scholarly journals Association mapping of Stagonospora nodorum blotch resistance in modern European winter wheat varieties

2007 ◽  
Vol 115 (5) ◽  
pp. 697-708 ◽  
Author(s):  
L. Tommasini ◽  
T. Schnurbusch ◽  
D. Fossati ◽  
F. Mascher ◽  
B. Keller
Keyword(s):  
Winter Wheat ◽  
Association Mapping ◽  
Stagonospora Nodorum ◽  
Wheat Varieties ◽  
Stagonospora Nodorum Blotch ◽  
European Winter Wheat ◽  
Winter Wheat Varieties

Short Day Induction of Inflorescence Initiation in Some Winter Wheat Varieties

1987 ◽  
Vol 14 (3) ◽  
pp. 277 ◽  
Author(s):  
LT Evans
Keyword(s):  
Winter Wheat ◽  
High Irradiance ◽  
Inflorescence Development ◽  
Wheat Varieties ◽  
Short Day ◽  
Long Day ◽  
European Winter Wheat ◽  
Lower Irradiance ◽  
Short Days ◽  
Winter Wheat Varieties

Experiments in the Canberra phytotron with several European winter wheat varieties, especially cv. Templar, have shown that their need for vernalisation at low temperature can be replaced entirely by growth in short days at 21/16°C for the same period. In fact, although wheat is usually classified as a long day plant, inflorescence initiation at 21/16°C in unvernalised plants was twice as rapid in 8 h photoperiods as in 16 h ones. Short day induction was fastest in photoperiods of less than 12 h and was relatively insensitive to irradiance. Inflorescence development following initiation was faster the longer the photoperiod. At high irradiance, anthesis eventually occurred in 8 h days, but not at lower irradiance. These wheats are therefore short-long day plants, and may appear to be indifferent to daylength if only their time to anthesis is observed. Although short days can replace low temperatures, there are several important differences in their modes of action, and short day induction is better not referred to as short day vernalisation. Vernalisation of developing grains in the ear was more effective in long days.

scholarly journals Evaluation and Association Mapping of Resistance to Tan Spot and Stagonospora Nodorum Blotch in Adapted Winter Wheat Germplasm

Plant Disease ◽  
2015 ◽  
Vol 99 (10) ◽  
pp. 1333-1341 ◽  
Author(s):  
Zhaohui Liu ◽  
Ibrahim El-Basyoni ◽  
Gayan Kariyawasam ◽  
Guorong Zhang ◽  
Allan Fritz ◽  
...  
Keyword(s):  
United States ◽  
Winter Wheat ◽  
Association Mapping ◽  
Great Plains ◽  
The United States ◽  
Tan Spot ◽  
Stagonospora Nodorum ◽  
Northern Great Plains ◽  
Stagonospora Nodorum Blotch ◽  
Pyrenophora Tritici Repentis

Tan spot and Stagonospora nodorum blotch (SNB), often occurring together, are two economically significant diseases of wheat in the Northern Great Plains of the United States. They are caused by the fungi Pyrenophora tritici-repentis and Parastagonospora nodorum, respectively, both of which produce multiple necrotrophic effectors (NE) to cause disease. In this work, 120 hard red winter wheat (HRWW) cultivars or elite lines, mostly from the United States, were evaluated in the greenhouse for their reactions to the two diseases as well as NE produced by the two pathogens. One P. nodorum isolate (Sn4) and four Pyrenophora tritici-repentis isolates (Pti2, 331-9, DW5, and AR CrossB10) were used separately in the disease evaluations. NE sensitivity evaluation included ToxA, Ptr ToxB, SnTox1, and SnTox3. The numbers of lines that were rated highly resistant to individual isolates ranged from 11 (9%) to 30 (25%) but only six lines (5%) were highly resistant to all isolates, indicating limited sources of resistance to both diseases in the U.S. adapted HRWW germplasm. Sensitivity to ToxA was identified in 83 (69%) of the lines and significantly correlated with disease caused by Sn4 and Pti2, whereas sensitivity to other NE was present at much lower frequency and had no significant association with disease. As expected, association mapping located ToxA and SnTox3 sensitivity to chromosome arm 5BL and 5BS, respectively. A total of 24 potential quantitative trait loci was identified with −log (P value) > 3.0 on 12 chromosomes, some of which are novel. This work provides valuable information and tools for HRWW production and breeding in the Northern Great Plains.

