Genetics of two mechanisms of resistance to Meloidogyne naasi (FRANKLIN) in an Aegilops variabilis Eig. accession

Yu, M.Q.; Jahier, Joseph; Person-Dedryver, Françoise

doi:10.1007/bf00025259

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…CreX and CreY were pyramided into a single bread wheat line from Ae. variabilis 23 – 25 . Development of wheat cultivars resistant against nematodes is a challenging task for breeders.…”

Section: Introductionmentioning

confidence: 99%

Identification of genomic regions associated with cereal cyst nematode (Heterodera avenae Woll.) resistance in spring and winter wheat

Chaturvedi

Pundir

Singh

et al. 2023

Sci Rep

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Cereal cyst nematode (CCN) is a major threat to cereal crop production globally including wheat (Triticum aestivum L.). In the present study, single-locus and multi-locus models of Genome-Wide Association Study (GWAS) were used to find marker trait associations (MTAs) against CCN (Heterodera avenae) in wheat. In total, 180 wheat accessions (100 spring and 80 winter types) were screened against H. avenae in two independent years (2018/2019 “Environment 1” and 2019/2020 “Environment 2”) under controlled conditions. A set of 12,908 SNP markers were used to perform the GWAS. Altogether, 11 significant MTAs, with threshold value of −log10 (p-values) ≥ 3.0, were detected using 180 wheat accessions under combined environment (CE). A novel MTA (wsnp_Ex_c53387_56641291) was detected under all environments (E1, E2 and CE) and considered to be stable MTA. Among the identified 11 MTAs, eight were novel and three were co-localized with previously known genes/QTLs/MTAs. In total, 13 putative candidate genes showing differential expression in roots, and known to be involved in plant defense mechanisms were reported. These MTAs could help us to identify resistance alleles from new sources, which could be used to identify wheat varieties with enhanced CCN resistance.

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“…CreX and CreY were pyramided into a single bread wheat line from Ae. variabilis 23 – 25 . Development of wheat cultivars resistant against nematodes is a challenging task for breeders.…”

Section: Introductionmentioning

confidence: 99%

Identification of genomic regions associated with cereal cyst nematode (Heterodera avenae Woll.) resistance in spring and winter wheat

Chaturvedi

Pundir

Singh

et al. 2023

Sci Rep

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“…Ae. variabilis also contains desirable traits for common wheat improvement, such as high concentrations of iron and zinc in the grain ( Neelam et al 2011 ), resistance to Meloidogyne naasi (root knot nematode) and Heterodera avenae (cereal cyst nematode) ( Barloy et al 2007 , Yu et al 1990 , 1992 ), powdery mildew ( Spetsov et al 1997 ), leaf rust ( Marais et al 2008 ), stripe rust ( Liu et al 2011 ), spot blotch, and Karnal bunt ( Mujeeb-Kazi et al 2007 ).…”

Section: Introductionmentioning

confidence: 99%

Cytological identification of an <i>Aegilops variabilis</i> chromosome carrying stripe rust resistance in wheat

Zhao

Ning

et al. 2016

Breed. Sci.

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Aegilops variabilis (UUSvSv), an important sources for wheat improvement, originated from chromosome doubling of a natural hybrid between Ae. umbellulata (UU) with Ae. longissima (SlSl). The Ae. variabilis karyotype was poorly characterized by fluorescent in situ hybridization (FISH). The FISH probe combination of pSc119.2, pTa71 and pTa-713 identified each of the 14 pairs of Ae. variabilis chromosomes. Our FISH ideogram was further used to detect an Ae. variabilis chromosome carrying stripe rust resistance in the background of wheat lines developed from crosses of the stripe rust susceptible bread wheat cultivar Yiyuan 2 with a resistant Ae. variabilis accession. Among the 15 resistant BC1F7 lines, three were 2Sv + 4Sv addition lines (2n = 46) and 12 were 2Sv(2B) or 2Sv(2D) substitution lines that were confirmed with SSR markers. SSR marker gwm148 can be used to trace 2Sv in common wheat background. Chromosome 2Sv probably carries gametocidal(Gc) gene(s) since cytological instability and chromosome structural variations, including non-homologous translocations, were observed in some lines with this chromosome. Due to the effects of photoperiod genes, substitution lines 2Sv(2D) and 2Sv(2B) exhibited late heading with 2Sv(2D) lines being later than 2Sv(2B) lines. 2Sv(2D) substitution lines were also taller and exhibited higher spikelet numbers and longer spikes.

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“…Two more genes, CreX and CreY transferred from Ae. variabilis into two bread wheat lines (Yu et al 1992;Jahier et al 1998) have been pyramided into a single bread wheat line (Barloy et al 2007) for improving resistance.…”

Section: Introductionmentioning

confidence: 99%

Molecular mapping of cereal cyst nematode resistance in Triticum monococcum L. and its transfer to the genetic background of cultivated wheat

et al. 2010

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Triticum monococcum, the diploid A genome species, harbours enormous variability for resistance to biotic stresses. A spring type T. monococcum acc. 14087 was found to be resistant to Heterodera avenae (cereal cyst nematode, CCN). A recombinant inbred line population (RIL) developed by crossing this accession with a CCN susceptible T. boeoticum acc. 5088 was used for studying the inheritance and map location of the CCN resistance. Based on composite interval mapping two QTL, one each on chromosome 1AS and 2AS, were detected. The QTL on 1A, designated as Qcre.pau-1A, appeared to be a major gene with 26% contribution to the overall phenotypic variance whereas the QTL on 2A designated as Qcre.pau-2A contributed 13% to total phenotypic variation. Qcre.pau-1A is novel, being the only CCN resistance gene mapped in any 'A' genome species and none of the other known genes have been mapped on chromosome 1A. The QTL Qcre.pau-2A might be allelic to Cre5, a CCN resistance gene transferred from Ae. ventricosa and mapped on 2AS. The Qcre.pau-1A was transferred to cultivated wheat using T. durum cv. PBW114 as the bridging species. Selected CCN resistant F 8 lines showed introgression for the molecular markers identified to be linked with CCN resistance locus Qcre.pau-1A. Thus, this gene alone could impart complete resistance against CCN. These introgression lines can be used for marker-assisted transfer of Qcre.pau-1A to elite wheat cultivars.

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Genetics of two mechanisms of resistance to Meloidogyne naasi (FRANKLIN) in an Aegilops variabilis Eig. accession

Cited by 6 publications

References 5 publications

Identification of genomic regions associated with cereal cyst nematode (Heterodera avenae Woll.) resistance in spring and winter wheat

Identification of genomic regions associated with cereal cyst nematode (Heterodera avenae Woll.) resistance in spring and winter wheat

Cytological identification of an <i>Aegilops variabilis</i> chromosome carrying stripe rust resistance in wheat

Molecular mapping of cereal cyst nematode resistance in Triticum monococcum L. and its transfer to the genetic background of cultivated wheat

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