Chromosomal Locations of Genes for Stem Rust Resistance in Monogenic Lines Derived from Tetraploid Wheat Accession ST464

Klindworth, Daryl L.; Miller, James; Jin, Yue; Xu, Steven S.

doi:10.2135/cropsci2006.05.0345

Cited by 42 publications

(49 citation statements)

References 22 publications

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“…Since these lines or their derivatives were present in most of the lineages of durum wheat cultivars released from North Dakota after 1978 (Klindworth et al 2007), a large proportion of the ND germplasm is expected to carry the Sr13 gene, which is in general agreement with the high proportion of TTKSK resistant lines found among the North Dakota germplasm included in this study (70%).…”

Section: Characterization Of Germplasm With Sr13 Linked Markerssupporting

confidence: 83%

“…The Ethiopian land race ST464, and the domesticated emmer wheat (T. turgidum ssp. dicoccon L.) Khapli are the two major sources of Sr13 in durum (Knott 1962;Klindworth et al 2007). The Sr13 resistance gene from Khapli was transferred to the common wheat variety Khapstein from the cross Steinwedel x Khapli, and was subsequently mapped on the distal region of the long arm of chromosome 6A by McIntosh (1972).…”

Section: Introductionmentioning

confidence: 99%

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Genetic mapping of stem rust resistance gene Sr13 in tetraploid wheat (Triticum turgidum ssp. durum L.)

et al. 2010

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Wheat stem rust caused by Puccinia graminis f. sp. tritici, can cause significant yield losses. To combat the disease breeders have deployed resistance genes both individually and in combinations to increase resistance durability. A new race, TTKSK (Ug99), identified in Uganda in 1999, is virulent on most of the resistance genes currently deployed, and is rapidly spreading to other regions of the world. It is therefore important to identify, map, and deploy resistance genes that are still effective against TTKSK. One of these resistance genes, Sr13, was previously assigned to the long arm of chromosome 6A, but its precise map location was not known. In this study, the genome location of Sr13 was determined in four tetraploid wheat (T. turgidum ssp. durum) mapping populations involving the TTKSK resistant varieties Kronos, Kofa, Medora and Sceptre. Our results showed that resistance was linked to common molecular markers in all four populations, suggesting that these durum lines carry the same resistance gene. Based on its chromosome location and infection types against different races of stem rust, this gene is postulated to be Sr13. Sr13 was mapped within a 1.2 to 2.8 cM interval (depending on the mapping population) between EST markers CD926040 and BE471213, which corresponds to a 285-kb region in rice chromosome 2, and a 3.1-Mb region in Brachypodium chromosome 3. These maps will be the foundation for developing high-density maps, identifying diagnostic markers, and positional cloning of Sr13.

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Section: Characterization Of Germplasm With Sr13 Linked Markerssupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Genetic mapping of stem rust resistance gene Sr13 in tetraploid wheat (Triticum turgidum ssp. durum L.)

et al. 2010

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“…In addition, Sr8b is likely present in durum genotypes ʽLeeds' (Luig ), ʽST 464‐A1' (Klindworth et al. ) and ʽArrivato' (Bhavani et al. ).…”

Section: Discussionmentioning

confidence: 99%

“…Genes Sr9e and Sr13 constitute major components of resistance in North American durum cultivars (Olivera et al 2012), and Sr9e and Sr12 are common in CIMMYT-derived durum lines (Singh et al 1992b). In addition, Sr8b is likely present in durum genotypes ʽLeeds' (Luig 1983), ʽST 464-A1' (Klindworth et al 2007) and ʽArrivato' (Bhavani et al 2008). The genes Sr8a, Sr8b, Sr9e, Sr9g, Sr12, Sr13, Sr17 and Sr23 were postulated in 28 of 105 tetraploid landraces from the Watkins collection studied using Australian and Indian Pgt pathotypes (Toor et al 2013).…”

