scholarly journals Quantitative trait loci for rice blast resistance detected in a local rice breeding population by genome-wide association mapping

2015 ◽  
Vol 65 (5) ◽  
pp. 388-395 ◽  
Author(s):  
Hiroshi Shinada ◽  
Toshio Yamamoto ◽  
Hirokazu Sato ◽  
Eiji Yamamoto ◽  
Kiyosumi Hori ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Association Mapping ◽  
Quantitative Trait ◽  
Rice Blast ◽  
Blast Resistance ◽  
Breeding Population ◽  
Genome Wide Association ◽  
Rice Breeding ◽  
Rice Blast Resistance ◽  
Genome Wide

scholarly journals Genome-wide association mapping of growth dynamics detects time-specific and general quantitative trait loci

2015 ◽  
Vol 66 (18) ◽  
pp. 5567-5580 ◽  
Author(s):  
Johanna A. Bac-Molenaar ◽  
Dick Vreugdenhil ◽  
Christine Granier ◽  
Joost J.B. Keurentjes
Keyword(s):  
Quantitative Trait Loci ◽  
Association Mapping ◽  
Quantitative Trait ◽  
Growth Dynamics ◽  
Genome Wide Association ◽  
Genome Wide ◽  
Trait Loci ◽  
Time Specific

scholarly journals Functional Interactions Between Major Rice Blast Resistance Genes, Pi-ta and Pi-b, and Minor Blast Resistance Quantitative Trait Loci

2018 ◽  
Vol 108 (9) ◽  
pp. 1095-1103 ◽  
Author(s):  
Xinglong Chen ◽  
Yulin Jia ◽  
Melissa H. Jia ◽  
Shannon R. M. Pinson ◽  
Xueyan Wang ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Rice Blast ◽  
Blast Resistance ◽  
R Genes ◽  
Resistance Qtls ◽  
Single Nucleotide ◽  
Rice Blast Resistance ◽  
Trait Loci ◽  
Blast Resistance Genes

Major blast resistance (R) genes confer resistance in a gene-for-gene manner. However, little information is available on interactions between R genes. In this study, interactions between two rice blast R genes, Pi-ta and Pi-b, and other minor blast resistance quantitative trait loci (QTLs) were investigated in a recombinant inbred line (RIL) population comprising 243 RILs from a Cybonnet (CYBT) × Saber (SB) cross. CYBT has the R gene Pi-ta and SB has Pi-b. Ten differential isolates of four Magnaporthe oryzae races (IB-1, IB-17, IB-49, and IE-1K) were used to evaluate disease reactions of the 243 RILs under greenhouse conditions. Five resistance QTLs were mapped on chromosomes 2, 3, 8, 9, and 12 with a linkage map of 179 single nucleotide polymorphism markers. Among them, qBR12 (Q1), was mapped at the Pi-ta locus and accounted for 45.41% of phenotypic variation while qBR2 (Q2) was located at the Pi-b locus and accounted for 24.81% of disease reactions. The additive-by-additive epistatic interaction between Q1 (Pi-ta) and Q2 (Pi-b) was detected; they can enhance the disease resistance by an additive 0.93 using the 0 to 9 standard phenotyping method. These results suggest that Pi-ta interacts synergistically with Pi-b.

scholarly journals Identification of Quantitative Trait Loci for Related Traits of Stalk Lodging Resistance Using Genome-wide Association Studies in Maize (Zea mays L.)

2021 ◽  
Author(s):  
Lifen Wu ◽  
Yunxiao Zheng ◽  
Fuchao Jiao ◽  
Ming Wang ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Zea Mays ◽  
Quantitative Trait Loci ◽  
Association Mapping ◽  
Quantitative Trait ◽  
Genetic Basis ◽  
Genome Wide Association ◽  
Lodging Resistance ◽  
Mapping Panel ◽  
Genome Wide ◽  
Stalk Lodging

Abstract Background: Stalk lodging is one of the main factors affecting maize (Zea mays L.) yield and limiting mechanized harvesting. Developing maize varieties with high stalk lodging resistance requires exploring the genetic basis of lodging resistance-associated agronomic traits. Stalk strength is an important indicator to evaluate maize lodging and can be evaluated by measuring stalk rind penetrometer resistance (RPR) and stalk buckling strength (SBS). And morphological traits of the stalk for the third internodes length (TIL), fourth internode length (FIL), third internode diameter (TID), and the fourth internode diameter (FID) traits are associated with stalk lodging resistance.Results: In this study, 248 genome-wide association study (GWAS) panel with 83,057 single nucleotide polymorphisms (SNPs) were used to detect the quantitative trait loci (QTLs) for six stalk lodging resistance-related traits. The heritability of all traits ranged from 0.59 to 0.72 in the association mapping panel. A total of 85 significant SNPs were identified for the association mapping panel using best linear unbiased prediction (BLUP) values of all traits. Additionally, five candidate genes were associated with stalk strength traits, which were either directly or indirectly associated with cell wall components. Conclusions: These findings contribute to our understanding of the genetic basis of maize stalk lodging and provide valuable theoretical guidance for lodging resistance in maize breeding in the future.

scholarly journals A Genome-Wide Association Study Identifies Protein Quantitative Trait Loci (pQTLs)

PLoS Genetics ◽  
2008 ◽  
Vol 4 (5) ◽  
pp. e1000072 ◽  
Author(s):  
David Melzer ◽  
John R. B. Perry ◽  
Dena Hernandez ◽  
Anna-Maria Corsi ◽  
Kara Stevens ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Association Study ◽  
Quantitative Trait ◽  
Genome Wide Association Study ◽  
Genome Wide Association ◽  
Genome Wide ◽  
A Genome ◽  
Trait Loci
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