Chromosomal location of genes for resistance to powdery mildew in common wheat (Triticum aestivum L. em Thell.). 9. Gene MlZec1 from the Triticum dicoccoides-derived wheat line Zecoi-1

Mohler, Volker; Zeller, F. J.; Wenzel, G.; Hsam, S. L. K.

doi:10.1007/s10681-005-1251-x

Cited by 72 publications

(32 citation statements)

References 36 publications

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“…Moseman et al (1984) tested 233 T. dicoccoides accessions, collected at 10 sites in Israel and elsewhere, and identiWed frequent resistance and predicted the likelihood of relatively large numbers of resistance genes that were diVerent from the catalogued genes in cultivated tetraploid wheat and in common wheat. Several resistance genes (Pm16,Pm26,Pm30,Pm36,and MlZec1) derived from wild emmer were identiWed and mapped using molecular markers (Reader and Miller 1991;Rong et al 2000;Liu et al 2002;Mohler et al 2005;Chen et al 2005;McIntosh et al 2007). Pm16, originally mapped on chromosome 4A by monosomic analysis (Reader and Miller 1991), was recently mapped on 5BS using SSR markers .…”

Section: Powdery Mildew Resistancementioning

confidence: 99%

Wild emmer: genetic resources, gene mapping and potential for wheat improvement

2008

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Wild emmer, Triticum dicoccoides, the progenitor of cultivated wheat, harbors rich genetic resources for wheat improvement. They include many agronomic traits such as abiotic stress tolerances (salt, drought and heat), biotic stress tolerances (powdery mildew, rusts, and Fusarium head blight), grain protein quality and quantity, and micronutrient concentrations (Zn, Fe, and Mn). In this review, we summarize (1) traits and controlling genes identiWed and mapped in T. dicoccoides; and (2) the genes transferred to cultivated wheat from T. dicoccoides. These genes, controlling important agronomic traits such as disease resistance, high protein and micronutrient content, should contribute to wheat production and food nutrition. However, most of the rich genetic reservoir in wild emmer remains untapped, highlighting the need for further exploration and utilization for long-term wheat breeding programs.

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Section: Powdery Mildew Resistancementioning

confidence: 99%

Wild emmer: genetic resources, gene mapping and potential for wheat improvement

2008

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“…Both Pm6 and Pm33 were located on chromosome 2BL. MlZec1, a dominant resistance gene derived from wild emmer, was mapped distally to SSR marker Xwmc356 in terminal bin 2BL 0.89-1.00 (Mohler et al 2005). Two recessive powdery mildew resistance genes, Pm26 and Pm42 from wild emmer were located on chromosome 2BS (Rong et al 2000;Hua et al 2009).…”

Section: Discussionmentioning

confidence: 99%

“…dicoccoides (2n = 4x = 28; genome AABB), the progenitor of cultivated tetraploid and hexaploid wheats, is rich in genetic diversity for resistances to powdery mildew (Moseman et al 1984). Several powdery mildew resistance genes, such as Pm16 (Reader and Miller 1991), Pm26 (Rong et al 2000), Pm30 (Liu et al 2002), MlZec1 (Mohler et al 2005), MlIW72 (Ji et al 2007), Pm36 (Blanco et al 2008), Pm41 (Li et al 2009), Pm42 (Hua et al 2009), PmG16 (Ben-David et al 2010, and Ml3D232 were identified in wild emmer, or transferred to cultivated wheat or cultivated wheat derivatives.…”

Section: Introductionmentioning

confidence: 99%

Identification and comparative mapping of a powdery mildew resistance gene derived from wild emmer (Triticum turgidum var. dicoccoides) on chromosome 2BS

