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Table 1 Genetic variants associated with human bitter taste perception

From: Bivariate genome-wide association analysis strengthens the role of bitter receptor clusters on chromosomes 7 and 12 in human bitter taste

Trait 1

SNP

Chr:Position

A1/A2

MAF

β

SE

r2

P

Trait 2

Quinine

Caffeine

SOA

DB

P_bivariate

Quinine

rs10772420

12:11174276

G/A

0.469

-0.337

0.034

5.67%

7.8e-23*

-

4.8e-65*

1.8e-24*

6.4e-26*

Caffeine

rs2597979 †

12:11189966

G/C

0.163

0.264

0.048

1.91%

4.2e-8

8.4e-24*

-

2.8e-10*

4.5e-11*

SOA

rs67487380

12:11194384

A/G

0.275

-0.202

0.040

1.63%

3.8e-7

5.4e-13*

4.5e-8

-

2.4e-6

DB

rs10261515

7:141398707

G/A

0.491

-0.136

0.037

0.93%

2.5e-4

3.1e-8

4.0e-6

5.6e-4

-

PROP solution

rs10246939

7:141672604

C/T

0.443

0.968

0.028

46.20%

2.8e-199*

    

PROP paper

rs10246939

7:141672604

C/T

0.441

0.534

0.032

14.08%a

5.4e-59*

    

PROP paper

rs6761655 ‡

2:218218646

G/A

0.186

-0.246

0.044

1.83%

2.7e-8

    
  1. We report the top SNP from the peak association. SNPs that were not identified in our previous GWAS are shown in italics. Allele frequency and effect sizes are reported with reference to allele A1. Base-pair position is based on GRCh37; A1/A2, minor/major allele; MAF, minor allele frequency; β, the effect size; SE, standard error of the β; r2, percent variance of the trait accounted for by the SNP; P, P-value from the univariate association analysis of trait 1; P_bivariate, P-value from the bivariate association analysis of traits 1 and 2; SOA, sucrose octaacetate; DB, denatonium benzoate; bold, P < genome-wide significance threshold of 5.0e-8; *, P < corrected significance threshold of 1.0e-8; †, an independent replication; ‡, no evidence of replication. See Additional files for the full list of SNPs (Additional file 1: Table S1, Additional file 2: Table S2, Additional file 3: Table S3, Additional file 4: Table S4, Additional file 5: Table S5, Additional file 6: Table S6, Additional file 7: Table S7)
  2. ars10246939 accounted only a third of the variance in PROP paper compared to PROP solution. This was partly due to the lower heritability of PROP paper (h2 = 0.40) compared to PROP solution (h2 = 0.71, Additional file 8: Table S8)