Did Modern Plant Breeding Lead to Genetic Erosion in European Winter Wheat Varieties?

Crop Science ◽  
2007 ◽  
Vol 47 (1) ◽  
pp. 343-349 ◽  
Author(s):  
Xiu-Qiang Huang ◽  
Markus Wolf ◽  
Martin W. Ganal ◽  
Simon Orford ◽  
Robert M.D. Koebner ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Plant Breeding ◽  
Genetic Erosion ◽  
Wheat Varieties ◽  
European Winter Wheat ◽  
Winter Wheat Varieties

Rapid screening of selected European winter wheat varieties and segregating populations for the Glu-D1d allele using PCR

1996 ◽  
Vol 115 (6) ◽  
pp. 451-454 ◽  
Author(s):  
J. P. Varghese ◽  
D. Struss ◽  
M. E. Kazman
Keyword(s):  
Winter Wheat ◽  
Rapid Screening ◽  
Wheat Varieties ◽  
European Winter Wheat ◽  
Winter Wheat Varieties

scholarly journals Leaf rust occurrence in European winter wheat varieties and breeding lines

2000 ◽  
Vol 36 (No. 4) ◽  
pp. 141-146
Author(s):  
L. Věchet
Keyword(s):  
Winter Wheat ◽  
Leaf Rust ◽  
Hypersensitive Reaction ◽  
European Countries ◽  
Wheat Varieties ◽  
Breeding Lines ◽  
Resistant Varieties ◽  
European Winter Wheat ◽  
Moderately Resistant ◽  
Winter Wheat Varieties

In 1998 and 1999, 52 winter wheat varieties and breeding lines originated from ten European countries were tested for their reaction to leaf rust, the inoculum was a mixture of races UN3-61SaBa and UN13-77SaBa. Twenty six varieties and lines stayed in the same group (susceptible, moderately susceptible, moderate, moderately resista nt) in both years, with the majority being moderately resistant. Of the Czech varieties Asta, Rexia and VIada stayed in the same group in both years. Some varieties moved from one group in 1998 to another in 1999. Some of the moderately resistant varieties and lines (Hereward, WW2568, P8634, Trakos, WW251 0, Asset, WW2564) showed a hypersensitive reaction (chlorosis, necrosis). There were differences in the number of diseased plants between groups with a different reaction to leaf rust mainly at the beginning of the epidemic

Dominant male-sterile populations for association mapping and introgression of exotic wheat germplasm

2008 ◽  
Vol 59 (5) ◽  
pp. 470 ◽  
Author(s):  
E. L. Heffner ◽  
O. Chomdej ◽  
K. R. Williams ◽  
M. E. Sorrells
Keyword(s):  
Winter Wheat ◽  
Association Mapping ◽  
Gene Pool ◽  
Recurrent Selection ◽  
Dominant Male ◽  
Male Sterile ◽  
Wheat Varieties ◽  
Wheat Germplasm ◽  
Soft Winter Wheat ◽  
Winter Wheat Varieties

