Mapping quantitative trait loci for resistance against Russian wheat aphid (Diuraphis noxia) in wheat (Triticum aestivum L.)

Diuraphis noxia (Russian wheat aphid, RWA), one of the most aggressive pests of wheat, has evolved several biotypes with virulence matching known Dn resistance genes. This paper was aimed at determining the location of plant-defence genes triggered by RWA in a set of doubled haploid (DH) lines obtained from the cross of winter wheat varieties ‘Spark’ and ‘Rialto’. Both parental lines, 110 DH and CItr2401 (a RWA-resistant line) were screened for antixenosis, tolerance and antibiotic mechanisms of resistance with a population of RWA collected in Argentina. Antixenosis was not significantly linked to any marker locus. Tolerance traits showed significant associations with several chromosomes. Quantitative trait loci (QTL) for the foliar area developed during infestation was significantly associated with marker loci Xpsp3103 on 4DS, and Xgdm3 on 5DS. QTL for chlorophyll content in the infested plants were significantly associated with the marker loci Xgwm533 on 3BS and Xpsp3094 on 7AL, and a QTL for the number of expanded leaves was associated with the marker loci Xwmc264 on 3AS and XwPt8836 on 4DS. QTL for most of the tolerance traits were significantly associated with the same chromosome intervals on chromosomes 4DS and 5DS. The 4DS QTL were linked to or had a pleiotropic effect on Rht-D1. Most of the antibiosis traits were significantly associated with the same marker loci on chromosomes 4A (XwPt7405), 1B (XwPt9032) and 5B (Xbarc109 and Xbarc74). Several novel genes conferring tolerance and antibiosis to RWA were identified and these could be transferred into wheat cultivars to enlarge the genetic base of defence against this aphid pest. These new genes can be designated as QDn.unlp genes, following the rules for gene nomenclature in wheat.

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Quantitative Trait Loci Controlling Light and Hormone Response in Two Accessions ofArabidopsis thaliana

Genetics ◽

10.1093/genetics/160.2.683 ◽

2002 ◽

Vol 160 (2) ◽

pp. 683-696 ◽

Cited By ~ 13

Author(s):

Justin O Borevitz ◽

Julin N Maloof ◽

Jason Lutes ◽

Tsegaye Dabi ◽

Joanna L Redfern ◽

...

Keyword(s):

Quantitative Trait Loci ◽

Quantitative Trait ◽

Natural Variation ◽

Red Light ◽

Light Response ◽

Environment Interaction ◽

Isogenic Line ◽

Hormone Response ◽

New Genes ◽

Trait Loci

AbstractWe have mapped quantitative trait loci (QTL) responsible for natural variation in light and hormone response between the Cape Verde Islands (Cvi) and Landsberg erecta (Ler) accessions of Arabidopsis thaliana using recombinant inbred lines (RILs). Hypocotyl length was measured in four light environments: white, blue, red, and far-red light and in the dark. In addition, white light plus gibberellin (GA) and dark plus the brassinosteroid biosynthesis inhibitor brassinazole (BRZ) were used to detect hormone effects. Twelve QTL were identified that map to loci not previously known to affect light response, as well as loci where candidate genes have been identified from known mutations. Some QTL act in all environments while others show genotype-by-environment interaction. A global threshold was established to identify a significant epistatic interaction between two loci that have few main effects of their own. LIGHT1, a major QTL, has been confirmed in a near isogenic line (NIL) and maps to a new locus with effects in all light environments. The erecta mutation can explain the effect of the HYP2 QTL in the blue, BRZ, and dark environments, but not in far-red. LIGHT2, also confirmed in an NIL, has effects in white and red light and shows interaction with GA. The phenotype and map position of LIGHT2 suggest the photoreceptor PHYB as a candidate gene. Natural variation in light and hormone response thus defines both new genes and known genes that control light response in wild accessions.

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Mapping quantitative trait loci associated with common bunt resistance in a spring wheat (Triticum aestivum L.) variety Lillian

Theoretical and Applied Genetics ◽

10.1007/s00122-019-03403-3 ◽

2019 ◽

Vol 132 (11) ◽

pp. 3023-3033 ◽

Cited By ~ 6

Author(s):

Firdissa E. Bokore ◽

Richard D. Cuthbert ◽

Ron E. Knox ◽

Arti Singh ◽

Heather L. Campbell ◽

...

