Fusarium head blight resistance in Aegilops tauschii

Brisco, Elizabeth I.; Brown, Linda K.; Olson, Eric

doi:10.1007/s10722-017-0495-3

Cited by 10 publications

(18 citation statements)

References 17 publications

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“…tauschii accessions may have different QTL because they had different effects on the FHB severity reduction in their SHW lines. Brisco et al (2017) recently evaluated 109 Ae. tauschii accessions in the greenhouse and detected significant variation in FHB severity.…”

Section: Discussionmentioning

confidence: 99%

“…Among the 10 Ae. tauschii accessions in the present study, two accessions, namely CIae 25 (TA1703) and TA 2377, were evaluated for FHB resistance by Brisco et al (2017) and they were identified as moderately susceptible-moderately resistant and susceptible, respectively. However, in our experiment, their SHW lines (SW8 and SW62) had significant reductions in FHB severities over their durum parent Langdon in two (FHB16 and FHBGH) and three environments, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Several FHB resistance QTL were identified in durum wheat (Somers et al, 2006; Zhang et al, 2014; Zhao et al, 2018a), T. dicoccoides (Otto et al, 2002; Stack and Faris, 2006; Chen et al, 2007; Gladysz et al, 2007; Kumar et al, 2007; Buerstmayr et al, 2013), T. dicoccum (Buerstmayr et al, 2012; Zhang et al, 2014), and T. carthlicum (Somers et al, 2006). Brisco et al (2017) identified five and seven Ae. tauschii accessions showing resistance and moderate resistance, respectively, suggesting that Ae.…”

Section: Introductionmentioning

confidence: 99%

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Genetic Diversity and Resistance to Fusarium Head Blight in Synthetic Hexaploid Wheat Derived From Aegilops tauschii and Diverse Triticum turgidum Subspecies

et al. 2018

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Synthetic hexaploid wheat (SHW) can serve as a bridge for the transfer of useful genes from Aegilops tauschii and tetraploid wheat (Triticum turgidum) into common wheat (T. aestivum). The objective of this study was to evaluate 149 SHW lines and their 74 tetraploid parents for their genetic diversity, breeding values and inter-genomic interactions for resistance to Fusarium head blight (FHB). The genetic diversity analysis was performed based on the population structure established using 4,674 and 3,330 polymorphic SNP markers among the SHW lines and tetraploid parents, respectively. The results showed that all T. carthlicum and most T. dicoccum accessions formed different clusters and subpopulations, respectively, whereas all the T. durum, T. polonicum, T. turgidum, and T. turanicum accessions were clustered together, suggesting that T. durum was more closely related to T. polonicum, T. turgidum, and T. turanicum than to T. dicoccum. The genetic diversity of the SHW lines mainly reflected that of the tetraploid parents. The SHW lines and their tetraploid parents were evaluated for reactions to FHB in two greenhouse seasons and at two field nurseries for 2 years. As expected, most of the SHW lines were more resistant than their tetraploid parents in all environments. The FHB severities of the SHW lines varied greatly depending on the Ae. tauschii and tetraploid genotypes involved. Most of the SHW lines with a high level of FHB resistance were generally derived from the tetraploid accessions with a high level of FHB resistance. Among the 149 SHW lines, 140 were developed by using three Ae. tauschii accessions CIae 26, PI 268210, and RL 5286. These SHW lines showed FHB severities reduced by 21.7%, 17.3%, and 11.5%, respectively, with an average reduction of 18.3%, as compared to the tetraploid parents, suggesting that the D genome may play a major role in reducing disease severity in the SHW lines. Thirteen SHW lines consistently showed a high level of FHB resistance compared to the resistant check, Sumai 3, in each environment. These SHW lines will be useful for the development of FHB-resistant wheat germplasm and populations for discovery of novel FHB resistance genes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Genetic Diversity and Resistance to Fusarium Head Blight in Synthetic Hexaploid Wheat Derived From Aegilops tauschii and Diverse Triticum turgidum Subspecies

et al. 2018

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“…Resistance to FHB has been a major focus of wheat breeding efforts for many decades and has relied on diverse germplasm resources [31]. Sources of FHB resistance used in current wheat breeding programs can be traced to limited parents, including Sumai 3 and its derivatives, Wangshuibai and Wuhan 1 [6].…”

Section: Discussionmentioning

confidence: 99%

Molecular cytogenetic characterization of wheat–Elymus repens chromosomal translocation lines with resistance to Fusarium head blight and stripe rust

Gong

Zhu

et al. 2019

BMC Plant Biol

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BackgroundFusarium head blight (FHB) caused by the fungus Fusarium graminearum Schwabe and stripe rust caused by Puccinia striiformis f. sp. tritici are devastating diseases that affect wheat production worldwide. The use of disease-resistant genes and cultivars is the most effective means of reducing fungicide applications to combat these diseases. Elymus repens (2n = 6x = 42, StStStStHH) is a potentially useful germplasm of FHB and stripe rust resistance for wheat improvement.ResultsHere, we report the development and characterization of two wheat–E. repens lines derived from the progeny of common wheat–E. repens hybrids. Cytological studies indicated that the mean chromosome configuration of K15–1192-2 and K15–1194-2 at meiosis were 2n = 42 = 0.86 I + 17.46 II (ring) + 3.11 II (rod) and 2n = 42 = 2.45 I + 14.17 II (ring) + 5.50 II (rod) + 0.07 III, respectively. Genomic and fluorescence in situ hybridization karyotyping and simple sequence repeats markers revealed that K15–1192-2 was a wheat–E. repens 3D/?St double terminal chromosomal translocation line. Line K15–1194-2 was identified as harboring a pair of 7DS/?StL Robertsonian translocations and one 3D/?St double terminal translocational chromosome. Further analyses using specific expressed sequence tag-SSR markers confirmed that the wheat–E. repens translocations involved the 3St chromatin in both lines. Furthermore, compared with the wheat parent Chuannong16, K15–1192-2 and K15–1194-2 expressed high levels of resistance to FHB and stripe rust pathogens prevalent in China.ConclusionsThus, this study has determined that the chromosome 3St of E. repens harbors gene(s) highly resistant to FHB and stripe rust, and chromatin of 3St introgressed into wheat chromosomes completely presented the resistance, indicating the feasibility of using these translocation lines as novel material for breeding resistant wheat cultivars and alien gene mining.

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“… Brisco et al (2017) identified several A. tauschii accessions showing resistance to Fusarium Head Blight and studies reported in this topic ( Szabo-Hever et al ) have shown that A. tauschii accessions decreased disease severities by 18.3%, suggesting that either the D genome or the increased ploidy level could contribute to resistance in synthetic hexaploid lines.…”

Section: Identification Of Diversity In Traits For Wheat Improvementmentioning

confidence: 90%

Editorial: Aegilops: Promising Genesources to Improve Agronomical and Quality Traits of Wheat

et al. 2020

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Fusarium head blight resistance in Aegilops tauschii

Cited by 10 publications

References 17 publications

Genetic Diversity and Resistance to Fusarium Head Blight in Synthetic Hexaploid Wheat Derived From Aegilops tauschii and Diverse Triticum turgidum Subspecies

Genetic Diversity and Resistance to Fusarium Head Blight in Synthetic Hexaploid Wheat Derived From Aegilops tauschii and Diverse Triticum turgidum Subspecies

Molecular cytogenetic characterization of wheat–Elymus repens chromosomal translocation lines with resistance to Fusarium head blight and stripe rust

Editorial: Aegilops: Promising Genesources to Improve Agronomical and Quality Traits of Wheat

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