Conservation of powdery mildew resistance genes in three composite cross populations of barley

Smet, G. M. W. de; Scharen, A. L.; Hockett, E. A.

doi:10.1007/bf00022918

Cited by 23 publications

(3 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The value of composite crosses and recurrent selection to conserve and concentrate resistance genes in several host-pathogen systems has been described previously (BARNES et al 1971, DE SMET et al 1985, JACKSON et al 1978, JENKINS et al 1954, JINAHYON and RUSSELL 1969, PARLEVLIET and VAN OMMEREN 1988, REINHOLD et al 1990, SAGHAI MAROOF et al 1983). In this study resistance levels in CC XLI to an isolate of P. hordei with low virulence improved in cycle 3 and that frequency of resistance was maintained over the next few cycles with little or not further increase in the frequency of resistant plants.…”

Section: Discussionmentioning

confidence: 93%

Changes in Frequency of Plants Resistant to Barley Leaf Rust Caused by Puccinia hordei Otth. in a Barley Composite Cross Population

Reinhold

Bjarko²,

Sands

et al. 1993

Plant Breeding

View full text Add to dashboard Cite

The response of barley Composite Cross XLI to selection for resistance to leaf rust was evaluated. Representative samples from eight cycles of recurrent selection were inoculated with an isolate of Pucdnia hordei Otth. in both the seedling and adult plant stage. Disease symptoms were evaluated 14 days after inoculation. The resistance in CC XLI increased with selection in the seedling stage from 15.1 to 20.5 %, and in the adult plant stage from 20.5 to 37.5 %, respectively. The largest gains in resistance were observed in the earlier cycles of recurrent selection. Significant fluctuations in percent resistant plants occurred between the years.

show abstract

Section: Discussionmentioning

confidence: 93%

Changes in Frequency of Plants Resistant to Barley Leaf Rust Caused by Puccinia hordei Otth. in a Barley Composite Cross Population

Reinhold

Bjarko²,

Sands

et al. 1993

Plant Breeding

View full text Add to dashboard Cite

show abstract

“…In addition because of the widely different latitudes in which the trials took place, differences were also encountered in the period during which each individual trial occurred . Nevertheless a clear Smet et al ., 1985) . These observations illustrate the highly dynamic flux between resistance/susceptibility which exists in host/pathogen systems and suggest that material from gene banks which is susceptible should not be discarded as useless, as it can become resistant in the future .…”

Section: Discussionmentioning

confidence: 99%

Variation over time and environments in resistance to Erysiphe graminis hordei in samples from a barley germplasm collection

et al. 1990

View full text Add to dashboard Cite

When germplasm is evaluated over a period of time and a range of environments, there is a danger that the basis of evaluation will change . The extent of such variation in samples from a germplasm collection was assessed using powdery mildew resistance in barley as an example . The changes found are believed to be representative of those commonly encountered by breeders when using samples from collections . Results show that substantial deviations from the original scores can occur . The implications of this variation are discussed .

show abstract

“…In a longer perspective, genetically heterogeneous crop stands can also influence pathogen evolution (Finckh et al 2000), since they reduce the reproduction of simple races, thus favouring complex races (Lannou and Mundt 1996;Lannou and Mundt 1997;Mundt 2002b). In addition, evolutionary processes driven by even higher crop genetic heterogeneity, as in composite cross populations, can conserve (De Smet et al 1985, for barley and powdery mildew-Blumeria graminis f. sp. hordei) or even increase (Goldringer et al 1998, for wheat and leaf rust) disease resistance.…”

Section: Disease and Pest Reductionmentioning

confidence: 99%

Functional agrobiodiversity and agroecosystem services in sustainable wheat production. A review

Costanzo

Bàrberi

2013

Agron. Sustain. Dev.

View full text Add to dashboard Cite

Agrobiodiversity can improve the sustainability of cropping systems in a context of low external inputs and unpredictable climate change. Agrobiodiversity strategies to grow wheat are breeding ad hoc cultivars for organic and low-input systems, wheat-legume intercrops and living mulches, cultivar mixtures, and the use of genetically heterogeneous populations. However, applying those strategies can fail due the lack of a well-focused framework. Therefore, we need a better integration between breeding and management and a clear focus on crop traits related to key agroecosystem services. Here, we review the use of agrobiodiversity in wheat production, focusing on breeding and management. We discuss five agroecosystem services: (1) weed reduction, (2) nitrogen use efficiency, (3) abiotic stress tolerance, (4) disease and pest reduction and (5) yield and yield stability. We categorise agrobiodiversity into functional identity, functional composition, and functional diversity, in order to link crop traits to agroecosystem services. Linking crop traits to agroecosystem services could in turn lead to concrete options for farmers and policy. We discuss the relations between crop identity and crop heterogeneity. We also discuss the partitioning of crop heterogeneity between functional composition and functional diversit

show abstract

Conservation of powdery mildew resistance genes in three composite cross populations of barley

Cited by 23 publications

References 16 publications

Changes in Frequency of Plants Resistant to Barley Leaf Rust Caused by Puccinia hordei Otth. in a Barley Composite Cross Population

Changes in Frequency of Plants Resistant to Barley Leaf Rust Caused by Puccinia hordei Otth. in a Barley Composite Cross Population

Variation over time and environments in resistance to Erysiphe graminis hordei in samples from a barley germplasm collection

Functional agrobiodiversity and agroecosystem services in sustainable wheat production. A review

Contact Info

Product

Resources

About