scholarly journals A complex network of additive and epistatic quantitative trait loci underlies natural variation of Arabidopsis thaliana quantitative disease resistance to Ralstonia solanacearum under heat stress

2020 ◽  
Vol 21 (11) ◽  
pp. 1405-1420
Author(s):  
Nathalie Aoun ◽  
Henri Desaint ◽  
Léa Boyrie ◽  
Maxime Bonhomme ◽  
Laurent Deslandes ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Heat Stress ◽  
Disease Resistance ◽  
Quantitative Trait Loci ◽  
Complex Network ◽  
Ralstonia Solanacearum ◽  
Quantitative Trait ◽  
Natural Variation ◽  
Quantitative Disease Resistance ◽  
Resistance To Ralstonia Solanacearum

scholarly journals Quantitative Trait Loci Analysis of Powdery Mildew Disease Resistance in the Arabidopsis thaliana Accession Kashmir-1

Genetics ◽  
2001 ◽  
Vol 158 (3) ◽  
pp. 1301-1309 ◽  
Author(s):  
Iain W Wilson ◽  
Céline L Schiff ◽  
Douglas E Hughes ◽  
Shauna C Somerville
Keyword(s):  
Arabidopsis Thaliana ◽  
Disease Resistance ◽  
Quantitative Trait Loci ◽  
Powdery Mildew ◽  
Quantitative Trait ◽  
Recombinant Inbred Lines ◽  
Trait Loci ◽  
Powdery Mildew Disease ◽  
Model Plant Arabidopsis Thaliana ◽  
Chromosome Iii

Abstract Powdery mildew diseases are economically important diseases, caused by obligate biotrophic fungi of the Erysiphales. To understand the complex inheritance of resistance to the powdery mildew disease in the model plant Arabidopsis thaliana, quantitative trait loci analysis was performed using a set of recombinant inbred lines derived from a cross between the resistant accession Kashmir-1 and the susceptible accession Columbia glabrous1. We identified and mapped three independent powdery mildew quantitative disease resistance loci, which act additively to confer disease resistance. The locus with the strongest effect on resistance was mapped to a 500-kbp interval on chromosome III.

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

Genetics ◽  
2002 ◽  
Vol 160 (2) ◽  
pp. 683-696 ◽  
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.

scholarly journals PSV-13 Genetic parameters and quantitative trait loci for heat stress related traits in sheep

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 163-164
Author(s):  
Devin R Jacobs ◽  
Claudia E Silvera-Rojas ◽  
Jennifer M Bormann ◽  
Terry A Gipson ◽  
Arthur L Goetsch ◽  
...  
Keyword(s):  
Heat Stress ◽  
Quantitative Trait Loci ◽  
Rectal Temperature ◽  
Quantitative Trait ◽  
Fixed Effects ◽  
Univariate Analysis ◽  
Average Daily Gain ◽  
The United States ◽  
Nucleotide Polymorphisms ◽  
Trait Loci

Abstract Greater selection emphasis has been placed on efficiency than on fitness in livestock populations over the last several decades. Heat stress is a concern in production systems due to the negative effects on production, reproduction, and immunity. The objective of the study was to estimate variance components and identify quantitative trait loci (QTL) for heat stress related traits in sheep. A total of 125 Dorper, Katahdin, and St. Croix ewes originating from four regions of the United States were selected for the experiment. Animals were separated into four trials due to facility limitations. Data were collected for each trial over four consecutive two-week periods in an environmentally controlled facility with targeted heat load index (HLI) for daytime/nighttime of 70/70, 85/77, 90/77, and 95/81. Body weight was collected three times per week and rectal temperature was collected weekly. Black globe temperature and humidity were measured every 15 minutes. Animals were genotyped using the Illumina OvineSNP50 BeadChip. After quality control, 49,396 effective single nucleotide polymorphisms were included in the univariate analysis performed with the BLUPF90 suite of programs. Fixed effects in the models included region of origin, breed, trial, and age as a covariate. Traits analyzed included rectal temperature at 95 HLI (RT95), feed intake at 95 HLI (FI95), and average daily gain for the period for HLI between 90 and 95 (ADG). Heritabilities for RT95, FI95, and ADG were 0.35, 0.10, and 0.10, respectively. Largest effect QTL were identified on chromosomes 23, 9, and 6 for RT95, chromosomes 9, 2, and 20 for FI95, and chromosomes 6, 1, and 5 for ADG. Many of the regions identified have also been associated with weight and carcass traits in other studies, but few had obvious connections to the heat stress related response. In conclusion, results suggest selection could improve heat tolerance in sheep.

scholarly journals Genetic analysis identifies quantitative trait loci controlling rosette mineral concentrations in Arabidopsis thaliana under drought

2009 ◽  
Vol 184 (1) ◽  
pp. 180-192 ◽  
Author(s):  
Artak Ghandilyan ◽  
Luis Barboza ◽  
Sébastien Tisné ◽  
Christine Granier ◽  
Matthieu Reymond ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Quantitative Trait Loci ◽  
Genetic Analysis ◽  
Quantitative Trait ◽  
Trait Loci ◽  
Mineral Concentrations

scholarly journals Variation in Seed Dormancy Quantitative Trait Loci in Arabidopsis thaliana Originating from One Site

PLoS ONE ◽  
2011 ◽  
Vol 6 (6) ◽  
pp. e20886 ◽  
Author(s):  
Rebecca A. Silady ◽  
Sigi Effgen ◽  
Maarten Koornneef ◽  
Matthieu Reymond
Keyword(s):  
Arabidopsis Thaliana ◽  
Quantitative Trait Loci ◽  
Seed Dormancy ◽  
Quantitative Trait ◽  
Trait Loci

scholarly journals Quantitative trait loci identified for blood chemistry components of an advanced intercross line of chickens under heat stress

BMC Genomics ◽  
2016 ◽  
Vol 17 (1) ◽  
Author(s):  
Angelica Van Goor ◽  
Christopher M. Ashwell ◽  
Michael E. Persia ◽  
Max F. Rothschild ◽  
Carl J. Schmidt ◽  
...  
Keyword(s):  
Heat Stress ◽  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Blood Chemistry ◽  
Advanced Intercross Line ◽  
Trait Loci
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