Studies on sunflower rust. X. Specialization of <i>Puccinia helianthi</i> on wild sunflowers in Texas

Hennessy, C. M. R.; Sackston, W. E.

doi:10.1139/b72-236

Cited by 14 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Resistance genes R 1 and R 2 , which have been widely used in breeding programs, originated from outcrosses with CWR in Texas and are believed to be among the earliest resistance genes to genetically control a sunflower pathogen (Putt and Sackston, 1957, 1963). Hennessy and Sackston (1972) concluded that most species of wild sunflower in Texas were heterogeneous for rust resistance. An extensive survey of >200 populations of two annual species ( H .…”

Section: Biotic Traitsmentioning

confidence: 99%

Utilization of Sunflower Crop Wild Relatives for Cultivated Sunflower Improvement

2017

View full text Add to dashboard Cite

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.

show abstract

Section: Biotic Traitsmentioning

confidence: 99%

Utilization of Sunflower Crop Wild Relatives for Cultivated Sunflower Improvement

2017

View full text Add to dashboard Cite

show abstract

“…Resistance genes R 1 and R 2 , which have been widely used in sunflower breeding programs, originated from outcrosses with wild sunflower in Texas and are believed to be the first resistance genes to control a sunflower pathogen Sackston, 1957, 1963). Hennessy and Sackston (1972) concluded that most species of wild sunflower in Texas were heterogeneous for rust resistance. An extensive survey of over 200 populations of seven species including two annual species, H. annuus and H. petiolaris, and five perennial species, H. maximiliani, H. nuttallii, H. grosseserratus, H. pauciflorus (rigidus) and H. tuberosus from the north central USA was undertaken by Zimmer and Rehder (1976).…”

Section: Rustmentioning

confidence: 99%

Germplasm resources for increasing the genetic diversity of global cultivated sunflower

Seiler

Marek

2011

Helia

View full text Add to dashboard Cite

Genebanks are a rich source of genetic diversity that can be readily exploited for crop improvement. The USDA-ARS established a cultivated sunflower germplasm collection at the National Plant Germplasm System, North Central Regional Plant Introduction Station at Ames, Iowa in1948. A wild Helianthus germplasm collection was established at the USDA-ARS Bushland, Texas station in 1976. Presently, both collections are maintained and managed at Ames, Iowa. The genus Helianthus consists of 52 species and 19 subspecies, with 14 annual and 38 perennial species. Over 30 explorations in the past 35 years have resulted in the assemblage of a wild sunflower collection that is the most complete in the world. Currently, the sunflower collections contain 4087 accessions: 1886 cultivated H. annuus accessions and 2201 wild accessions of which 1359 accessions are annual and 842 are perennial species. This germplasm is an important current and future genetic resource to combat emerging pests and environmental challenges, helping to maintain sunflower as a viable major global oilseed crop and preserve it for future generations.

show abstract

“…However, wild Helianthus species have been a good source of genes for resistance to the causal agents of economically important diseases. A vast reservoir of rust resistance genes is present in wild annuals viz., wild H. annuus, H. argophyllus and H. petiolaris (Hennessy and Sackston, 1972;Zimmer and Rehder, 1976;Thompson et al, 1981;Seiler, 1992) and in the sole perennial, H. hirsutus (Korell et al, 1996). Quresh et al (1993) observed that resistance to all four rust races (1, 2, 3 and 4) could be found in wild H. annuus, H. argophyllus and H. petiolaris.…”

Section: Introductionmentioning

confidence: 99%

Differential reaction of recombinant interspecific inbred lines of sunflower to red Rust incited by Puccinia helianthi

Sujatha¹,

Prabakaran²,

Babu³

et al. 2003

Helia

View full text Add to dashboard Cite

Thirty wild Helianthus species, several interspecific hybrids and 380 recombinant interspecific inbred lines (RIILs) derived from interspecific crosses between the cultivated sunflower and four diploid annuals (wild H. annuus, H. argophyllus, H. petiolaris and H. debilis) and three diploid perennials (H. occidentalis, H. maximiliani and H. divaricatus) were studied for reaction to rust caused by Puccinia helianthi under severe natural epiphytotic condition. The disease incidence ranged from 0 to 100% in the stable interspecific derivatives while none of the wild sunflowers and their F 1 hybrids revealed susceptibility to rust. The disease severity in the RIILs varied between 0 and 40%. The mean disease severity was low in lines derived from diploid annuals (6.0-10.4%) as compared with those derived from diploid perennials (23.1-31.1%). One line (PS 1089) derived from H. argophyllus × cultivated sunflower and two lines (PS 2011 and PS 2032) derived from H. petiolaris × cultivar crosses were found to be immune. Disease severity and disease incidence were correlated with various physiological traits.

show abstract

Studies on sunflower rust. X. Specialization of Puccinia helianthi on wild sunflowers in Texas

Cited by 14 publications

References 0 publications

Utilization of Sunflower Crop Wild Relatives for Cultivated Sunflower Improvement

Utilization of Sunflower Crop Wild Relatives for Cultivated Sunflower Improvement

Germplasm resources for increasing the genetic diversity of global cultivated sunflower

Differential reaction of recombinant interspecific inbred lines of sunflower to red Rust incited by Puccinia helianthi

Contact Info

Product

Resources

About