Chromosomal location of powdery mildew resistance genes in Triticum aestivum L. (common wheat). 2. Genes Pm2 and Pm19 from Aegilops squarrosa L.

Lutz, J.; Hsam, S. L. K.; Limpert, E.; Zeller, F. J.

doi:10.1038/hdy.1995.22

Cited by 68 publications

(31 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Wild emmer wheat, Triticum dicoccoides Korn (2n = 28, AABB) and diploid Aegilops tauschii (2n = 14, DD) are the tetraploid progenitor and the D-genome donor of cultivated hexaploid wheat, respectively (Kihara 1944). Many genes for resistance to leaf rust, strip rust, stem rust and powdery mildew have been transferred from relatives of wheat such as durum wheat and Aegilops tauschii into bread wheat (Knot 1989;Lutz et al 1995). For increasing yield, however, wild relatives were not employed as a potential source for favorable alleles to-date, since crosses were usually performed within the gene pool of high yielding varieties.…”

Section: Introductionmentioning

confidence: 98%

Advanced backcross QTL analysis for the identification of quantitative trait loci alleles from wild relatives of wheat (Triticum aestivum L.)

Cöster²,

et al. 2003

View full text Add to dashboard Cite

Advanced backcross QTL (AB-QTL) analysis was used to identify quantitative trait loci (QTLs) for yield and yield components in a BC(2)F(2) population derived from a cross between the German winter wheat variety 'Prinz' and the synthetic wheat line W-7984 developed by CIMMYT. Two hundred and ten microsatellite markers were employed to genotype 72 pre-selected BC(2)F(2) plants and phenotypic data were collected for five agronomic traits from corresponding BC(2)F(3) families that were grown at four locations in Germany. Using single-marker regression and interval mapping, a total of 40 putative QTLs derived from W-7984 were detected, of which 11 were for yield, 16 for yield components, eight for ear emergence time and five for plant height. For 24 (60.0%) of them, alleles from the synthetic wheat W-7984 were associated with a positive effect on agronomic traits, despite the fact that synthetic wheat was overall inferior with respect to agronomic appearance and performance. The present study indicated that favorable QTL alleles could be transferred from wild relatives of wheat into an elite wheat variety for improvement of quantitative trait loci like yield by the advanced backcross QTL strategy and molecular breeding. To our knowledge, the results presented here were the first report on AB-QTL analysis in wheat.

show abstract

Section: Introductionmentioning

confidence: 98%

Advanced backcross QTL analysis for the identification of quantitative trait loci alleles from wild relatives of wheat (Triticum aestivum L.)

Cöster²,

et al. 2003

View full text Add to dashboard Cite

show abstract

“…This hybridisation event can be repeated today by crossing tetraploid wheat (AABB) with T. tauschii (DD) to produce synthetic hexaploid wheat. These synthetic hexaploids have been used as an intermediate for transferring genes for biotic stresses, such as diseases (Kerber 1987;Lutz et al 1995;Ma et al 1995), and abiotic stresses, such as cold hardiness and salinity (Gorham et al 1987;Limin and Fowler 1993), from wild progenitors to cultivated hexaploid wheats.…”

Section: Introductionmentioning

confidence: 99%

Advanced backcross QTL analysis in progenies derived from a cross between a German elite winter wheat variety and a synthetic wheat (Triticum aestivumL.)

