Stem and leaf rust resistance in wild relatives of wheat with D genome (Aegilops spp.)

Vikas, V. K.; Sivasamy, M.; Kumar, J.; Jayaprakash, P.; Kumar, Sundeep; Rangan, Parimalan; Kumar, Arun; Srinivasan, K.; Radhamani, J.; Jacob, Sherry Rachel; Yadav, Mahesh C.; Rani, Jyotisna; Bisht, I. S.; Bhandari, D. C.; Archak, Sunil; Dutta, M.; Tyagi, Rishi; Bansal, Kailash C.

doi:10.1007/s10722-014-0085-6

Cited by 15 publications

(10 citation statements)

References 46 publications

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“…Possibility of narrow stem rust pathotype range (predominantly 40A and 40–1) has earlier resulted in a similar high range of (80–90%) resistant genotypes in wild species of wheat having D genome [60] and cultivated species [61]. However, without a repeated experiment, the accessions remain to be potentially stem rust resistant accessions.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of 19,460 Wheat Accessions Conserved in the Indian National Genebank to Identify New Sources of Resistance to Rust and Spot Blotch Diseases

et al. 2016

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A comprehensive germplasm evaluation study of wheat accessions conserved in the Indian National Genebank was conducted to identify sources of rust and spot blotch resistance. Genebank accessions comprising three species of wheat–Triticum aestivum, T. durum and T. dicoccum were screened sequentially at multiple disease hotspots, during the 2011–14 crop seasons, carrying only resistant accessions to the next step of evaluation. Wheat accessions which were found to be resistant in the field were then assayed for seedling resistance and profiled using molecular markers. In the primary evaluation, 19,460 accessions were screened at Wellington (Tamil Nadu), a hotspot for wheat rusts. We identified 4925 accessions to be resistant and these were further evaluated at Gurdaspur (Punjab), a hotspot for stripe rust and at Cooch Behar (West Bengal), a hotspot for spot blotch. The second round evaluation identified 498 accessions potentially resistant to multiple rusts and 868 accessions potentially resistant to spot blotch. Evaluation of rust resistant accessions for seedling resistance against seven virulent pathotypes of three rusts under artificial epiphytotic conditions identified 137 accessions potentially resistant to multiple rusts. Molecular analysis to identify different combinations of genetic loci imparting resistance to leaf rust, stem rust, stripe rust and spot blotch using linked molecular markers, identified 45 wheat accessions containing known resistance genes against all three rusts as well as a QTL for spot blotch resistance. The resistant germplasm accessions, particularly against stripe rust, identified in this study can be excellent potential candidates to be employed for breeding resistance into the background of high yielding wheat cultivars through conventional or molecular breeding approaches, and are expected to contribute toward food security at national and global levels.

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Section: Discussionmentioning

confidence: 99%

Evaluation of 19,460 Wheat Accessions Conserved in the Indian National Genebank to Identify New Sources of Resistance to Rust and Spot Blotch Diseases

et al. 2016

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“…Aegilops species are distributed from Europe to western China in a species-specific manner (van Slageren, 1994), adapted to many different climatic zones including drought/heat environments, different disease hot spots and nutrient-poor areas. It has been reported that Aegilops possesses useful traits for wheat breeding (For review to see; Kilian et al, 2011) including drought tolerance (Damania et al, 1992; Waines et al, 1993; Rekika et al, 1998; Monneveux et al, 2000; Farooq and Azam, 2001), heat tolerance (Waines, 1994), salinity (Colmer et al, 2006), aluminum toxicity tolerance (Miller et al, 1995) and resistance to several pests and diseases such as rust (Mihova, 1988; Anikster et al, 2005; Liu et al, 2010; Rouse et al, 2011; Vikas et al, 2014; Huang S. et al, 2018; Olivera et al, 2018), powdery mildew (Lutz et al, 1994; Buloichik et al, 2008), Hessian fly (El Bouhssini et al, 2008), cereal aphid (Holubec and Havlıckova, 1994) and barley yellow dwarf virus (BYDV) (Makkouk et al, 1994). In addition, the species can adapt to low phosphorous environments (Liu et al, 2015) and can contribute to higher iron and zinc content in wheat grain (Rawat et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

An Update of Recent Use of Aegilops Species in Wheat Breeding

Kishii

2019

Front. Plant Sci.

