Identification of Aegilops ovata chromosomes added to the wheat (Triticum aestivum L.) genome

Landjeva, S.; Ganeva, G.

doi:10.1007/bf03543919

Cited by 7 publications

(4 citation statements)

References 10 publications

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“…1999). The spike of the addition line from which the substitution line originated had a lax base, compact top and short awns (Landjeva and Ganeva 1999), characteristic of the addition of 2M g to the CS background (Friebe et al. 1999).…”

Section: Discussionmentioning

confidence: 99%

“…2005). The trait ‘covered caryopsis’ was observed in the addition line (Landjeva and Ganeva 1999) and was inherited in the selfed progenies. However, Ae.…”

Section: Discussionmentioning

confidence: 99%

“…geniculata addition lines was produced by Friebe et al. (1999), and a few other addition lines were isolated by Landjeva and Ganeva (1999) and Stoilova and Spetsov (2006). Only the 5M g (5D) wheat‐ Ae.…”

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confidence: 99%

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Molecular cytogenetic identification of a wheat‐Aegilops geniculata Roth spontaneous chromosome substitution and its effects on the growth and physiological responses of seedlings to osmotic stress

Landjeva¹,

Kocheva²,

Karceva³

et al. 2011

Plant Breeding

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The karyotypic constitution of a wheat-Aegilops geniculata 2M g (2A) disomic substitution line, isolated from backcross progenies of a wheat-Ae. geniculata amphiploid, was determined using multicolour fluorescence in situ hybridization and genomic in situ hybridization. The ability of the 2M g chromosome to compensate for wheat chromosome 2A was studied in relation to phenotypic traits and the growth and physiological responses of seedlings to polyethylene glycol (PEG)-induced osmotic stress. Plants of the substitution line had altered spike and seed morphologies, increased tillering, moderately reduced productivity and maintained better seedling growth in stress conditions. PEG treatment caused severe stress, resulting in considerable water loss from the leaves. Under this stress, the substitution line retained better leaf water status and suffered less oxidative damage than the wheat parent, as indicated by higher relative water content and lower malondialdehyde accumulation. These changes were consistent with more sustained membrane stability in the substitution line, evidenced by the lower value of the membrane injury index and the less-prominent increase in ion efflux from the apoplast.

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Section: Discussionmentioning

confidence: 99%

“…2005). The trait ‘covered caryopsis’ was observed in the addition line (Landjeva and Ganeva 1999) and was inherited in the selfed progenies. However, Ae.…”

Section: Discussionmentioning

confidence: 99%

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Molecular cytogenetic identification of a wheat‐Aegilops geniculata Roth spontaneous chromosome substitution and its effects on the growth and physiological responses of seedlings to osmotic stress

Landjeva¹,

Kocheva²,

Karceva³

et al. 2011

Plant Breeding

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“…Aegilops spp. carry many resistance genes to biotic factors: rusts (Dhaliwal et al 2002 ), powdery mildew (Miranda et al 2007 ) and eyespot (Leonard et al 2008 ), and abiotic factors: drought (Baalbaki et al 2006 ) and salinity (Landjeva and Ganeva 1999 ). The goatgrass-rye amphiploids can be used as a “bridge” to transfer useful agronomic traits from Aegilops spp.…”

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confidence: 99%

Aegilops-Secale amphiploids: chromosome categorisation, pollen viability and identification of fungal disease resistance genes

et al. 2011

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The aim of this study was to assess the potential breeding value of goatgrass-rye amphiploids, which we are using as a “bridge” in a transfer of Aegilops chromatin (containing, e.g. leaf rust resistance genes) into triticale. We analysed the chromosomal constitution (by genomic in situ hybridisation, GISH), fertility (by pollen viability tests) and the presence of leaf rust and eyespot resistance genes (by molecular and endopeptidase assays) in a collection of 6× and 4× amphiploids originating from crosses between five Aegilops species and Secale cereale. In the five hexaploid amphiploids Aegilops kotschyi × Secale cereale (genome UUSSRR), Ae. variabilis × S. cereale (UUSSRR), Ae. biuncialis × S. cereale (UUMMRR; two lines) and Ae. ovata × S. cereale (UUMMRR), 28 Aegilops chromosomes were recognised, while in the Ae. tauschii × S. cereale amphiploid (4×; DDRR), only 14 such chromosomes were identified. In the materials, the number of rye chromosomes varied from 14 to 16. In one line of Ae. ovata × S. cereale, the U-R translocation was found. Pollen viability varied from 24.4 to 75.4%. The leaf rust resistance genes Lr22, Lr39 and Lr41 were identified in Ae. tauschii and the 4× amphiploid Ae. tauschii × S. cereale. For the first time, the leaf rust resistance gene Lr37 was found in Ae. kotschyi, Ae. ovata, Ae. biuncialis and amphiploids derived from those parental species. No eyespot resistance gene Pch1 was found in the amphiploids.

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Aegilops-rye amphiploids and substitution rye used for introgression of genetic material into rye (Secale cereale L.)

2010

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The valuable genes of Aegilops biuncialis, Ae. ovata, Ae. kotschyi, and Ae. variabilis were transferred to rye, by crossing Aegilops-rye amphiploids with tetraploid and diploid substitution rye. The C-banded karyotype of the BC1 and BC2 generations of amphiploids with 4x substitution rye and BC1 with 2x substitution rye showed great variation in chromosome number and composition. In the BC1 generation of amphiploids with 4x and 2x substitution rye, seed set success rate and germination rate varied depending on origin. However, plant sterility in all cross combinations of amphiploids with 4x and 2x substitution rye resulted in their elimination from further experiments in the BC3 and BC2 generations, respectively. In backcrosses of 4x substitution rye with amphiploids Ae. variabilis × rye 4x, fertile 4x rye plants containing Aegilops chromatin were produced in the BC2 generation.

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Identification of Aegilops ovata chromosomes added to the wheat (Triticum aestivum L.) genome

Cited by 7 publications

References 10 publications

Molecular cytogenetic identification of a wheat‐Aegilops geniculata Roth spontaneous chromosome substitution and its effects on the growth and physiological responses of seedlings to osmotic stress

Molecular cytogenetic identification of a wheat‐Aegilops geniculata Roth spontaneous chromosome substitution and its effects on the growth and physiological responses of seedlings to osmotic stress

Aegilops-Secale amphiploids: chromosome categorisation, pollen viability and identification of fungal disease resistance genes

Aegilops-rye amphiploids and substitution rye used for introgression of genetic material into rye (Secale cereale L.)

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