Mapping of a gene for leaf scald resistance in barley line ‘B87/14’ and validation of microsatellite and RFLP markers for marker‐assisted selection

Williams, Kristen J.; Bogacki, P.; Scott, Leon J; Karakousis, A.; Wallwork, H.

doi:10.1046/j.1439-0523.2001.00593.x

Cited by 17 publications

(10 citation statements)

References 18 publications

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“…Rhynchosporium secalis is a highly variable fungus which is able to overcome single resistance genes quickly (Williams et al 2001). Therefore, it is generally not considered worthwhile to base breeding programmes for Rhynchosporium resistance on single major genes (Jørgensen et al 1995;Tekauz 1991;Salamati and Tronsmo 1997).…”

Section: Diagnostic Molecular Markersmentioning

confidence: 99%

Fine mapping, physical mapping and development of diagnostic markers for the Rrs2 scald resistance gene in barley

et al. 2009

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Section: Diagnostic Molecular Markersmentioning

confidence: 99%

Fine mapping, physical mapping and development of diagnostic markers for the Rrs2 scald resistance gene in barley

et al. 2009

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Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

“…These markers may then be used to increase the efficiency of selective breeding programmes by an order of magnitude compared to traditional breeding programmes (Jones et al 2002), something already achieved with resistant crop plants produced using this type of marker-assisted selection (e.g. Williams et al 2001).In this study the underlying genetic basis for individual and population level differences in resistance was examined using 'Quantitative trait loci' (QTL) analysis. Linkage maps were used to systematically search for chromosomal regions with significant statistical associations with parasite resistance, within salmon families created using hybrid male parents produced from stocks divergent in their ability to resist Gyrodactylus salaris.…”

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confidence: 99%

Identification of genetic markers associated with Gyrodactylus salaris resistance in Atlantic salmon Salmo salar

Gilbey

Verspoor

Mo³

et al. 2006

Dis. Aquat. Org.

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Gyrodactylus salaris Malmberg, 1957 is a freshwater monogenean ectoparasite of salmonids, first recorded in Norway in 1975 and responsible for extensive epizootics in wild Atlantic salmon Salmo salar L. The susceptibility of different populations of Atlantic salmon to G. salaris infection differs markedly, with fish from the Baltic being characterised as relatively resistant whereas those from Norway or Scotland are known to be (extremely) susceptible. Resistance to Gyrodactylus infection in salmonids has been found to be heritable and a polygenic mechanism of control has been hypothesised. The current study utilises a 'Quantitative trait loci' (QTL) screening approach in order to identify molecular markers linked to QTL influencing G. salaris resistance in B1 backcrosses of Baltic and Scottish salmon. Infection patterns in these fish exhibited 3 distinct types; susceptible (exponential parasite growth), responding (parasite load builds before dropping) and resistant (parasite load never increases). B1 backcross fish were screened at 39 microsatellite markers and single marker-trait associations were examined using general linear modelling. We identified 10 genomic regions associated with heterogeneity in both innate and acquired resistance, explaining up to 27.3% of the total variation in parasite loads. We found that both innate and acquired parasite resistance in Atlantic salmon are under polygenic control, and that salmon would be well suited to a selection programme designed to quickly increase resistance to G. salaris in wild or farmed stocks. KEY WORDS: Gyrodactylus salaris · Atlantic salmon · Resistance · Linkage mapping · Quantitative trait loci Resale or republication not permitted without written consent of the publisherDis Aquat Org 71: [119][120][121][122][123][124][125][126][127][128][129] 2006 Western Atlantic Ocean, the Eastern Atlantic Ocean and the Baltic (Stahl 1987, Bakke et al. 1990. Within these groups the species comprise multiple, genetically differentiated and, to a large extent, reproductively isolated river populations (Stahl & Hindar 1988). There is virtually no migration of fish from the Baltic into the Eastern Atlantic, or vice versa (Christensen & Larsson 1979). Population level genetic heterogeneity in resistance within and between salmon populations may thus be important in determining whether an epizootic takes place in a particular river (Pickering 1987), and for the future development of stocks resistant to the parasite (Bakke et al. 1999).Most species of freshwater fish seem to be more susceptible to attack from parasites to which they have not been previously exposed (Dobson & May 1987, Bakke et al. 1990). Heterogeneity in susceptibility of different salmon stocks, and of individuals of the same stock, to Gyrodactylus salaris has been noted in a number of studies, with fish from the Baltic being less susceptible than those of the Eastern Atlantic (Bakke et al. 1990, Bakke & MacKenzie 1993, Jansen & Bakke 1993a,b, Rintamäki-Kinnunen & Valtonen 1996, Cable et al....

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“…It has been demonstrated that SSR markers possess a number of advantages over other types of molecular markers, such as codominance, highly polymorphisms, locus specificity, good reproducibility, and random distribution throughout the genome. In recent years, a large number of SSR markers in barley have been developed and extensively utilized in barley genomic mapping and markerassisted breeding (Liu et al 1996;Ramsay et al 2000;Varshney et al 2007;Williams et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Molecular diversity and association mapping of quantitative traits in Tibetan wild and worldwide originated barley (Hordeum vulgare L.) germplasm

et al. 2010

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Molecular diversity of 40 accessions of Tibetan wild barley (TB), 10 Syrian (SY), 72 North American (NA), 36 European (EU), 9 South American (SA) and 8 Australian (AU) varieties were characterized using multiple microsatellite loci. The 42 SSR primers amplified 278 alleles across the 175 barley accessions tested in the present study. The average gene diversity for the whole sample was 0.3387 whereas the mean value for the each population was as follows: TB = 0.3286, SY = 0.2474, EU = 0.299, AU = 0.2867, NA = 0.3138, SA = 0.2536. Clustering analysis based on Nei's original genetic distanceshowed that the EU and NA barley populations were grouped together. The TB population was well separated from the other 5 barley populations. Associations between microsatellite markers and 14 quantitative traits were also investigated. Significant associations were found for 18 microsatellite marker loci. The number of marker loci associated with each trait ranged from one (stem diameter, filled grains per plant, grain weight per plant, length of main spike and awn length) to seven (plant height). The percentage of the total variation explained by each marker ranged from 4.59% (HVM2 associated with plant height) to 17.48% (Bmac90 associated with density of main spike). This study provides candidate markers for further QTL mapping of these traits and for marker-assisted selection.

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Mapping of a gene for leaf scald resistance in barley line ‘B87/14’ and validation of microsatellite and RFLP markers for marker‐assisted selection

Cited by 17 publications

References 18 publications

Fine mapping, physical mapping and development of diagnostic markers for the Rrs2 scald resistance gene in barley

Fine mapping, physical mapping and development of diagnostic markers for the Rrs2 scald resistance gene in barley

Identification of genetic markers associated with Gyrodactylus salaris resistance in Atlantic salmon Salmo salar

Molecular diversity and association mapping of quantitative traits in Tibetan wild and worldwide originated barley (Hordeum vulgare L.) germplasm

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