et al. 2011

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Powdery mildew, caused by Blumeria graminis f. sp. tritici, is an important foliar disease of wheat worldwide. Wild emmer (Triticum turgidum var. dicoccoides) is a valuable genetic resource for improving disease resistance in common wheat. A powdery mildew resistance gene conferring resistance to B. graminis f. sp. tritici isolate E09 at the seedling and adult stages was identified in wild emmer accession IW170 introduced from Israel. An incomplete dominant gene, temporarily designated MlIW170, was responsible for the resistance. Through molecular marker and bulked segregant analyses of an F(2) population and F(3) families derived from a cross between susceptible durum wheat line 81086A and IW170, MlIW170 was located in the distal chromosome bin 2BS3-0.84-1.00 and flanked by SSR markers Xcfd238 and Xwmc243. MlIW170 co-segregated with Xcau516, an STS marker developed from RFLP marker Xwg516 that co-segregated with powdery mildew resistance gene Pm26 on 2BS. Four EST-STS markers, BE498358, BF201235, BQ160080, and BF146221, were integrated into the genetic linkage map of MlIW170. Three AFLP markers, XPaacMcac, XPagcMcta, XPaacMcag, and seven AFLP-derived SCAR markers, XcauG2, XcauG3, XcauG6, XcauG8, XcauG10, XcauG20, and XcauG25, were linked to MlIW170. XcauG3, a resistance gene analog (RGA)-like sequence, co-segregated with MlIW170. The non-glaucousness locus Iw1 was 18.77 cM distal to MlIW170. By comparative genomics of wheat-Brachypodium-rice genomic co-linearity, four EST-STS markers, CJ658408, CJ945509, BQ169830, CJ945085, and one STS marker XP2430, were developed and MlIW170 was mapped in an 2.69 cM interval that is co-linear with a 131 kb genomic region in Brachypodium and a 105 kb genomic region in rice. Four RGA-like sequences annotated in the orthologous Brachypodium genomic region could serve as chromosome landing target regions for map-based cloning of MlIW170.

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“…By pooling DNA from resistant and susceptible individuals many large-eVect disease and pests resistance genes have been found. In wheat, BSA was successfully applied using mostly RFLPs, RAPDs and AFLPs to tag resistance genes for cereal cyst nematode (Eastwood et al 1994), powdery mildew (Hartl et al 1995;Hu et al 1997;Huang et al 2000;Liu et al 2002a;Mohler et al 2005), leaf rust , Septoria tritici blotch (Adhikari et al 2004a, c), or SSRs to map resistance genes for yellow rust (Börner et al 2000;Ma et al 2001), powdery mildew (Chantret et al 2000;Huang et al 2000; and Septoria tritici blotch (McCartney et al 2003;Adhikari et al 2004b, c).…”

Section: Molecular Genetic Mappingmentioning

confidence: 99%

Molecular markers: actual and potential contributions to wheat genome characterization and breeding

2007

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The demands for increasing global crop production have prompted the development of new approaches relying on molecular marker technologies to investigate and improve the plant genome. The merits of molecular markers make them valuable tools in a range of research areas. This review describes novel approaches based on modern molecular marker technologies for characterization and utilization of genetic variation for wheat improvement. Large-scale genome characterization by DNA-Wngerprinting has revealed no declining trends in the molecular genetic diversity in wheat as a consequence of modern intensive breeding thus opposing the genetic 'erosion' hypothesis. A great number of important major genes and quantitative trait loci have been mapped with molecular markers. Marker-assisted selection based on a tight linkage between a marker allele and a gene(s) governing a qualitative or quantitative trait is gaining considerable importance as it facilitates and accelerates cultivar improvement through precise transfer of chromosome regions carrying the gene of interest. The implementations of molecular markers in wheat genotyping, mapping and breeding complemented by speciWc approaches associated with the complex polyploid nature of common wheat are analyzed and presented.

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Chromosomal location of genes for resistance to powdery mildew in common wheat (Triticum aestivum L. em Thell.). 9. Gene MlZec1 from the Triticum dicoccoides-derived wheat line Zecoi-1

Cited by 72 publications

References 36 publications

Wild emmer: genetic resources, gene mapping and potential for wheat improvement

Wild emmer: genetic resources, gene mapping and potential for wheat improvement

Identification and comparative mapping of a powdery mildew resistance gene derived from wild emmer (Triticum turgidum var. dicoccoides) on chromosome 2BS

Molecular markers: actual and potential contributions to wheat genome characterization and breeding

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