Achievements and prospects of wheat breeding for disease resistance

Bartoš, Pavel; Šíp, V.; Chrpová, J.; Vacke, J.; Stuchlíková, E.; Blazkova, E.; Sarova, J.; Hanzalová, A.

doi:10.17221/6107-cjgpb

Cited by 22 publications

(16 citation statements)

References 35 publications

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“…The immune response on these cultivars could be as a result of hypersensitive responses; resistance often breaks down due to the development of new races of the pathogen. A suitable breeding strategy like the use of inter-specific and remote crosses or even the direct transfer of these resistances through backcrosses could be used to improve the adopted but highly susceptible wheat varieties being grown in Ethiopia (Bartos et al, 2002). On the other hand, the susceptible check, Morocco, displayed the highest disease severities of 60 and 70% with completely susceptible (S) responses during 2013 and 2014 cropping seasons, respectively, indicating that an acceptable epidemic pressure was established over the seasons for field experiments.…”

Section: Final Rust Severitymentioning

confidence: 99%

Evaluation of wheat cultivars for slow rusting resistance to leaf rust (Puccinia trticina Eriks) in Ethiopia

Hei¹

2017

Afr. J. Plant Sci.

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Section: Final Rust Severitymentioning

confidence: 99%

Evaluation of wheat cultivars for slow rusting resistance to leaf rust (Puccinia trticina Eriks) in Ethiopia

Hei¹

2017

Afr. J. Plant Sci.

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“…Šíp et al () reported that the level of resistance to powdery mildew in presently grown Czech wheat cultivars was mostly not satisfactory and, therefore, an increase in the resistance level by breeding using local races becomes highly desirable. Partial or field resistance to such a variable pathogen as powdery mildew is undoubtedly of great importance (Bartoš et al, ) and it was observed in most of the tested Aegilops accessions. The most resistant Aegilops species to all tested diseases over years appeared to be Ae.…”

Section: Resultsmentioning

confidence: 99%

Aegilops conservation and collection evaluation in the Czech Republic

Holubec

Hanzalová

Dumalasová

et al. 2014

J of Sytematics Evolution

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Aegilops distribution was revised on localities in the territory of the Czech Republic and the former Czechoslovakia, based on herbarium data, literature and floristic databases. The only surviving species Ae. cylindrica forms the northern limit of distribution in the Danube basin, other sites are secondary. In situ conservation was proposed for two Czech sites where Aegilops have been naturalized. An ex situ gene bank collection has been maintained in the Gene Bank Prague since 1985. The collection includes 21 species and 1099 accessions. The whole collection was evaluated for breeding-valuable characters: resistance to leaf diseases, cereal aphids, viral diseases, and qualitative parameters. Recently, the collection was retested for the present races of leaf and stem rust including new introductions from Kazakhstan. Six different leaf rust races and five different stem rust races collected from the Czech Republic were applied in the older tests, and three races from each rust species in the recent tests. The highest number of accessions resistant both to wheat leaf rust and wheat stem rust and powdery mildew was found in Ae. speltoides (90%). Different reactions of individual accessions of the tested species to the three different pathotypes of each rust species indicates that several diverse genes for specific resistance are present in the accessions of the tested species.

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“…The trace reaction noted could be associated with hypersensitivity whereby fungal infection signals a defense mechanism leading to cell collapse which restricts further disease spread (Rubiales and Nicks, 2000). An appropriate crop improvement strategy like the use of inter specific and remote crosses or even the direct transfer of these resistance through backcrosses could be adopted to improve the adapted but highly susceptible wheat varieties being grown widely in Kenya (Bartos et al, 2002). The genotypes which displayed resistant to moderately resistant responses are of great importance to achieving effective breeding for durable resistance to stem rust.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of bread wheat for both seedling and adult plant resistance to stem rust

M.¹

2012

Afr. J. Plant Sci.

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Wheat is an important staple food crop in sub-Saharan Africa. However, the current wheat consumption of 900 000 tons in Kenya outweighs the wheat production of 350 000 tons given the high population growth and inflation. The stem rust currently poses the greatest threat to wheat production due to the emergence of the virulent race of the Puccinia graminis f. sp tritici, Ug99 (TTKS) and its variants Ug99 + Sr24 (TTKSK) and Ug99 + Sr36 (TTKST) leading to about 70 to 100% yield losses. This study aimed at evaluating twenty-five wheat genotypes for both field and seedling resistance to stem rust. The genotypes were grown in an alpha lattice design and in two replicates both in the greenhouse and in the field at Kenya Agricultural Research Institute (KARI), Njoro. The seedling stage infection types were scored based on Stakman et al. (1962) scale. At the adult plant stages, the stem rust disease severity was based on modified Cobb's scale. The genotypes showed diverse seedling and adult plant resistance responses. The most resistant entries, KSL-2, KSL-3 and KSL-20 also exhibited the pseudo black chaff (PBC) trait implying they contain the Sr2 gene in their background; the basis of breeding for durable resistance to stem rust in wheat. These lines with high stem rust resistance could be backcrossed to the adapted and high yielding but susceptible Kenyan wheat varieties to avert further wheat yield declines.

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Achievements and prospects of wheat breeding for disease resistance

Cited by 22 publications

References 35 publications

Evaluation of wheat cultivars for slow rusting resistance to leaf rust (Puccinia trticina Eriks) in Ethiopia

Evaluation of wheat cultivars for slow rusting resistance to leaf rust (Puccinia trticina Eriks) in Ethiopia

Aegilops conservation and collection evaluation in the Czech Republic

Evaluation of bread wheat for both seedling and adult plant resistance to stem rust

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