The genetic architecture of seedling resistance to Septoria tritici blotch in the winter wheat doubled-haploid population Solitär × Mazurka

Partial resistance to Septoria tritici blotch (STB) and its inheritance were investigated in a doubled-haploid population of a cross between cvs. Arina and Riband. The former has good partial resistance whereas the latter is susceptible. In adult plant trials in polytunnels, STB disease scores were negatively correlated with heading date. Resistance was not specific to any of the three fungal isolates used in these tests. A quantitative trait locus (QTL) for partial resistance to STB was identified in Riband on chromosome 6B and is named QStb.psr-6B-1. No QTL controlling a major part of the Arina resistance was identified, suggesting that its resistance may be dispersed and polygenic. There was no correlation between the lines' mean disease scores at the seedling and adult stages, implying that partial resistance to STB is developmentally regulated. Seedling resistance to the isolate IPO323 was isolate-specific and controlled by a single gene in Arina, probably allelic with the Stb6 gene in cv. Flame that confers resistance to the same isolate. The implications of these results for wheat breeding programs are discussed.

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Genetic architecture of resistance to Septoria tritici blotch (Mycosphaerella graminicola) in European winter wheat

Molecular Breeding ◽

10.1007/s11032-013-9880-6 ◽

2013 ◽

Vol 32 (2) ◽

pp. 411-423 ◽

Cited By ~ 35

Author(s):

Sonja Kollers ◽

Bernd Rodemann ◽

Jie Ling ◽

Viktor Korzun ◽

Erhard Ebmeyer ◽

...

Keyword(s):

Winter Wheat ◽

Genetic Architecture ◽

Mycosphaerella Graminicola ◽

Septoria Tritici Blotch ◽

Septoria Tritici ◽

European Winter Wheat

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Identification and chromosomal location of major genes for resistance to Pyrenophora teres in a doubled-haploid barley population

Genome ◽

10.1139/g06-024 ◽

2006 ◽

Vol 49 (7) ◽

pp. 855-859 ◽

Cited By ~ 58

Author(s):

T L Friesen ◽

J D Faris ◽

Z Lai ◽

B J Steffenson

Keyword(s):

Doubled Haploid ◽

Doubled Haploid Population ◽

Pyrenophora Teres ◽

Net Blotch ◽

Seedling Resistance ◽

Drechslera Teres ◽

Haploid Population ◽

Barley Population ◽

Spot Type ◽

Simple Sequence

Net blotch, caused by Pyrenophora teres, is one of the most economically important diseases of barley worldwide. Here, we used a barley doubled-haploid population derived from the lines SM89010 and Q21861 to identify major quantitative trait loci (QTLs) associated with seedling resistance to P. teres f. teres (net-type net blotch (NTNB)) and P. teres f. maculata (spot-type net blotch (STNB)). A map consisting of simple sequence repeat (SSR) and amplified fragment length polymorphism (AFLP) markers was used to identify chromosome locations of resistance loci. Major QTLs for NTNB and STNB resistance were located on chromosomes 6H and 4H, respectively. The 6H locus (NTNB) accounted for as much as 89% of the disease variation, whereas the 4H locus (STNB resistance) accounted for 64%. The markers closely linked to the resistance gene loci will be useful for marker-assisted selection.Key words: disease resistance, Drechslera teres, molecular markers.

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Confirmation of QTL mapping and marker validation for partial seedling resistance to crown rot in wheat line '2-49'

Australian Journal of Agricultural Research ◽

10.1071/ar05419 ◽

2006 ◽

Vol 57 (9) ◽

pp. 967 ◽

Cited By ~ 16

Author(s):

B. C. Y. Collard ◽

R. Jolley ◽

W. D. Bovill ◽

R. A. Grams ◽

G. B. Wildermuth ◽

...

Keyword(s):

