Resistance of triticale to wheat leaf rust (Puccinia triticina)

Hanzalová, A.; Bartoš, Pavel

doi:10.17221/100/2010-cjgpb

Cited by 12 publications

(10 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The two Pt races 3SA145 and 3SA248 collected from wheat were virulent to 49 and 52 of the triticale entries, respectively. These results support the findings by Hanzalovā and Bartoš (2011) that Pt isolates from wheat are less likely to cause disease in triticale, whereas isolates collected from triticale were found more virulent to triticale than wheat. As triticale is mostly planted as a forage crop or cover crop in vineyards in SA and therefore left unsprayed, the increased susceptibility to wheat leaf rust races can contribute to the build-up of inoculum and consequent infection of commercial wheat productions.…”

Section: Discussionsupporting

confidence: 91%

Response of an International Triticale Collection toPuccinia triticinaandPuccinia reconditasensu stricto and Assessment of Temperature Sensitivity in Leaf Rust Isolates

Yekelo

Rothmann

Bender

et al. 2019

Cereal Research Communications

View full text Add to dashboard Cite

Triticale is derived from a cross between wheat and rye and the leaf rust pathogen of wheat, Puccinia triticina (Pt), and that of rye, P. recondita sensu stricto (Pr), can potentially cause disease in this crop. Recent studies showed that wheat rust fungi could adapt to warmer temperatures. In this paper, we report on the comparative virulence of three Pt races and one Pr isolate (all were collected in South Africa) on triticale as well as their in vitro response to temperature. Seedling infection types (SITs) of 169 triticale entries to Pt races 3SA144 (North American code SDDN), 3SA145 (CCPS) and 3SA248 (CFPS) and Pr isolate UVPr2 revealed that 3SA144 is the most virulent with 106 triticale entries found susceptible to this race. The three Pt races were avirulent to the four rye cultivars included as controls. UVPr2 was avirulent on all the triticale entries and 49 entries were considered resistant to the Pt races tested. Freshly harvested urediniospores of the above isolates were tested at constant temperature regimes of 10 °C, 22.5 °C and 35 °C to study germination characteristics. Mean urediniospore germination percentages as determined for 3SA144 (61.3%) and UVPr2 (62.6%) were significantly lower when compared to 3SA145 (83.7%) and 3SA248 (84.9%). Race 3SA144 was most sensitive to the higher temperature regime of 35 °C (5.2% germination). Among the investigated races, 3SA144 showed significantly lower mean germ tube elongation rates at all three incubation temperatures. This is the first report of differences in temperature adaptation between Pt races from SA.

show abstract

Section: Discussionsupporting

confidence: 91%

Response of an International Triticale Collection toPuccinia triticinaandPuccinia reconditasensu stricto and Assessment of Temperature Sensitivity in Leaf Rust Isolates

Yekelo

Rothmann

Bender

et al. 2019

Cereal Research Communications

View full text Add to dashboard Cite

show abstract

“…Consequently, the UPGMA dendrogram displayed two virulence groups G1 and G2 comprising isolates of mixed host origin. Hanzalová and Bartoš (2011) demonstrated that isolates of Pt collected from triticale were more virulent to triticale cultivars than isolates from wheat, and that the frequency of virulence for Lr2b among these isolates was higher. However, in our study, the frequency of virulence to gene Lr2a was significantly higher in the G2 virulence group, which comprised isolates of mixed host origin (wheat and triticale).…”

