Registration of Four Sunflower Germplasms With Resistance to <i>Orobanche cumana</i> Race F

Jan, C.C.; Fernández‐Martínez, José M.; Ruso, Juan M.; Muñoz‐Ruz, J.

doi:10.2135/cropsci2002.2217

Cited by 43 publications

(30 citation statements)

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“…Fertility restoration (Seiler, 2000) and cytoplasmic male sterility (Whelan and Dedio, 1980) Helianthus grosseserratus M. Martens Broomrape resistance (Jan et al, 2002) Helianthus hirsutus Raf.…”

Section: Priority Crop Wild Relatives Of Agricultural Cropsmentioning

confidence: 99%

An Inventory of Crop Wild Relatives of the United States

et al. 2013

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The use of crop wild relatives (CWRs) in breeding is likely to continue to intensify as utilization techniques improve and crop adaptation to climate change becomes more pressing. Significant gaps remain in the conservation of these genetic resources. As a first step toward a national strategy for the conservation of CWRs, we present an inventory of taxa occurring in the United States, with suggested prioritization of species based on potential value in crop improvement. We listed 4600 taxa from 985 genera and 194 plant families, including CWRs of potential value via breeding as well as wild species of direct use for food, forage, medicine, herb, ornamental, and/or environmental restoration purposes. United States CWRs are related to a broad range of important food, forage and feed, medicinal, ornamental, and industrial crops. Some potentially valuable species are threatened in the wild, including relatives of sunflower (Helianthus annuus L.), walnut (Juglans regia L.), pepo squash (Cucurbita pepo L.), wild rice (Zizania L.), raspberry (Rubus idaeus L.), and plum (Prunus salicina Lindl.), and few accessions of such taxa are currently conserved ex situ. We prioritize 821 taxa from 69 genera primarily related to major food crops, particularly the approximately 285 native taxa from 30 genera that are most closely related to such crops. Both the urgent collection for ex situ conservation and the management of such taxa in protected areas are warranted, necessitating partnerships between concerned organizations, aligned with regional and global initiatives to conserve and provide access to CWR diversity.

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Section: Priority Crop Wild Relatives Of Agricultural Cropsmentioning

confidence: 99%

An Inventory of Crop Wild Relatives of the United States

et al. 2013

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“…The second strategy, which is widely used for other crops and sunflower, is to double the chromosome set of the F1 plants with hybridization. (Jackson and Murray, 1983)This method has been Jan and Chandler (1989) to recover male fertility in inter-specific hybrid plants and more recently by Jan et al (2002), to recover orobanche resistance in progenies of inter-specific crosses. However, the disadvantage of this method is to return to the diploid state of the crop without aneuploidy in progenies (Jan et al, 2002).…”

Section: Troubles and Limitsmentioning

confidence: 99%

Gene transfer from wildHelianthusto sunflower: topicalities and limits

Breton

Serieys²,

Bervillé³

2010

OCL

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Sunflower (2n=17) belongs to the Helianthus genus (Asteraceae). Wild Helianthus species display morphological variation for branching and stem number, for architecture and seed size, and for resistance to abiotic and biotic stresses due to which they thrive in different environments in North America. The genus is divided into botanical sections, two for annual as sunflower, and two for perennial species as Jerusalem artichoke that produces rhizomes (tubers). We explain the difficulties and successes obtained by crossing sunflower with these species to improve the agronomic traits of the sunflower crop. It is easier to cross the annual species than the perennials' with sunflower. Several traits such as Cytoplasmic male sterility and restorer Rf-PET1 genes, Downy mildew resistance, Phomopsis resistance, Sclerotinia resistance, Rust resistance, and Orobanche resistance have already been introduced from annual species into sunflower crop, but the complex genomic organization of these species compared to sunflower limits their important potential. Perennial species are much more diverse, and their genomes display 2n, 4n, or 6n chromosomes for n 17. The realities of inter-specific hybridization are relatively disappointing due to the introgression lines that have low oil and low seed yield. We report here several attempts to introgress agronomic traits from these species to sunflower, and we present as a case study, an introgressed progenies from H. mollis, a diploid species with sessile small leaves. We constructed a preliminary genetic map with AFLP markers in 21 BC1 plants, and we then showed that some progenies display 6 to 44% of introgression from H. mollis. Although this study is promising due to the novel compact architecture of the progenies, we cannot estimate the transferability from H. mollis to other perennial Helianthus to improve sunflower.

