01793nas a2200229   4500008004100000022001400041245006400055210006400119260006100183300001200244490000800256520104000264100001701304700002501321700002601346700001701372700002001389700002001409700002101429700001801450856009501468       2005                        eng d  a0040-575200aMolecular mapping of stem and leaf rust resistance in wheat0 aMolecular mapping of stem and leaf rust resistance in wheat  a233 SPRING STREET, NEW YORK, NY 10013 USAbSPRINGERcSEP  a846-8500 v1113 a<p>Stem rust caused by Puccinia graminis f. sp. tritici Eriks and Henn and leaf rust caused by Puccinia triticina Rob. ex Desm. are major constraints to wheat production worldwide. In the present study, F-4-derived SSD population, developed from a cross between Australian cultivars `Schomburgk' and `Yarralinka', was used to identify molecular markers linked to rust resistance genes Lr3a and Sr22. A total of 1,330 RAPD and 100 ISSR primers and 33 SSR primer pairs selected on the basis of chromosomal locations of these genes were used. The ISSR marker UBC 840(540) was found to be linked with Lr3a in repulsion at a distance of 6.0 cM. Markers cfa2019 and cfa2123 flanked Sr22 at a distance of 5.9 cM (distal) and 6.0 cM (proximal), respectively. The use of these markers in combination would predict the presence or absence of Sr22 in breeding populations. A previously identified PCR-based diagnostic marker STS638 linked to Lr20 was validated in this population. This marker showed a recombination value of 7.1 cM with Lr20.</p>1 aKhan, R., R.1 aBariana, Harbans, S.1 aDholakia, Bhushan, B.1 aNaik, S., V.1 aLagu, Meena, D.1 aRathjen, A., J.1 aBhavani, Sridhar1 aGupta, V., S.  uhttps://library.ncl.res.in/content/molecular-mapping-stem-and-leaf-rust-resistance-wheat-002840nas a2200289   4500008004100000022001400041245008900055210006900144260007400213300001200287490000700299520182300306653002202129653003302151653001802184653002802202653003002230653002202260100002302282700002102305700002002326700002202346700002302368700001402391700002502405856012002430       2010                        eng d  a1380-374300aQTL mapping of multiple foliar disease and root-lesion nematode resistances in wheat0 aQTL mapping of multiple foliar disease and rootlesion nematode r  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcJUN  a107-1240 v263 a<p>A genetic linkage map, based on a cross between the synthetic hexaploid CPI133872 and the bread wheat cultivar Janz, was established using 111 F(1)-derived doubled haploid lines. The population was phenotyped in multiple years and/or locations for seven disease resistance traits, namely, Septoria tritici blotch (Mycosphaeralla graminicola), yellow leaf spot also known as tan spot (Pyrenophora tritici-repentis), stripe rust (Puccinia striiformis f. sp. tritici), leaf rust (Puccinia triticina), stem rust (Puccinia graminis f. sp. tritici) and two species of root-lesion nematode (Pratylenchyus thornei and P. neglectus). The DH population was also scored for coleoptile colour and the presence of the seedling leaf rust resistance gene Lr24. Implementation of a multiple-QTL model identified a tightly linked cluster of foliar disease resistance QTL in chromosome 3DL. Major QTL each for resistance to Septoria tritici blotch and yellow leaf spot were contributed by the synthetic hexaploid parent CPI133872 and linked in repulsion with the coincident Lr24/Sr24 locus carried by parent Janz. This is the first report of linked QTL for Septoria tritici blotch and yellow leaf spot contributed by the same parent. Additional QTL for yellow leaf spot were detected in 5AS and 5BL. Consistent QTL for stripe rust resistance were identified in chromosomes 1BL, 4BL and 7DS, with the QTL in 7DS corresponding to the Yr18/Lr34 region. Three major QTL for P. thornei resistance (2BS, 6DS, 6DL) and two for P. neglectus resistance (2BS, 6DS) were detected. The recombinants combining resistance to Septoria tritici blotch, yellow leaf spot, rust diseases and root-lesion nematodes from parents CPI133872 and Janz constitute valuable germplasm for the transfer of multiple disease resistance into new wheat cultivars.</p>10aPratylenchyus spp10aPyrenophora tritici-repentis10aRust diseases10aSeptoria tritici blotch10aSynthetic hexaploid wheat10aTriticum aestivum1 aZwart, Rebecca, S.1 aThompson, J., P.1 aMilgate, A., W.1 aBansal, Urmil, K.1 aWilliamson, P., M.1 aRaman, H.1 aBariana, Harbans, S.  uhttps://library.ncl.res.in/content/qtl-mapping-multiple-foliar-disease-and-root-lesion-nematode-resistances-wheat-002695nas a2200265   4500008004100000022001400041245011400055210006900169260007400238300001400312490000700326520177900333653002302112653001202135653001402147653000902161653001002170100002202180700002302202700002102225700001802246700001702264700002502281856012302306       2012                        eng d  a1380-374300aMicrosatellite mapping identifies TTKST-effective stem rust resistance gene in wheat cultivars VL404 and Janz0 aMicrosatellite mapping identifies TTKSTeffective stem rust resis  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcDEC  a1757-17650 v303 a<p>Wheat cultivar VL404 carries seedling resistance to Puccinia graminis f. sp. tritici pathotype TTKST. Monogenic segregation for seedling resistance was observed in a VL404/WL711 recombinant inbred line population and the resistance locus was temporarily designated SrVL. Bulked segregant analysis using Diversity Arrays Technology markers located SrVL on chromosome 2BL. Detailed simple sequence repeat mapping placed SrVL between gwm120 and wmc175, both at genetic distances of 3.3 cM. Based on adult plant responses of Janz and VL404 in India and Kenya, we expected these cultivars to carry the same gene against TTKST. A subset of Diamondbird/Janz doubled haploid (DH) population showed monogenic segregation, when tested against TTKST and the locus was temporarily named SrJNZ. SrVL-linked markers gwm120 and wmc175 flanked SrJNZ at a similar genetic distance, thereby confirming our hypothesis. Chromosome 2BL carries Sr9, Sr16 and Sr28. Sr9 is a multi-allelic locus and all known alleles of Sr9 and Sr16 are ineffective against TTKSK and its derivatives. A recombination value of 16.7 cM between Sr9g-linked stripe rust resistance gene Yr7 and SrJNZ in Diamondbird/Janz DH population suggested that SrJNZ is not an allele at the Sr9 locus. Based on comparison of published genetic distances between Lr13, Sr9, Sr28 and Sr16 with that observed in this study, we concluded SrVL and SrJNZ to be Sr28. This gene was contributed by a common parent Gabo, which also exhibited resistance against TTKST. Sr28-linked markers gwm120 and wmc175 confirmed the presence of this gene in a high proportion of Australian cultivars that showed stem rust resistance in Kenya. These markers can be used for marker-assisted pyramiding of Sr28 with other stem rust resistance genes.</p>10aDisease resistance10aMarkers10aStem rust10aUg9910aWheat1 aBansal, Urmil, K.1 aZwart, Rebecca, S.1 aBhavani, Sridhar1 aWanyera, Ruth1 aGupta, Vidya1 aBariana, Harbans, S.  uhttps://library.ncl.res.in/content/microsatellite-mapping-identifies-ttkst-effective-stem-rust-resistance-gene-wheat-0