Differential Suppression of Stripe Rust Resistance in Synthetic Wheat Hexaploids Derived fromTriticum turgidumsubsp.dicoccoidesandAegilops squarrosa

Kema, G.H.J.; Lange, W.; Silfhout, C.H. van

doi:10.1094/phyto-85-425

Cited by 77 publications

(43 citation statements)

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“…The high level of susceptibility to PHS in Janz and at the same time the proven expression of PHS resistance associated with some of its genomic regions in SBLs is in agreement with the expressionsuppression phenomenon sometimes observed in wheat, especially in relation to the D-genome, in which gene(s) express in synthetic hexaploids only when the corresponding repressor is absent (Eastwood 1995;Kema et al 1995;Imtiaz et al 2003).…”

Section: Qtl Controlling Seed Dormancy and Phs In Wheatsupporting

confidence: 81%

“…However, this study clearly demonstrated that Altar84, the A-and B-genome donor in Syn37, carries QTL QPhs.dpivic-4A.1 and QPhs.dpivic-4A.2 for PHS resistance. Although modification in the expression of traits when transferred from the diploid to a higher ploidy level has been reported (Kema et al 1995;Ma et al 1995), full expression of PHS resistance was observed in SBLs in the current study (Table 1). Therefore, SBLs proved to be an effective tool to capture the full expression of a trait from its constitutive relatives to enhance germplasm, while characterizing and pyramiding QTL at the same time.…”

Section: Qtl Controlling Seed Dormancy and Phs In Wheatcontrasting

confidence: 47%

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Characterization of Quantitative Trait Loci Controlling Genetic Variation for Preharvest Sprouting in Synthetic Backcross-Derived Wheat Lines

Ogbonnaya²,

et al. 2008

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Aegilops tauschii, the wild relative of wheat, has stronger seed dormancy, a major component of preharvest sprouting resistance (PHSR), than bread wheat. A diploid Ae. tauschii accession (AUS18836) and a tetraploid (Triticum turgidum L. ssp. durum var. Altar84) wheat were used to construct a synthetic wheat (Syn37). The genetic architecture of PHS was investigated in 271 BC 1 F 7 synthetic backcross lines (SBLs) derived from Syn37/2*Janz (resistant/susceptible). The SBLs were evaluated in three environments over 2 years and PHS was assessed by way of three measures: the germination index (GI), which measures grain dormancy, the whole spike assay (SI), which takes into account all spike morphology, and counted visually sprouted seeds out of 200 (VI). Grain color was measured using both Chroma Meter-and NaOH-based approaches. QTL for PHSR and grain color were mapped and their additive and epistatic effects as well as their interactions with environment were estimated by a mixed linear-model approach. Single-locus analysis following composite interval mapping revealed four QTL for GI, two QTL for SI, and four QTL for VI on chromosomes 3DL and 4AL. The locus QPhs.dpiv-3D.1 on chromosome 3DL was tightly linked to the red grain color (RGC) at a distance of 5 cM. The other locus on chromosome 3D, ''QPhs.dpiv-3D.2'' was independent of RGC locus. Two-locus analysis detected nine QTL with main effects and 18 additive 3 additive interactions for GI, SI, and VI. Two of the nine main effects QTL and two epistatic QTL showed significant interactions with environments. Both additive and epistatic effects contributed to phenotypic variance in PHSR and the identified markers are potential candidates for marker-assisted selection of favorable alleles at multiple loci. SBLs derived from Ae. tauschii proved to be a promising tool to dissect, introgress, and pyramid different PHSR genes into adapted wheat genetic backgrounds. The enhanced expression of PHS resistance in SBLs enabled us to develop white PHS-resistant wheat germplasm from the red-grained Ae. tauschii accession.

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Section: Qtl Controlling Seed Dormancy and Phs In Wheatsupporting

confidence: 81%

Section: Qtl Controlling Seed Dormancy and Phs In Wheatcontrasting

confidence: 47%

Characterization of Quantitative Trait Loci Controlling Genetic Variation for Preharvest Sprouting in Synthetic Backcross-Derived Wheat Lines

Ogbonnaya²,

et al. 2008

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“…In the transfer of leaf rust, stem rust and stripe rust resistance genes from alien species (e.g. Aegilops squaT-rosa, Triticum dicoccoides) to common wheat Kerber & Green (1980), Bai & Knott (1992), Kema et a!. (1995) and Ma et a!.…”

Section: Resultsmentioning

confidence: 99%

Suppression of powdery mildew resistance gene Pm8 in Triticum aestivum L. (common wheat) cultivars carrying wheat-rye tranlocation T1BL·1RS

et al. 1996

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Disease response pattern of 127 T1B1RS translocation and substitution wheat cultivars, possessing powdery mildew resistance gene Pm8 and leaf rust resistance gene Lr26 located on rye chromosome arm iRS, revealed that sixteen of these cultivars express Lr26, but not concomitant Pm8 resistance. The mode of inheritance studied in the F1, F2 and F3 generations, and involving hybrids of cultivars Agra, Florida, Olymp, Sabina and Tjelvar not expressing Pm8 resistance indicated inhibition of resistance gene Pm8 by a dominant suppressor.

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“…Cluster 2: 22,7,30,21,23,19,27 Cluster 3: 17,12,8,5,4,24,11,28,16,14,15,6,1,9 Abb Auf Grund umfangreicher botanischer Untersuchungen gliederte Rechinger (Rechinger und Rechinger-Moser 1951;Rechinger 1943Rechinger , 1950 (Christodoulakis 1996a(Christodoulakis ,1996b (Bai und Knott 1992), Gelbrost (Kema et al 1995;Ma et al 1995) und Mehltau (Hanušova et al 1996) nachgewiesen werden.…”

Section: Bedeutung Und Nutzung Pflanzengenetischer Ressourcen In Der unclassified

New floristic records, confirmations and other phytogeographical notes from Crete (Greece)

Bergmeier¹

2011

Willdenowia

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Differential Suppression of Stripe Rust Resistance in Synthetic Wheat Hexaploids Derived fromTriticum turgidumsubsp.dicoccoidesandAegilops squarrosa

Cited by 77 publications

References 0 publications

Characterization of Quantitative Trait Loci Controlling Genetic Variation for Preharvest Sprouting in Synthetic Backcross-Derived Wheat Lines

Characterization of Quantitative Trait Loci Controlling Genetic Variation for Preharvest Sprouting in Synthetic Backcross-Derived Wheat Lines

Suppression of powdery mildew resistance gene Pm8 in Triticum aestivum L. (common wheat) cultivars carrying wheat-rye tranlocation T1BL·1RS

New floristic records, confirmations and other phytogeographical notes from Crete (Greece)

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