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“…Race F resistance genes from four interspecific amphiploids (Amps) were transferred into a cultivated background with the resistance genes from one source suggesting a digenic model of resistance (Jan et al, 2002;Velasco et al, 2007). Subsequently, a single dominant race G resistance gene was transferred from H. debilis ssp.…”

Section: Introductionmentioning

confidence: 99%

“…However, it took 3 years to obtain resistant BC 1 F 2 and BC 2 F 1 plants for the race G resistance, and even longer for the race F resistance utilizing interspecific Amps that required several cycles of backcrossing to reduce the chromosome numbers from 2n ¼ 68 to 2n ¼ 34, while selecting for resistant progenies (Jan et al, 2002;Velasco et al, 2012). As a general rule, diploid wild Â diploid cultivated crosses produce adequate progenies for selection in BC 1 F 1 , BC 1 F 2 , or BC 2 F 1 , requiring the least amount of time of 2 to 3 years.…”

Section: Introductionmentioning

confidence: 99%

“…tardiflorus, while monitoring resistance in early generations. While utilizing tetraploid Amps, plants with 2n ¼ 34 to 51 chromosomes were observed in the BC 2 F 1 generation, resistant plants with 2n ¼ 34 were selfpollinated, and BC 2 F 2 plants were used to produce seeds for germplasm release (Jan et al, 2002). A resistance gene for race G was identified in H. debilis ssp.…”

Section: Introductionmentioning

confidence: 99%

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Broomrape (Orobanche Cumana Wallr.) Resistance Breeding Utilizing Wild Helianthus Species

Jan

Liu

Seiler

et al. 2014

Helia

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Wild Helianthus species possess valuable resistance genes for sunflower broomrape (Orobanche cumana Wallr.), especially the 39 largely underutilized perennial species. Resistance to race F has been transferred into a cultivated background via bridging of interspecific amphiploids. More recently, a single dominant gene resistant to race G was identified in annual H. debilis ssp. tardiflorus and transferred into cultivated HA 89. Interspecific crosses between wild annual Helianthus species and cultivated lines are relatively easy compared to those involving wild perennial species, which were made easier only after the development of embryo rescue techniques. Interspecific amphiploids resulting from colchicine treatment of F 1 hybrids provide bridging materials for transferring genes without relying on embryo rescue. Among the diploid, tetraploid, and hexaploid perennial species, the speed of gene utilization follows the ploidy level of diploids, tetraploids, and hexaploids due to the time-consuming backcrosses required to eliminate the extra chromosomes in the latter two groups. In the development of pre-breeding materials, the retention rate of genetic material of the wild species is another concern with each additional backcross. For crosses involving tetraploid and hexaploid wild perennials, the use of 2n ¼ 51 chromosome F 1 or BC 1 F 1 generation, as pollen source, could accelerate chromosome reduction to 2n ¼ 34 in BC 1 F 1 or BC 2 F 1 , resulting in useful materials with fewer backcrosses for trait selection.

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Registration of Four Sunflower Germplasms With Resistance to Orobanche cumana Race F

Cited by 43 publications

References 1 publication

An Inventory of Crop Wild Relatives of the United States

An Inventory of Crop Wild Relatives of the United States

Gene transfer from wildHelianthusto sunflower: topicalities and limits

Broomrape (Orobanche Cumana Wallr.) Resistance Breeding Utilizing Wild Helianthus Species

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