111

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Aegilops species have significantly contributed to wheat breeding despite the difficulties involved in the handling of wild species, such as crossability and incompatibility. A number of biotic resistance genes have been identified and incorporated into wheat varieties from Aegilops species, and this genus is also contributing toward improvement of complex traits such as yield and abiotic tolerance for drought and heat. The D genome diploid species of Aegilops tauschii has been utilized most often in wheat breeding programs. Other Aegilops species are more difficult to utilize in the breeding because of lower meiotic recombination frequencies; generally they can be utilized only after extensive and time-consuming procedures in the form of translocation/introgression lines. After the emergence of Ug99 stem rust and wheat blast threats, Aegilops species gathered more attention as a form of new resistance sources. This article aims to update recent progress on Aegilops species, as well as to cover new topics around their use in wheat breeding.

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“…Useful traits such as tolerance to cold 13 and salt 14 , leaf and stem rust resistance 15 and resistance to cereal cyst and root-knot nematodes 16,17 also exist within of the allopolyploid Aegilops species containing a copy of the D genome: Ae. crassa 4x (2n = D 1 D 1 X cr X cr ), Ae.…”

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Production of synthetic wheat lines to exploit the genetic diversity of emmer wheat and D genome containing Aegilops species in wheat breeding

Mirzaghaderi

Abdolmalaki

Ebrahimzadegan

et al. 2020

Sci Rep

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Due to the accumulation of various useful traits over evolutionary time, emmer wheat (Triticum turgidum subsp. dicoccum and dicoccoides, 2n = 4x = 28; AABB), durum wheat (T. turgidum subsp. durum, 2n = 4x = 28; AABB), T. timopheevii (2n = 4x = 28; AAGG) and D genome containing Aegilops species offer excellent sources of novel variation for the improvement of bread wheat (T. aestivum L., AABBDD). Here, we made 192 different cross combinations between diverse genotypes of wheat and Aegilops species including emmer wheat × Ae. tauschii (2n = DD or DDDD), durum wheat × Ae. tauschii, T. timopheevii × Ae. tauschii, Ae. crassa × durum wheat, Ae. cylindrica × durum wheat and Ae. ventricosa × durum wheat in the field over three successive years. We successfully recovered 56 different synthetic hexaploid and octaploid F2 lines with AABBDD, AABBDDDD, AAGGDD, D1D1XcrXcrAABB, DcDcCcCcAABB and DvDvNvNvAABB genomes via in vitro rescue of F1 embryos and spontaneous production of F2 seeds on the Fl plants. Cytogenetic analysis of F2 lines showed that the produced synthetic wheat lines were generally promising stable amphiploids. Contribution of D genome bearing Aegilops and the less-investigated emmer wheat genotypes as parents in the crosses resulted in synthetic amphiploids which are a valuable resource for bread wheat breeding.

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Stem and leaf rust resistance in wild relatives of wheat with D genome (Aegilops spp.)

Cited by 15 publications

References 46 publications

Evaluation of 19,460 Wheat Accessions Conserved in the Indian National Genebank to Identify New Sources of Resistance to Rust and Spot Blotch Diseases

Evaluation of 19,460 Wheat Accessions Conserved in the Indian National Genebank to Identify New Sources of Resistance to Rust and Spot Blotch Diseases

An Update of Recent Use of Aegilops Species in Wheat Breeding

Production of synthetic wheat lines to exploit the genetic diversity of emmer wheat and D genome containing Aegilops species in wheat breeding

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