Differential seedling resistance to the eyespot pathogens, Oculimacula yallundae and Oculimacula acuformis, conferred by Pch2 in wheat and among accessions of Triticum monococcum

2010 ◽  
Vol 59 (5) ◽  
pp. 819-828 ◽  
Author(s):  
C. Burt ◽  
T. W. Hollins ◽  
N. Powell ◽  
P. Nicholson
Keyword(s):  
Triticum Monococcum ◽  
Seedling Resistance ◽  
Oculimacula Yallundae ◽  
Oculimacula Acuformis

Investigations in the Triticinae IV. Disease reactions of species of Triticum and Aegilops and of amphidiploids between them

1955 ◽  
Vol 46 (2) ◽  
pp. 232-246 ◽  
Author(s):  
G. D. H. Bell ◽  
F. G. H. Lupton
Keyword(s):  
Plant Resistance ◽  
Triticum Monococcum ◽  
Mature Plant ◽  
Field Observations ◽  
Wheat Species ◽  
Sources Of Resistance ◽  
Seedling Resistance ◽  
Mature Plant Resistance ◽  
Numerous Species ◽  
Aegilops Caudata

1. Observations have been made of the seedling reactions of species of Triticum and Aegilops and of amphidiploids between them to races of Puccinia glumarum, P. triticina, P. graminis and Erysiphe graminis. These observations have been compared with field observations on mature plants. The work on P. graminis and much of that on P. triticina was carried out by Dr R. C. McGinnis of the Dominion Rust Research Laboratories, Winnipeg, Canada.2. Seedling and mature plant resistance to P. glumarum has been found in Triticum monococcum, Aegilops caudata and A. ovata. Resistance was not shown by amphidiploids of T. monococcum and A. caudata with susceptible species of Triticum, but was shown by some amphidiploids involving A. ovata; T. timopheevi and A. speltoides were susceptible to certain races as seedlings but resistant as mature plants in the field.3. Seedling resistance to all the races of P. triticina used in these investigations was shown by A. caudata and resistance to certain races by certain other species. Amphidiploids involving A. caudata were resistant to all races, but other amphidiploids were resistant to some races and susceptible to others.4. Seedling and mature plant resistance to P. graminis was shown by A. caudata. A. ovata and A. speltoides were resistant as mature plants, and only slightly infected as seedlings. None of the amphidiploids tested was completely resistant at the seedling stage; certain amphidiploids involving these three species were, however, only slightly infected as mature plants, and may be useful as sources of resistance to race 15B.5. Resistance to E. graminis was shown by T. carthlicum, T. dicoccum, T. timopheevi and by numerous species of Aegilops. Amphidiploids of T. carthlicum, T. dicoccum, T. timopheevi and A. caudata with diploid wheat species were resistant to E. graminis, but those with susceptible tetraploid wheats were susceptible. Other intergeneric amphidiploids (with two exceptions) were resistant.

scholarly journals Wykorzystanie markerów molekularnych i fenotypowych do identyfikacji genów odporności pszenicy na łamliwość źdźbła powodowaną przez Oculimacula yallundae i O. acuformis

2020 ◽  
pp. 3-14
Author(s):  
Maciej Majka ◽  
Magdalena Gawłowska ◽  
Adriana Twardawska ◽  
Marek Korbas ◽  
Jakub Danielewicz ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Triticum Aestivum L ◽  
Oculimacula Yallundae ◽  
Oculimacula Acuformis

Łamliwość źdźbła to jedna z ważniejszych chorób pszenicy uprawnej (Triticum aestivum L.) powodowana przez dwa grzyby patogeniczne Oculimacula yallundae i Oculimacula acuformis. Istnieje kilka źródeł odporności na ten patogen, lecz jak dotąd tylko dwa geny Pch1 i Pch2 zostały przniesione do pszenicy uprawnej i warunkują odporność. Wybranie najkorzystniejszych markerów molekularnych dla określenia obecności genów odporności na łamliwość źdźbła u pszenicy może poprawić skuteczność i dokładność przy wyborze genotypów odpornych na tę chorobę. Celem pracy było określenie efektywności markerów molekularnych i markera izoenzymatycznego dla genów Pch1 i Pch2 oraz wytypowanie genotypów pszenicy ozimej o podwyższonej odporności w odniesieniu do porażenia roślin w testach inokulacyjnych przeprowadzonych w fazie siewki oraz rośliny dojrzałej. Materiał badawczy stanowiło 159 linii hodowlanych pszenicy ozimej oraz pięć odmian kontrolnych: Artist, Kilimanjaro, Kometa, Patras i Rendezvous. Do identyfikacji genów odporności wykorzystano pięć markerów, trzy do identyfikacji genu Pch1 (EpD1b, XustSSR2001-7DL, Xorw1) oraz dwa dla genu Pch2 (Xcfa2040, Xwmc525). Biorąc pod uwagę analizę molekularną genów, wyniki inokulacji siewek oraz wyniki porażenia źdźbeł dojrzałych roślin, stwierdzono brak objawów porażenia źdźbeł u linii/odmian pszenicy ozimej, u których zidentyfikowano oba geny Pch1 i Pch2. Stwierdzono u nich również najniższe porażenie siewek. Najwyższy procent porażonych źdźbeł odnotowano u genotypów, gdzie nie stwierdzono genów Pch1 i Pch2. U tych genotypów zaobserwowano również najwyższe porażenie w teście siewkowym. Wykazano, że obecność genów Pch1 i Pch2 lub ich brak nie wpływała istotnie na plon ziarna oraz na masę tysiąca ziarniaków (MTZ). U genotypów z genami Pch1 i Pch2 stwierdzono nieznacznie wyższe wartości dla obu parametrów technologicznych.  

