. Interestingly, Orobanche cumana is not found in the centre of sunflower origin, but CWR have proven to be a useful source of resistance genes to this parasite which hampers sunflower production across Europe.…”

Section: Use Of Cultivated Sunflower and Cwr Resources In Breedingmentioning

confidence: 99%

Gene banks for wild and cultivated sunflower genetic resources

Terzić¹,

Boniface

Marek³

et al. 2020

OCL

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Modern breeding of sunflower (Helianthus annuus L.), which started 100 years ago, increased the number and the diversity of cultivated forms. In addition, for more than 50 years, wild sunflower and other Helianthus species have been collected in North America where they all originated. Collections of both cultivated and wild forms are maintained in gene banks in many countries where sunflower is an important crop, with some specificity according to the availability of germplasm and to local research and breeding programmes. Cultivated material includes land races, open pollinated varieties, synthetics and inbred lines. The majority of wild accessions are ecotypes of wild Helianthus annuus, but also 52 other species of Helianthus and a few related genera. The activities of three gene banks, in USA, France and Serbia, are described in detail, supplemented by data from seven other countries. Past and future uses of the genetic resources for environmental adaptation and breeding are discussed in relation to genomic and improved phenotypic knowledge of the cultivated and wild accessions available in the gene banks.

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Section: Use Of Cultivated Sunflower and Cwr Resources In Breedingmentioning

confidence: 99%

Gene banks for wild and cultivated sunflower genetic resources

Terzić¹,

Boniface

Marek³

et al. 2020

OCL

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“…In addition to the studies on qualitative resistance, recent genetic and molecular studies have revealed a more complex control of broomrape resistance in sunflower. The race-specific resistance to O. cumana have been reported for quantitative loci [65,68,72,74] (Table 1). Using different mapping populations, authors have mapped a QTL-controlling resistance to broomrape in different genetic regions.…”

Section: Resistance Genes and Resistant Sunflower Genotypesmentioning

confidence: 99%

“…While Or 5 gene resides in the upper terminus of chromosome 3 with the closest public marker ORS1036 being 7.5 cM downstream, or ab-vl-8 is mapped in the lower region of chromosome 3. Later on, Imerovski et al [74] mapped two major QTL on chromosome 3, designated QTL or3.1 and QTL or3.2. QTL or3.1 was positioned in a genomic region where the previous broomrape resistance gene Or 5 had been mapped, while QTL or3.2 was identified for the first time in the lower region of the same chromosome.…”

Section: Molecular Markers For Identification Of Major and Minor Genementioning

confidence: 99%

“…Analyzing three different crosses, Imerovski et al [74] exploited the regions on chromosome 3 in the intervals where QTL peaks were found to be significant. The author identified 123 genes in the region of major QTL or3.1, between 31.9 and 38.48 Mb.…”

Section: Association Of Identified Qtl With Resistance Genes and Funcmentioning

confidence: 99%

“…Considering that the region surrounding QTL or3.1 had previously been identified as carrying gene Or 5 conferring complete resistance to race E and partial resistance to race F [65,86], the authors hypothesized that region QTL or3.1 could in fact be Or 5 gene. Since Imerovski et al [74] exploited resistance genes/QTL conferring resistance to race G, it may happen that Or 5 now acts as the so called "defeated R gene", which expresses moderate resistance to races higher than race E. This effect is observed in other crops as well [91,92] in which genes conferring complete resistance toward a race/strain of pathogen, express partial resistance toward a more aggressive strain/race of the same pathogen.…”

Section: Association Of Identified Qtl With Resistance Genes and Funcmentioning

confidence: 99%

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Genetic and Genomic Tools in Sunflower Breeding for Broomrape Resistance

Cvejić

Radanović

Dedić

et al. 2020

Genes

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Broomrape is a root parasitic plant causing yield losses in sunflower production. Since sunflower is an important oil crop, the development of broomrape-resistant hybrids is the prime breeding objective. Using conventional plant breeding methods, breeders have identified resistant genes and developed a number of hybrids resistant to broomrape, adapted to different growing regions worldwide. However, the spread of broomrape into new countries and the development of new and more virulent races have been noted intensively. Recent advances in sunflower genomics provide additional tools for plant breeders to improve resistance and find durable solutions for broomrape spread and virulence. This review describes the structure and distribution of new, virulent physiological broomrape races, sources of resistance for introduction into susceptible cultivated sunflower, qualitative and quantitative resistance genes along with gene pyramiding and marker assisted selection (MAS) strategies applied in the process of increasing sunflower resistance. In addition, it presents an overview of underutilized biotechnological tools, such as phenotyping, -omics, and genome editing techniques, which need to be introduced in the study of sunflower resistance to broomrape in order to achieve durable resistance.

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