Huang

Kempf²,

Ganal³

et al. 2004

Theor Appl Genet

220

121

View full text Add to dashboard Cite

We report here the second advanced backcross quantitative trait locus (AB-QTL) analysis carried out in winter wheat. Seven agronomic traits were studied in a BC2F1 population derived from a cross between the German winter wheat variety Flair and the synthetic wheat line XX86 developed in Japan. We selected 111 BC2F1 lines and genotyped these with 197 microsatellite markers. Field data for seven agronomic traits were collected from corresponding BC2F3 families that were grown at up to six locations in Germany. QTL analyses for yield and yield components were performed using single-marker regression and interval mapping. A total of 57 putative QTLs derived from XX86 were detected, of which 24 (42.1%) were found to have a positive effect from the synthetic wheat XX86. These favourable QQTLs were mainly associated with thousand-grain weight and grain weight per ear. Many QTLs for correlated traits were mapped in similar chromosomal regions. The AB-QTL data obtained in the present study are discussed and compared with results from previous QTL analyses.

show abstract

“…Similarly, priority breeding objectives for European winter wheat breeding programs include resistance to powdery mildew, stripe rust, industrial quality and resistance to other biotic stresses (Karsai et al 2012). The genetic diversity present within synthetic hexaploids has been assessed for its resistance to Russian wheat aphid (Castro et al 2004, Sotelo et al 2009), green bug (Lage et al 2003, Castro et al 2004, and powdery mildew (Gill et al 1996, Lutz et al 1995, Miranda et al 2006). The diversity is expansive and highly pursued by global wheat researchers using conventional and spring wheat based alien genetic resources (Mujeeb-Kazi 2003, 2006.…”

Section: Discussionmentioning

confidence: 99%

Analysis of Genetic Diversity in Synthetic Wheat Assemblage (T. turgidum^|^times;Aegilops tauschii; 2n=6x=42; AABBDD) for Winter Wheat Breeding

et al. 2014

View full text Add to dashboard Cite

Summary An unconventional genetic resource for bread wheat improvement is the diploid D genome donor to bread wheat; Aegilops tauschii (2n=2x=14, DD). Bridge crossing the Triticum turgidum/Aegilops tauschii results in synthetic hexaploid (SH) wheats; the most common method of wheat improvement that efficiently utilizes the diversity of this diploid wheat progenitor of the primary gene pool. SH wheats exhibit spring or winter growth habits, depending on the parental durum germplasm. This study focuses on the molecular diversity among 58 winter synthetic hexaploid wheat (WSH) combinations that have been produced to facilitate winter wheat breeding programs. Genetic diversity and genome-wide linkage disequilibrium (LD) were investigated for all D-genome chromosomes using SSR markers. LD analysis based on 71 microsatellite loci represented a mean marker density of 7.1 cm. A total of 738 alleles ranging from 3 to 20 per locus were characterized in WSHs. The mean PIC and MI values were 0.61 and 3.41, ranging from 0.14 to 0.86 and 0.02 to 9.6, respectively. The analysis of molecular variance and Wright s fixation index further established significant genetic diversity among different clusters and durum groups leading to the conclusion that diversity within WSHs is well validated. The population structure also partially validated the cluster analysis by forming eight (K=6) sub-populations. The variable patterns of LD independent of the genetic distance (cm) in some cases provided critical information for these resynthesized winter wheat genetic resources for their future deployment and association mapping studies. Molecular analyses, thus, have established ample diversity that is present within these winter SHs and generated information for effectively introducing new diversity from these unique genetic resources into the prevalent winter wheat germplasm.

show abstract

Chromosomal location of powdery mildew resistance genes in Triticum aestivum L. (common wheat). 2. Genes Pm2 and Pm19 from Aegilops squarrosa L.

Cited by 68 publications

References 28 publications

Advanced backcross QTL analysis for the identification of quantitative trait loci alleles from wild relatives of wheat (Triticum aestivum L.)

Advanced backcross QTL analysis for the identification of quantitative trait loci alleles from wild relatives of wheat (Triticum aestivum L.)

Advanced backcross QTL analysis in progenies derived from a cross between a German elite winter wheat variety and a synthetic wheat (Triticum aestivumL.)

Analysis of Genetic Diversity in Synthetic Wheat Assemblage (T. turgidum^|^times;Aegilops tauschii; 2n=6x=42; AABBDD) for Winter Wheat Breeding

Contact Info

Product

Resources

About