scholarly journals Fungicide resistance status in French populations of the wheat eyespot fungi Oculimacula acuformis and Oculimacula yallundae

2012 ◽  
Vol 69 (1) ◽  
pp. 15-26 ◽  
Author(s):  
Pierre Leroux ◽  
Michel Gredt ◽  
Florent Remuson ◽  
Annie Micoud ◽  
Anne-Sophie Walker
Keyword(s):  
Fungicide Resistance ◽  
Oculimacula Yallundae ◽  
Oculimacula Acuformis

Transfer of leaf and stripe rust resistance genes Lr19 and Yr15 in to a susceptible wheat cultivar HS295

2019 ◽  
Vol 79 (3) ◽  
Author(s):  
Pratima Sharma ◽  
Madhu Patial ◽  
Dharam Pal ◽  
S. C. Bhardwaj ◽  
Subodh . Kumar ◽  
...  
Keyword(s):  
Rust Resistance ◽  
Ssr Marker ◽  
Scar Marker ◽  
Adult Plant Resistance ◽  
Wheat Cultivar ◽  
Stripe Rust Resistance ◽  
Adult Plant ◽  
Potential Donor ◽  
Seedling Resistance ◽  
Breeding Lines

The present study was conducted to transfer multiple rust resistance in a popular but rust susceptible wheat cultivar HS295. Selected derivatives WBM3632 and WBM3635 have been developed from a cross, HS295*2/FLW20//HS295*2/ FLW13 using bulk-pedigree method of breeding. Advance line WBM3697 selected from a breeding line WBM3532 was named as HS661. This line was evaluated for seedling resistance to a wide array of rust pathotypes and found to possess resistance to all the three rusts. HS661 was also tested under field conditions and showed adult plant resistance to leaf rust (AC1=0.6), stem rust (ACI=2.7) and strpe rust (AC1=3.8). Among 34 F3 lines, 28 were tested positive for SSR marker Xwmc221 indicating the presence of Lr19/Sr25. Out of 14 selected F4 lines from F3, nine were homozygous positive for Lr19/Sr25. The advanced breeding lines viz., WBM3632 (WBM3697) and WBM3635 were also positive for Lr19/Sr25 with SCAR marker SCS265512. SSR marker Xgwm1 producing 215 bp band in Avst-15, FLW13 and HS661 confirmed the presence of Yr15 . Agronomically, HS661 was comparable with recipient variety HS295 and superior to a standard check HS490 under late sown restricted irrigation production conditions of NHZ. HS661 may serve as a potential donor for creating new usable variability against all the three rusts.

scholarly journals A wheat chromosome 5AL region confers seedling resistance to both tan spot and Septoria nodorum blotch in two mapping populations

2019 ◽  
Vol 7 (6) ◽  
pp. 809-818 ◽  
Author(s):  
Wenjing Hu ◽  
Xinyao He ◽  
Susanne Dreisigacker ◽  
Carolina P. Sansaloni ◽  
Philomin Juliana ◽  
...  
Keyword(s):  
Wheat Chromosome ◽  
Tan Spot ◽  
Septoria Nodorum ◽  
Seedling Resistance ◽  
Septoria Nodorum Blotch ◽  
Mapping Populations

scholarly journals Stripe rust resistance gene Yr34 (synonym Yr48) is located within a distal translocation of Triticum monococcum chromosome 5AmL into common wheat

2021 ◽  
Author(s):  
Shisheng Chen ◽  
Joshua Hegarty ◽  
Tao Shen ◽  
Lei Hua ◽  
Hongna Li ◽  
...  
Keyword(s):  
Resistance Gene ◽  
Common Wheat ◽  
Stripe Rust ◽  
Rust Resistance ◽  
Triticum Monococcum ◽  
Rust Resistance Gene ◽  
Stripe Rust Resistance ◽  
Polyploid Wheat ◽  
Stripe Rust Resistance Gene ◽  
A Genome

AbstractKey messageThe stripe rust resistance geneYr34 was transferred to polyploid wheat chromosome 5AL from T. monococcumand has been used for over two centuries.Wheat stripe (or yellow) rust, caused by Puccinia striiformis f. sp. tritici (Pst), is currently among the most damaging fungal diseases of wheat worldwide. In this study, we report that the stripe rust resistance gene Yr34 (synonym Yr48) is located within a distal segment of the cultivated Triticum monococcum subsp. monococcum chromosome 5AmL translocated to chromosome 5AL in polyploid wheat. The diploid wheat species Triticum monococcum (genome AmAm) is closely related to T. urartu (donor of the A genome to polyploid wheat) and has good levels of resistance against the stripe rust pathogen. When present in hexaploid wheat, the T. monococcum Yr34 resistance gene confers a moderate level of resistance against virulent Pst races present in California and the virulent Chinese race CYR34. In a survey of 1,442 common wheat genotypes, we identified 5AmL translocations of fourteen different lengths in 17.5% of the accessions, with higher frequencies in Europe than in other continents. The old European wheat variety “Mediterranean” was identified as a putative source of this translocation, suggesting that Yr34 has been used for over 200 years. Finally, we designed diagnostic CAPS and sequenced-based markers that will be useful to accelerate the deployment of Yr34 in wheat breeding programs to improve resistance to this devastating pathogen.

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