Section: Discussionmentioning

confidence: 99%

Assessing new SSR markers for utility and informativeness in genetic studies of brown rust fungi on wheat, triticale, and rye

et al. 2021

View full text Add to dashboard Cite

The aim of the present study was to validate new simple‐sequence repeat (SSR) markers and use them to assess genetic variability among 24 isolates of Puccinia triticina collected from wheat (Pt‐wheat) and triticale (Pt‐triticale), and 15 isolates of P. recondita f. sp. secalis (Prs) collected from rye. The Pt and Prs isolates were tested for virulence on a set of 35 Thatcher wheat near‐isogenic lines, eight rye lines with known resistance genes, and 53 triticale cultivars with uncharacterized leaf rust resistance. Molecular genotypes were determined using a newly developed set of 34 SSR microsatellite primer pairs. All SSR markers tested on Pt isolates successfully amplified fragments of appropriate size. When tested on the Prs isolates, 21 out of the 34 Pt SSRs amplified expected fragments. Sixteen of these 21 SSRs were polymorphic, providing for the first time microsatellite markers to study genetic variation in Prs. Based on virulence data, variation among Prs isolates was low, probably due to the small number of rye differential lines available. Much higher variation for virulence was observed within the collection of Pt isolates from wheat and triticale, and two separate groups were established with mixed host origin. Substantial genetic variation was detected among the isolates studied with the SSR markers, assuming two different models of SSR evolution (infinite alleles model and stepwise mutation model). The newly developed set of SSR markers proved their effectiveness in detecting genetic variation and should be useful in further population genetics investigations of the two pathogens.

show abstract

“…This disease occurs mainly on the leaf blade, producing small elliptical orange-red pustules on the upper surface and causing premature defoliation. It causes both yield losses and downgrading in quality (Hanzalová and Bartoš, 2011) and its natural populations virulence is higher on triticale in comparison to wheat (Mikhailova et al, 2009). During the evolution, plants have elaborated large number of resistant genes (R genes) as a part of their defense system.…”

Section: Introductionmentioning

confidence: 99%

Molecular Identification of Triticale Introgression Lines Carrying Leaf Rust Resistance Genes Transferred From Aegilops Kotschyi Boiss. and Ae. Tauschii Coss.

Kwiatek

Belter

Ulaszewski

et al. 2021

Preprint

View full text Add to dashboard Cite

Triticale (×Triticosecale Wittmack) is a commercial hybrid harboring wheat (Triticum sp.) and rye (Secale cereale L.) genomes. The limited genetic diversity of this crop resulted in the collapse of fungal disease resistance. Leaf rust disease, caused by Puccinia triticina Eriks. is reported to reduce the triticale yield significantly (more than 30%). There is a need to enlarge the genetic variability of this crop including leaf resistance genes. The main aim of this research was to transfer Lr39 and Lr54 leaf rust resistance genes into triticale from Aegilops tauschii and Ae. kotschyi, respectively. A reaction of seedlings of 200 plants of two triticale-Aegilops translocation lines (Bogo-2Dt.2R and Sekundo-2Sk.2R) was compared after inoculation with a natural mixture of P. triticina races, specific to triticale. Before inoculation, each plant was screened using molecular cytogenetics and molecular markers linked to leaf rust resistance genes. Presence of Aegilops chromosome segments was confirmed using genomic in situ hybridization (GISH). Lr39 and Lr54 leaf rust resistance genes were identified using Xgdm35 and S14 molecular markers, respectively. After inoculation, a significant improvement of resistance severity was observed in Sekundo-2Sk.2R in comparison with triticale cv. Sekundo plants. The resistance level of Bogo-2Dt.2R did not differ compared to triticale cv. Bogo plants. It was shown, that Lr39 gene did not increase the leaf rust resistance level of triticale cv. Bogo.

show abstract

Resistance of triticale to wheat leaf rust (Puccinia triticina)

Cited by 12 publications

References 11 publications

Response of an International Triticale Collection toPuccinia triticinaandPuccinia reconditasensu stricto and Assessment of Temperature Sensitivity in Leaf Rust Isolates

Response of an International Triticale Collection toPuccinia triticinaandPuccinia reconditasensu stricto and Assessment of Temperature Sensitivity in Leaf Rust Isolates

Assessing new SSR markers for utility and informativeness in genetic studies of brown rust fungi on wheat, triticale, and rye

Molecular Identification of Triticale Introgression Lines Carrying Leaf Rust Resistance Genes Transferred From Aegilops Kotschyi Boiss. and Ae. Tauschii Coss.

Contact Info

Product

Resources

About