Section: Stem Rust Resistancementioning

confidence: 99%

Sources of resistance to Indian pathotypes of Puccinia graminis tritici and P. triticina in durum wheat

et al. 2015

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Stem rust and leaf rust are important diseases affecting durum wheat production in India. Inheritance and extent of diversity in resistance were studied in five durum genotypes, viz. ʽB 662', ʽED 2398-A', ʽHG 110', ʽIWP 5019' and ʽLine 1172ʼ using Pgt pathotypes 40A and 117-6, and Pt pathotypes 12-2 and 104-2. F 2 and F 3 analyses showed that resistance was conferred by one or two genes in each line. In all, four genes for resistance to 40A, and eight each for pathotypes 117-6 and 12-2 were identified among the five genotypes, and three for resistance to 104-2 among B 662, ED 2398-A and IWP 5019 were indicated by tests of allelism. Although the gene identities are not known, at least some of them should be different from Sr2, Sr7b, Sr8a, Sr8b, Sr9e, Sr9g, Sr11, Sr12, Sr13, Sr14, Sr17, Sr23 and Sr28; and from Lr3, Lr14a, Lr23 and Lr27 + Lr31. These genotypes enrich the diversity of resistance to stem rust and leaf rust for durum wheat improvement.Key words: genetic diversity -Lr genes -resistance durability -Sr genes -Triticum turgidum ssp. durum India produces more than 90 million tonnes of wheat from an area of more than 25 million hectares, to which the contribution of durum wheat is about 5%. However, durum wheat has a special niche in the Indian wheat economy for at least two reasons: firstly, Indian durum is typically purchased by private traders at a premium price, mainly for processing high-value products; secondly, durum is preferred over bread wheat for several local food preparations. Durum and cultivated emmer are mainly grown in the central and southern parts, where leaf rust and stem rust are the major disease problems affecting wheat. Broadening the resistance base through the utilization of genetically diverse resistance sources is necessary to enhance the durability of resistance to meet ongoing threats from the continuously evolving rust pathogens. Relatively, little work has been done on the inheritance of rust resistance in durum, compared to bread wheat. However, studies conducted in different parts of the world indicate that durum generally shows resistance to Puccinia triticina (Pt) pathotypes virulent to bread wheat and vice versa

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“…Tritici, Puccinia spp. and Septori anodorum (Negassa, 1986), stem rust (Ug99 or TTKS race) (Klindworth et al, 2007) and drought tolerance (Mengistu et al, 2015). Despite such merits endowed in the farmer"s cultivars, their cultivation was progressively minimized with the advent of improved and genetically uniform modern varieties.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Yield and Yield Related Traits in Durum Wheat (Triticum Turgidum) Genotypes in Northern Ethiopia

Meles¹,

Hailekiros²

2019

Afr. J. Agric. Res.

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The main objective of this study was to evaluate 21 durum wheat genotypes for grain yield and agronomic traits under rain fed condition in three districts of Axum Agricultural Research Center, namely Hatsebo, Tahtay-Maichew and Ahferom during 2014 cropping season. Completely randomized block design with three replications was conducted for each location. The result of analysis of variance indicated that there was a significant difference among the genotypes for all the traits except harvest index. Thus, considerable variation was recorded among durum wheat genotypes. However, the effect of location on grain yield was non-significant. Among the genotypes, the highest grain yield was obtained from genotype 34thIDONMD/134/off2011 (2.39 t ha -1 ) across all environments. High value of genotypic coefficient of variation (GCV) was calculated for panicle length, biomass yield, grain yield and harvest index both at Hatsebo and Tahtay-Maichew. However, at Ahferom, medium GCV was observed for these traits, which might be due to terminal moisture stress during the cropping season. High genotypic coefficient of variation, heritability and genetic advance as percent of mean were found in panicle length, biomass yield, grain yield and harvest index at Hatsebo and Tahtay-Maichew. This indicated that these characters could be useful basis of selection. The association of grin yield was positive and significant with harvest index (0.67), days to maturity (0.25), days to heading (0.22) and biomass yield (0.2), however the association between biomass yield and harvest index was negative (-0.54).

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Chromosomal Locations of Genes for Stem Rust Resistance in Monogenic Lines Derived from Tetraploid Wheat Accession ST464

Cited by 42 publications

References 22 publications

Genetic mapping of stem rust resistance gene Sr13 in tetraploid wheat (Triticum turgidum ssp. durum L.)

Genetic mapping of stem rust resistance gene Sr13 in tetraploid wheat (Triticum turgidum ssp. durum L.)

Sources of resistance to Indian pathotypes of Puccinia graminis tritici and P. triticina in durum wheat

Assessment of Yield and Yield Related Traits in Durum Wheat (Triticum Turgidum) Genotypes in Northern Ethiopia

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