Keyword(s):

Triticum Aestivum ◽

Quantitative Trait Loci ◽

Spring Wheat ◽

Quantitative Trait ◽

Triticum Aestivum L ◽

Common Bunt ◽

Trait Loci ◽

Bunt Resistance

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Power of Daughter and Granddaughter Designs for Determining Linkage Between Marker Loci and Quantitative Trait Loci in Dairy Cattle

Journal of Dairy Science ◽

10.3168/jds.s0022-0302(90)78938-2 ◽

1990 ◽

Vol 73 (9) ◽

pp. 2525-2537 ◽

Cited By ~ 234

Author(s):

J.I. Weller ◽

Y. Kashi ◽

M. Soller

Keyword(s):

Quantitative Trait Loci ◽

Dairy Cattle ◽

Quantitative Trait ◽

Trait Loci ◽

Marker Loci

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

Theoretical and Applied Genetics ◽

10.1007/s00122-002-1179-7 ◽

2003 ◽

Vol 106 (8) ◽

pp. 1379-1389 ◽

Cited By ~ 220

Author(s):

X. Q. Huang ◽

H. Cöster ◽

M. W. Ganal ◽

M. S. Röder

Keyword(s):

Triticum Aestivum ◽

Quantitative Trait Loci ◽

Qtl Analysis ◽

Quantitative Trait ◽

Triticum Aestivum L ◽

Wild Relatives ◽

Advanced Backcross ◽

Trait Loci

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Correction to: Dissection of two quantitative trait loci with pleiotropic effects on plant height and spike length linked in coupling phase on the short arm of chromosome 2D of common wheat (Triticum aestivum L.)

Theoretical and Applied Genetics ◽

10.1007/s00122-019-03420-2 ◽

2019 ◽

Vol 132 (11) ◽

pp. 3223-3223 ◽

Cited By ~ 1

Author(s):

Lingling Chai ◽

Zhaoyan Chen ◽

Ruolin Bian ◽

Huijie Zhai ◽

Xuejiao Cheng ◽

...

Keyword(s):

Triticum Aestivum ◽

Quantitative Trait Loci ◽

Plant Height ◽

Common Wheat ◽

Quantitative Trait ◽

Triticum Aestivum L ◽

Pleiotropic Effects ◽

Spike Length ◽

Coupling Phase ◽

Trait Loci

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Dissection of quantitative trait loci for root characters and day length sensitivity in SynOpDH wheat (Triticum aestivum L.) bi-parental mapping population

Plant Genetic Resources ◽

10.1017/s1479262120000192 ◽

2020 ◽

Vol 18 (3) ◽

pp. 130-142

Author(s):

Harun Bektas ◽

Christopher Earl Hohn ◽

John Giles Waines

Keyword(s):

Quantitative Trait Loci ◽

Quantitative Trait ◽

Mapping Population ◽

Biomass Accumulation ◽

Triticum Aestivum L ◽

Day Length ◽

Shoot Biomass ◽

Trait Loci ◽

Root And Shoot Biomass ◽

Homoeologous Chromosomes

AbstractThe genetics of the root system is still not dissected for wheat and lack of knowledge prohibits the use of marker-assisted selection in breeding. To understand the genetic mechanism of root development, Synthetic W7984 × Opata M85 doubled-haploid (SynOpDH) mapping population was evaluated for root and shoot characteristics in PVC tubes until maturity. Two major quantitative trait loci (QTLs) for total root biomass were detected on homoeologous chromosomes 2A and 2D with logarithm of the odds scores between 6.25–10.9 and 11.8–20.86, and total phenotypic effects between 12.7–17.7 and 26.6–40.04% in 2013 and 2014, respectively. There was a strong correlation between days to anthesis and root and shoot biomass accumulation (0.50–0.81). The QTL for biomass traits on chromosome 2D co-locates with QTL for days to anthesis. The effect of extended vegetative growth, caused by photoperiod sensitivity (Ppd) genes, on biomass accumulation was always hypothesized, this is the first study to genetically support this theory.

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Detection of quantitative trait loci for wheat (Triticum aestivum L.) heading and flowering date

The Journal of Agricultural Science ◽

10.1017/s0021859619000200 ◽

2019 ◽

Vol 157 (1) ◽

pp. 20-30

Author(s):

C. H. Zhao ◽

H. Sun ◽

C. Liu ◽

G. M. Yang ◽

X. J. Liu ◽

...

Keyword(s):

Quantitative Trait Loci ◽

Quantitative Trait ◽

Genetic Relationships ◽

Heading Date ◽

Female Parent ◽

Triticum Aestivum L ◽

Wheat Breeding ◽

Yield Potential ◽

Flowering Date ◽

Trait Loci

AbstractHeading date (HD) and flowering date (FD) are critical for yield potential and stability, so understanding their genetic foundation is of great significance in wheat breeding. Three related recombinant inbred line populations with a common female parent were developed to identify quantitative trait loci (QTL) for HD and FD in four environments. In total, 25 putative additive QTL and 20 pairwise epistatic effect QTL were detected in four environments. The additive QTL were distributed across 17 wheat chromosomes. Of these, QHd-1A, QHd-1D, QHd-2B, QHd-3B, QHd-4A, QHd-4B and QHd-6D were major and stable QTL for HD. QFd-1A, QFd-2B, QFd-4A and QFd-4B were major and stable QTL for FD. In addition, an epistatic interaction test showed that epistasis played important roles in controlling wheat HD and FD. Genetic relationships between HD/FD and five yield-related traits (YRTs) were characterized and ten QTL clusters (C1–C10) simultaneously controlling YRTs and HD/FD were identified. The present work laid a genetic foundation for improving yield potential in wheat molecular breeding programmes.

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