Molecular Cytogenetic Characterization of two Triticum–Secale–Thinopyrum Trigeneric Hybrids Exhibiting Superior Resistance to Fusarium Head Blight, Leaf Rust, and Stem Rust Race Ug99

Dai, Yi; Duan, Yamei; Liu, Huiping; Chi, Dawn; Cao, Wenguang; Xue, Allen; Gao, Yong; Fedak, George; Chen, Jianmin

doi:10.3389/fpls.2017.00797

Cited by 10 publications

(13 citation statements)

References 59 publications

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“…Th. elongatum harbors many beneficial genes that protect against adverse conditions such as disease, cold, drought, and salinity, and thus represents a promising gene donor to improve tolerance to biotic or abiotic stresses in common wheat [37–39]. In the current study, we produced hybrid progenies by crossing a Triticum durum–Th.…”

Section: Discussionmentioning

confidence: 99%

Cytogenetics and stripe rust resistance of wheat–Thinopyrum elongatum hybrid derivatives

Long

et al. 2018

Mol Cytogenet

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BackgroundAmphidiploids generated by distant hybridization are commonly used as genetic bridge to transfer desirable genes from wild wheat species into cultivated wheat. This method is typically used to enhance the resistance of wheat to biotic or abiotic stresses, and to increase crop yield and quality. Tetraploid Thinopyrum elongatum exhibits strong adaptability, resistance to stripe rust and Fusarium head blight, and tolerance to salt, drought, and cold.ResultsIn the present study, we produced hybrid derivatives by crossing and backcrossing the Triticum durum–Th. elongatum partial amphidiploid (Trititrigia 8801, 2n = 6× = 42, AABBEE) with wheat cultivars common to the Sichuan Basin. By means of cytogenetic and disease resistance analyses, we identified progeny harboring alien chromosomes and measured their resistance to stripe rust. Hybrid progenies possessed chromosome numbers ranging from 40 to 47 (mean = 42.72), with 40.0% possessing 42 chromosomes. Genomic in situ hybridization revealed that the number of alien chromosomes ranged from 1 to 11. Out of the 50 of analyzed lines, five represented chromosome addition (2n = 44 = 42 W + 2E) and other five were chromosome substitution lines (2n = 42 = 40 W + 2E). Importantly, a single chromosome derived from wheat–Th. elongatum intergenomic Robertsonian translocations chromosome was occurred in 12 lines. Compared with the wheat parental cultivars (‘CN16’ and ‘SM482’), the majority (70%) of the derivative lines were highly resistant to strains of stripe rust pathogen known to be prevalent in China.ConclusionThe findings suggest that these hybrid-derivative lines with stripe rust resistance could potentially be used as germplasm sources for further wheat improvement.

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Section: Discussionmentioning

confidence: 99%

Cytogenetics and stripe rust resistance of wheat–Thinopyrum elongatum hybrid derivatives

Long

et al. 2018

Mol Cytogenet

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“…Dai et al . () developed two Triticum – Secale – Thinopyrum hexaploid lines that have defence genes to multiple diseases (FHB, stem rust race Ug99 and leaf rust).…”

Section: Host Resistance To Fusarium Infectionmentioning

confidence: 99%

Integrated control of fusarium head blight and deoxynivalenol mycotoxin in wheat

et al. 2017

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Fusarium head blight (FHB), a devastating disease that affects wheat, is caused by a complex of Fusarium species. The overall impact of Fusarium spp. in wheat production arises through the combination of FHB and mycotoxin infection of the grain harvested from infected wheat spikes. Spike infection occurs during opening of flowers and is favoured by high humidity or wet weather accompanied with warm temperatures. Available possibilities for controlling FHB include the use of cultural practices, fungicides and biological approaches. Three cultural practices are expected to be of prime importance in controlling FHB and the production of mycotoxins: soil preparation method (deep tillage), the choice of the preceding crop in the rotation and the selection of appropriate cultivar.

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“…intermedium, and tetraploid wheatgrass Th. junceiforme, have been shown to be highly resistant to FHB (Chen et al 2005;Becher et al 2013;Kalih et al 2014;Dai et al 2017). Additionally, some wheat-wild species, including accessions of the St genome of Th.…”

Section: Introductionmentioning

confidence: 99%

Molecular Cytogenetic Characterization and Fusarium Head Blight of Five Wheat Thinopyrum Intermedium Partial Amphiploids

Wang

Cheng

Shi

et al. 2020

Preprint

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Background: Partial amphiploids created by crossing octoploid tritelytrigia and Thinopyrum intermedium are important intermediates in wheat breeding because of their resistance to major wheat diseases. We examined the chromosome compositions of five wheat Th. intermedium partial amphiploids using GISH and multicolor FISH. Results: The result revealed that five lines had 10 14 J genome chromosomes from Th. intermedium and 42 common wheat chromosomes, using the J genomic DNA from Th. bessarabicum and the oligo probes pAs1 1 , pAs1 3 , AFA 4 , GAA ) 10, and pSc119.2 1 . Five lines resembled the parent Ganmai 8 but had better protein contents. P rotein contents of t wo lines HS2 2 and HS2 5 were up to more than 20%. Evaluation of Fusarium head blight (FHB) resistance revealed that the percent of symptomatic spikelets (PSS) of these lines were below 30%. Lines HS2 2, HS2 4, HS2 5, and HS2 16 were less than 20%. Line HS2 5 with 14 J genome chromosomes from Th. intermedium showed the best disease resistance, with PSS values of 10.8% and 16.6% in 2016 and 2017, respectively. Conclusions: New wheat Th. intermedium amphiploids with the J genome chromosomes were identified and can be considered as a valuable source of FHB resistance in wheat breeding.

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Molecular Cytogenetic Characterization of two Triticum–Secale–Thinopyrum Trigeneric Hybrids Exhibiting Superior Resistance to Fusarium Head Blight, Leaf Rust, and Stem Rust Race Ug99

Cited by 10 publications

References 59 publications

Cytogenetics and stripe rust resistance of wheat–Thinopyrum elongatum hybrid derivatives

Cytogenetics and stripe rust resistance of wheat–Thinopyrum elongatum hybrid derivatives

Integrated control of fusarium head blight and deoxynivalenol mycotoxin in wheat

Molecular Cytogenetic Characterization and Fusarium Head Blight of Five Wheat Thinopyrum Intermedium Partial Amphiploids

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