Ssr Markers ◽

Doubled Haploid ◽

Small Sample ◽

Crown Rot ◽

Doubled Haploid Population ◽

Seedling Resistance ◽

Haploid Population ◽

Rot Disease ◽

A Minor ◽

Partial Crown

We have tested the efficacy of putative microsatellite single sequence repeat (SSR) markers, previously identified in a 2-49 (Gluyas Early/Gala) × Janz doubled haploid wheat (Triticum aestivum) population, as being linked to partial seedling resistance to crown rot disease caused by Fusarium pseudograminearum. The quantitative trait loci (QTLs) delineated by these markers have been tested for linkage to resistance in an independent Gluyas Early × Janz doubled haploid population. The presence of a major QTL on chromosome 1DL (QCr.usq-1D1) and a minor QTL on chromosome 2BS (QCr.usq-2B1) was confirmed. However, a putative minor QTL on chromosome 2A was not confirmed. The QTL on 1D was inherited from Gluyas Early, a direct parent of 2-49, whereas the 2B QTL was inherited from Janz. Three other putative QTLs identified in 2-49 × Janz (on 1AL, 4BL, and 7BS) were inherited by 2-49 from Gala and were not able to be confirmed in this study. The screening of SSR markers on a small sample of elite wheat genotypes indicated that not all of the most tightly linked SSR markers flanking the major QTLs on 1D and 1A were polymorphic in all backgrounds, indicating the need for additional flanking markers when backcrossing into some elite pedigrees. Comparison of SSR haplotypes with those of other genotypes exhibiting partial crown rot resistance suggests that additional, novel sources of crown rot resistance are available.

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Mapping QTL controlling agronomic traits in a doubled haploid population of winter oilseed rape (Brassica napus L.)

Journal of Genetics ◽

10.1007/s12041-018-1044-3 ◽

2018 ◽

Vol 97 (5) ◽

pp. 1389-1406 ◽

Cited By ~ 3

Author(s):

Farshad Fattahi ◽

Barat Ali Fakheri ◽

Mahmood Solouki ◽

Christian Möllers ◽

Abbas Rezaizad

Keyword(s):

Brassica Napus ◽

Oilseed Rape ◽

Doubled Haploid ◽

Agronomic Traits ◽

Doubled Haploid Population ◽

Winter Oilseed Rape ◽

Brassica Napus L ◽

Mapping Qtl ◽

Haploid Population

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Accuracy of within- and among-family genomic prediction for Fusarium head blight and Septoria tritici blotch in winter wheat

Theoretical and Applied Genetics ◽

10.1007/s00122-018-3264-6 ◽

2018 ◽

Vol 132 (4) ◽

pp. 1121-1135 ◽

Cited By ~ 14

Author(s):

Cathérine Pauline Herter ◽

Erhard Ebmeyer ◽

Sonja Kollers ◽

Viktor Korzun ◽

Tobias Würschum ◽

...

Keyword(s):

Winter Wheat ◽

Fusarium Head Blight ◽

Genomic Prediction ◽

Septoria Tritici Blotch ◽

Septoria Tritici ◽

Head Blight

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Mapping of grain alkali digestion trait using a Cheongcheong/Nagdong doubled haploid population in rice

Journal of Plant Biotechnology ◽

10.5010/jpb.2016.43.1.76 ◽

2016 ◽

Vol 43 (1) ◽

pp. 76-81 ◽

Cited By ~ 2

Author(s):

Hak Yoon Kim ◽

Kyung-Min Kim

Keyword(s):

Doubled Haploid ◽

Doubled Haploid Population ◽

Haploid Population ◽

Alkali Digestion

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Precision phenotyping reveals novel loci for quantitative resistance to septoria tritici blotch in European winter wheat

10.1101/502260 ◽

2018 ◽

Cited By ~ 1

Author(s):

Steven Yates ◽

Alexey Mikaberidze ◽

Simon Krattinger ◽

Michael Abrouk ◽

Andreas Hund ◽

...

Keyword(s):

Disease Resistance ◽

Winter Wheat ◽

High Throughput ◽

Quantitative Resistance ◽

Small Chromosome ◽

Snp Markers ◽

Automated Image Analysis ◽

Septoria Tritici Blotch ◽

Septoria Tritici ◽

Limiting Factor

Accurate, high-throughput phenotyping for quantitative traits is the limiting factor for progress in plant breeding. We developed automated image analysis to measure quantitative resistance to septoria tritici blotch (STB), a globally important wheat disease, enabling identification of small chromosome intervals containing plausible candidate genes for STB resistance. 335 winter wheat cultivars were included in a replicated field experiment that experienced natural epidemic development by a highly diverse but fungicide-resistant pathogen population. More than 5.4 million automatically generated phenotypes were associated with 13,648 SNP markers to perform a GWAS. We identified 26 chromosome intervals explaining 1.9-10.6% of the variance associated with four resistance traits. Seventeen of the intervals were less than 5 Mbp in size and encoded only 173 genes, including many genes associated with disease resistance. Five intervals contained four or fewer genes, providing high priority targets for functional validation. Ten chromosome intervals were not previously associated with STB resistance. Our experiment illustrates how high-throughput automated phenotyping can accelerate breeding for quantitative disease resistance. The SNP markers associated with these chromosome intervals can be used to recombine different forms of quantitative STB resistance that are likely to be more durable than pyramids of major resistance genes.

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