EFFECT OF COMMON BUNT INFECTION ON AGRONOMIC TRAITS AND RESISTANCE IN WINTER WHEAT LINES

The infection of wheat lines Neepawa (susceptible), and its sib BW553 that is nearly isogenic for the Bt-10 resistance gene by differentially virulent races T1 and T27 of common bunt (Tilletia tritici), was followed for 21 days following seeding (dfs) using fluorescence and confocal microscopy. Spore germination was nonsynchronous and all spore stages including germination were observed 5 to 21 dfs. Initial host perception of pathogen invasion, based on autofluorescence in epidermal cells adjacent to the appressoria, was similar in both compatible and incompatible interactions, and occurred as early as 5 to 6 dfs. The total number of sites on a 1-cm segment of coleoptile adjacent to the seed that exhibited autofluorescence was similar in both the compatible and incompatible interactions and rose to a maximum of 35 to 40 per 1 cm length of coleoptile following 17 dfs, although new infection events were observed as late as 21 dfs. In the compatible interaction, the autofluorescence became more diffuse 10 to 12 dfs, emanating in all directions in association with fungal spread. In the incompatible interaction, autofluorescence remained restricted to a small area surrounding the penetration site. Two different reaction zones that extended further in tissues surrounding the penetration point in the incompatible interaction compared with the compatible interaction were identified. The accumulation of callose around invading fungal hyphae was observed during both the compatible and incompatible interactions from 8 to 21 dfs. While callose accumulation was more extensive and widespread in the incompatible interaction, it was clearly present in compatible interactions, particularly in treatments involving BW553. These results were confirmed by expression of callose synthase transcripts that were more abundant in BW553 than in Neepawa and were upregulated during pathogen infection in both compatible and incompatible interactions.

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Genetic architecture of common bunt resistance in winter wheat using genome-wide association study

BMC Plant Biology ◽

10.1186/s12870-018-1435-x ◽

2018 ◽

Vol 18 (1) ◽

Cited By ~ 10

Author(s):

Amira M. I. Mourad ◽

Ahmed Sallam ◽

Vikas Belamkar ◽

Ezzat Mahdy ◽

Bahy Bakheit ◽

...

Keyword(s):

Winter Wheat ◽

Association Study ◽

Genetic Architecture ◽

Genome Wide Association Study ◽

Genome Wide Association ◽

Common Bunt ◽

Genome Wide ◽

Bunt Resistance

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Immunological characteristics of winter wheat varieties to the main pathogens in the right-bank Forest Steppe

Faktori eksperimental'noi evolucii organizmiv ◽

10.7124/feeo.v29.1410 ◽

2021 ◽

Vol 29 ◽

pp. 74-81

Author(s):

L. Golosna ◽

O. G. Afanasieva ◽

O.V. Shevchuk ◽

L.O. Kucherova ◽

I.S. Shvets ◽

...

Keyword(s):

Powdery Mildew ◽

Winter Wheat ◽

Root Rot ◽

Tan Spot ◽

High Plasticity ◽

Common Bunt ◽

Sources Of Resistance ◽

Wheat Varieties ◽

Group Resistance ◽

Winter Wheat Varieties

Aim. To determine the resistance of winter wheat varieties to the main pathogens, to establish their stability and plasticity, to identify perspective sources of resistance. Methods. Laboratory – production of inoculum of pathogens; field – artificial inoculation,, assessment of variety stability; statistical calculation of disease severity, indicators of stability and plasticity. Results. In 2015–2017, the resistance of 43 varieties of winter wheat to the main pathogens of leaf diseases, common bunt and root rots was assessed. Resistance to powdery mildew was found in 32 varieties, tan spot – in 2, root rot – in 3, hard smut – in 2 varieties. Six varieties of winter wheat were characterized by group resistance. Varieties that combine high plasticity and stability of the sign of disease resistance have been identified. Conclusions. Valuable sources of resistance are winter wheat varieties with group resistance to common bunt and powdery mildew – Tradytsiia Odeska and Kurs; powdery mildew and tan spot – Nasnaga and Zolotonozhka; powdery mildew and root rot – Nezabudka and Shchedrist kyivska.Keywords: resistance, winter wheat, diseases, plasticity, stability.

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Investigations in the regulation of common bunt (Tilletia tritici) of winter wheat with regard to threshold values, cultivar susceptibility and non-chemical protection measures

Journal of Plant Diseases and Protection ◽

10.1007/bf03356228 ◽

2007 ◽

Vol 114 (6) ◽

pp. 269-275 ◽

Cited By ~ 6

Author(s):

F. Waldow ◽

M. Jahn

Keyword(s):

Winter Wheat ◽

Threshold Values ◽

Common Bunt ◽

Protection Measures ◽

Tilletia Tritici ◽

Chemical Protection ◽

Cultivar Susceptibility

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Genetic Improvement in Agronomic Traits of Hard Red Winter Wheat Cultivars 1919 to 1987

Crop Science ◽

10.2135/cropsci1988.0011183x002800050006x ◽

1988 ◽

Vol 28 (5) ◽

pp. 756-760 ◽

Cited By ~ 138

Author(s):

T. S. Cox ◽

J. P. Shroyer ◽

Liu Ben‐Hui ◽

R. G. Sears ◽

T. J. Martin

Keyword(s):

Winter Wheat ◽

Genetic Improvement ◽

Agronomic Traits ◽

Wheat Cultivars ◽

Hard Red Winter Wheat ◽

Winter Wheat Cultivars ◽

Red Winter Wheat

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Vernalization Response of Some Winter Wheat Cultivars (Triticum aestivum L.)

Czech Journal of Genetics and Plant Breeding ◽

10.17221/6242-cjgpb ◽

2012 ◽

Vol 38 (No. 3-4) ◽

pp. 97-103 ◽

Cited By ~ 3

Author(s):

J. Košner ◽

K. Pánková

Keyword(s):

Triticum Aestivum ◽

Winter Wheat ◽

Agronomic Traits ◽

Triticum Aestivum L ◽

Vernalization Requirement ◽

Photoperiod Response ◽

Vernalization Response ◽

Multiple Alleles ◽

Winter Wheat Cultivars ◽

The Given

For 17 cultivars of winter wheat (Triticum aestivum L.) different vernalization and photoperiod responses were detected. The effect of photoperiod sensitivity was not significantly changed by vernalization; different vernalization responses were probably due to the presence of multiple alleles at Vrn loci. The delay in heading depended on the vernalization deficit exponentially: y = Parameter (1) + (y0 – Parameter (1)) × EXP (Parameter (2) × (x – x0)). The dependence was shown to be general and significant for the given model in all the studied cultivars. Individual regressions characterised responses of cultivars to a deficit of vernalization treatment. Cluster analysis according to the characterisation obtained (full vernalization requirement, minimum vernalization requirement, insufficient vernalization and parameters of the dependence) showed the relationships between cultivars and enabled their grouping by similar profiles of vernalization, and, possibly, of photoperiod response. In individual cultivars, an attempt was made to use the model to predict performance for some agronomic traits.

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