Aegilops

Kilian, Benjamin; Mammen, Kerstin; Millet, E.; Sharma, Rajiv; Graner, Andreas; Salamini, F.; Hammer, Karl; Özkan, Hakan

doi:10.1007/978-3-642-14228-4_1

Cited by 124 publications

(112 citation statements)

References 385 publications

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“…Ae. variabilis belongs to the tribe Triticeae and is readily crossable as a male parent to bread wheat (Coriton et al, 2009), confirming its potential as a source of resistance for wheat breeding (Rivoal et al, 2001;Kilian et al, 2011). CCN resistance in Ae.…”

Section: Introductionmentioning

confidence: 93%

Isolation and characterization of a candidate gene for resistance to cereal cyst nematode from Aegilops variabilis in China

Xu¹,

Li²,

Long³

et al. 2012

Afr. J. Biotechnol.

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Cereal cyst nematode (CCN) (Heterodera avenae Woll.) is one of the most economically damaging endoparasite pests of wheat worldwide. We isolated and characterized a novel cereal CCN resistance candidate gene, CreV8, from Aegilops variabilis (2n = 28, UUS v S v ). The gene was 3,568 bp long and showed high nucleotide similarity with the known nematode resistance genes Cre3, CreZ, and go35. CreV8 consisted of two exons, one intron and a complete ORF of 2,763 bp. The deduced peptide sequence consisted of 920 amino acid residues and shared 97.83% amino acid identity with Cre3. The sequence harbored a signal peptide domain, a nucleotide-binding ARC (NB-ARC) domain, and a leucine-rich repeat (LRR) domain, all of which are typical characteristics of resistance genes. We proposed the resistance mechanism of CreV8 based on functional analysis and predictions from its conserved domains and tertiary structure. Real-time polymerase chain reaction (PCR) showed that CreV8 was expressed in CCN-inoculated roots of resistant plants, and its expression levels were 2.80 and 27.45 times higher than that in the untreated control at 3 and 11 days post-inoculation, respectively. These results indicate that CreV8 belongs to the nucleotide binding site (NBS)-LRR resistance gene family and that it is a candidate CCN-resistance gene.

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Section: Introductionmentioning

confidence: 93%

Isolation and characterization of a candidate gene for resistance to cereal cyst nematode from Aegilops variabilis in China

Xu¹,

Li²,

Long³

et al. 2012

Afr. J. Biotechnol.

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“…Maxted et al 2008 ). -Aegilops (Kilian et al 2011 ), Secale , Hordeum and many other genera of the Hordeeae (formerly Triticeae) are increasingly being used for improving yield, adaptation and quality characters in wheat. The diagram (Fig.…”

Section: Inclusion Of Neglected and Underutilized Cultivated Plantsmentioning

confidence: 99%

Genetic Resources of Triticum

Hammer

Knüpffer

2015

Advances in Wheat Genetics: From Genome to Field

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The political framework and the development of molecular biology and electronic data management caused a general paradigm shift in plant genetic resources (PGR), exemplifi ed here for wheat. (1) In situ versus ex situ maintenance of PGR. Ex situ maintenance lost predominance. Wild wheats are effectively maintained in the wild; landraces do well on farm. New methods did not lead to the expected progress. (2) Inclusion of neglected and underutilized crop species. Some species are probably extinct in traditional cultivation areas, whereas landraces were recently found for others. Wild relatives have gained importance in wheat breeding: besides wild Triticum species, also Aegilops , Secale , Hordeum and other genera are used. × Triticosecale reached world importance; × Tritordeum will follow soon. (3) Methods of analysing diversity within and between taxa. New technology yields new insights in the structure and evolution of populations. (4) Genetic erosion is a problem, also inside genebanks. (5) Landraces show complex morphological diversity. Infraspecifi c classifi cation systems are useful for their characterization and handling, but less recognised by breeders. (6) Methods of evaluation. Molecular markers identify genetic differences on a fairly simple level without reference to ecological adaptation. (7) Genebanks should expand classical evaluation programmes. Pre-breeding will gain importance. (8) Storage and reproduction in genebanks is done effectively and cost-effi ciently under long-term conditions, but strategic concepts for reproduction are needed. Traditional methods are often neglected, and modern possibilities over-emphasized. Maintenance of landraces in genebanks and on farm poses challenges. PGR work is conservative. Landraces can be studied by traditional methods; molecular methods can resolve specifi c questions.

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“…speltoides serves as a source of biotic stress tolerance genes, which have already been transferred to wheat (Lr28,Lr35,Lr36,Lr47,Lr51,Sr32,Sr39,Pm12,Pm32,Gb5) (see Kilian et al 2011). Moreover, this species is a potential source of other important traits such as resistance against pests and diseases (Fusarium head blight, Hessian fly, Septoria tritici), grain hardness protein, heat tolerance and tolerance to manganese toxicity (see Kilian et al 2011). Ae.…”

Section: Introductionmentioning

confidence: 99%

“…Many resistance genes against pests and diseases have already been transferred from Ae. tauschii to wheat (see Schneider et al 2008;Kilian et al 2011) and accessions of Ae. tauschii are also attractive sources of adaptive traits, yield components, bread-making quality and abiotic stress tolerance (Fritz et al 1995;Cox et al 1990;Schachtman et al 1992;limin and Fowler 1993;Xiu-Jin et al 1997).…”

Section: Introductionmentioning

confidence: 99%

“…tauschii and T. urartu (Brenchley et al 2012;You et al 2011;ling et al 2013), thus facilitating SnP discovery, physical mapping and whole genome shotgun sequencing (Kumar et al 2012). However, the successful application of nGS technology for de novo sequencing in species with large and complex genomes may be problematic, as the high proportion of repetitive sequences (57, 61 and 57 % for the A u , S and D genomes, respectively, in diploid wheats) hampers the assembly of short nGS reads (Kilian et al 2011;Shangguan et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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