View Full Table | Close Full ViewTable 1.

Mean, standard deviation, and correlation of grain quality traits across sorghum accessions. The number of accessions used was 247 for kernel hardness (KH), kernel weight (KW), and kernel diameter (KD) and 274 for acid detergent fiber (ADF), Ca, crude protein (CP), fat, P, starch, and total digestible nutrients (TDN).

 
Correlation (r)
Traits Mean SD KH KW KD ADF Ca CP Fat P Starch TDN
KH 78.15 18.97
KW 24.40 5.20 −0.32***
KD 1.70 0.38 −0.33*** 0.91***
ADF 4.81 0.91 −0.18** −0.07 −0.08
Ca 0.06 0.01 0.23*** −0.07 −0.12 0.21***
CP 13.85 1.67 0.18** 0.13 0.05 0.43*** 0.31***
Fat 3.25 0.41 0.33*** −0.22*** −0.24*** 0.05 0.52*** −0.05
P 0.45 0.05 0.23*** 0.04 −0.04 0.28*** 0.33*** 0.75*** 0.20***
Starch 69.26 2.44 −0.09 0.02 0.10 −0.68*** −0.31*** −0.75*** −0.25*** −0.68***
TDN 84.84 1.40 −0.16** 0.07 0.08 −0.99*** −0.21*** −0.43*** −0.05 −0.28*** 0.67***
**Significant at the 0.01 probability level.
***Significant at the 0.001 probability level.



View Full Table | Close Full ViewTable 2.

Significant single nucleotide polymorphisms (SNPs) in candidate genes associated with grain quality traits.

 
SNP Locus and/or gene Chromosome Position† (bp) MAF‡ Trait§ p-value (best model) RLR2¶ (SNP) Predicted gene function
SB00214.1 pSB1700 3 60,981,646 0.17 KH 1.84 × 10−04 0.10 Hypothetical protein
SB00214.2 pSB1700 3 69,011,869 0.17 KH 1.84 × 10−04 0.10 Hypothetical protein
SB00116.3 SSIIa 10 8,211,818 0.28 KH 7.94 × 10−04 0.08 Starch synthase IIa
SB00156.1 pSB0289 3 58,654,927 0.22 Ca 5.36 × 10−04 0.06 Serine/threonine-protein kinase
SB00054.1 PRC1044 6 59,450,034 0.36 Ca 9.04 × 10−04 0.06 Hypothetical protein
SB00068.1 pSB0140 6 52,406,868 0.07 P 5.83 × 10−04 0.05 Peptide transporter PTR2
SB00115.3 SSIIb 4 58,000,108 0.17 Starch 3.67 × 10−04 0.10 Starch synthase IIb
SB00086.1 pSB1120 3 45,665,466 0.31 Starch 6.19 × 10−04 0.09 3-ketoacyl-CoA synthase
Physical location of the SNP in the chromosome in sorghum genome browser v2.39 on Phytozome (http://www.phytozome.net/sorghum [accessed 4 Sept. 2012]; Goodstein et al., 2012).
MAF, minor allele frequency.
§KH, kernel hardness.
RLR2, likelihood ratio-based R2.