The introgression of exotic wheat germplasm such as synthetic hexaploid (tetraploid × diploid amphiploid) wheat (Triticum aestivum L.) into an adapted gene pool has the potential to amplify the genetic variation for complex traits. The dominant male-sterile gene can be used to facilitate recurrent selection in wheat, thus increasing the opportunity for genetic recombination between exotic and cultivated genomes and the identification and retention of desirable alleles. Our dominant male-sterile recurrent selection project began in 1983 with the intermating of the source germplasm (Chris hard red spring wheat in Triticum tauschii cytoplasm) with 34 soft winter lines and varieties, intermated without selection for 3 generations, and then selecting male-sterile plants for agronomic type each season. After 20 generations of recurrent selection, we extracted 94 inbred lines without selection during inbreeding except for fertility. Those lines were evaluated for linkage disequilibrium (LD) on the 5A chromosome for comparison with an earlier study involving 95 elite soft winter wheat varieties of similar genetic background. For the male-sterile population-derived lines, LD decayed within 1 cM (r2 < 0.1) compared with 5 cM in the previous report for soft winter wheat varieties. This approach to introgression facilitates the potential use of synthetic wheat and other unadapted germplasm for expanding the gene pool and provides a potential resource for high-resolution association mapping of genes controlling traits of interest.

scholarly journals Coleoptile length and plant height of modern tall and semi-dwarf European winter wheat varieties

2011 ◽  
Vol 80 (3) ◽  
pp. 197-203 ◽  
Author(s):  
Žilvinas Liatukas ◽  
Vytautas Ruzgas
Keyword(s):  
Winter Wheat ◽  
Plant Height ◽  
Southern Europe ◽  
Coleoptile Length ◽  
Wheat Varieties ◽  
European Origin ◽  
Wheat Germplasm ◽  
European Winter Wheat ◽  
Winter Wheat Varieties

A total of 124 recent winter wheat accessions of European origin were screened for coleoptile length and plant height. Most of the accessions (74.2%) possessed a coleoptile length ranging between 5.00 and 7.00 cm. The German varieties Ebi, Pegassos, Flair without <em>Rht </em>genes had a coleoptile length of 9.08, 9.43, 9.56 cm and a plant height of 97, 95 and 98 cm, respectively. The Serbian variety Pobeda possessing <em>Rht8 </em>had a coleoptile length of 9.14 cm and a plant height of 71 cm. The varieties possessing <em>Rht-B1b</em>, <em>Rht-D1b </em>had a significantly shorter mean coleoptile length (5.45 cm) and mean plant height (84.5 cm) than the varieties without <em>Rht </em>genes (7.41 and 99.6 cm). The correlation between coleoptile length and plant height was medium (r = 0.613, <em>p </em>&lt; 0.01) when the calculation excluded the varieties from Central and Southern Europe. The similar plant height, but not coleoptile length of the varieties possessing different dwarfing factors enables development of novel varieties with desirable height and coleoptile length from the European winter wheat germplasm.

Stability of Adult-plant Resistance to Septoria tritici blotch in 24 European Winter Wheat Varieties Across Nine Field Environments

2011 ◽  
pp. no-no ◽  
Author(s):  
Ayla Schilly ◽  
Peter Risser ◽  
Erhard Ebmeyer ◽  
Lorenz Hartl ◽  
Jochen C. Reif ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Plant Resistance ◽  
Adult Plant Resistance ◽  
Septoria Tritici Blotch ◽  
Septoria Tritici ◽  
Adult Plant ◽  
Wheat Varieties ◽  
European Winter Wheat ◽  
Winter Wheat Varieties

Correlation between Ecological Plasticity of Elite Winter Wheat Varieties and DNA Methylation Pattern Polymorphism within Variety

2016 ◽  
Vol 12 (2) ◽  
pp. 50-59 ◽  
Author(s):  
O.P. Kravets ◽  
◽  
D.O. Sokolova ◽  
A.M. Berestyana ◽  
O.R. Shnurenko ◽  
...  
Keyword(s):  
Dna Methylation ◽  
Winter Wheat ◽  
Methylation Pattern ◽  
Wheat Varieties ◽  
Ecological Plasticity ◽  
Dna Methylation Pattern ◽  
Pattern Polymorphism ◽  
Winter Wheat Varieties
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