Skip to main content
. 2018 Jul 18;59(10):1919–1930. doi: 10.1093/pcp/pcy141

Table 2.

Summary of 19 maize root trait QTLs and GWAS studies that have been published since or were not included in Hund et al. (2011)

Trait group Trait measurement No. of traits Population Pop size Rep� Repeat Plants per rep Time and/ or stage sampled No. of markers Map density Media and treatment H2 No. of QTLs Meta- QTLsa Reference
Nodal root anatomy Aerenchyma: visual score 1 B64�Z. nicaraguensis: F2 141 1 � 1 1 28 d V6 85 SSRs 17.2 cM Granular soil; GH NA 6 N Mano et al. (2007)
Z. nicaraguensis�Mi29: BC2F1 214 1 � 1 1 28 d V6 94 SSRs 10.2 cM Granular soil; GH NA 3 N Mano and Omori (2008)
Z. nicaraguensis�Mi29: BC4F1 123 1 � 1 1 28 d V6 156 SSRs + 38 Indels NA Granular soil; GH NA 2 N Mano and Omori (2009)
ROL: methylene blue + oxygen electrode 2 Z. nicaraguensis�Mi29: BC3F5 48 4 � 1 1 25 d 98 SSRs NA Hydroponics NA 1 N Watanabe et al. (2017)
RootScan: cross-sections 10 B73�Mo17 (IBM): RILs 200 3 � 1 1;3 30 d V6; 56 d V12 8,224 GBS-SNPs 0.7 cM Potting mix; field 0.47 to 0.78 1 N Burton et al. (2015)
Oh43�W64a (OhW): RILs 200 3 � 1 1 30 d V6 5,683 GBS-SNPs 0.6 cM Potting mix 0.47 to 0.78 5 N
NY821�H99 (NyH): RILs 176 3 � 1 1 30 d V6 5,320 GBS-SNPs 0.7 cM Potting mix 0.47 to 0.78 0 N
Nodal root Visual count 2 Huangzao 4� CML288: IF2 278 1 x 1 10 VT + 10 d 237 SSRs 12.3 cM Field NA 15 N Ku et al. (2012)
Huangzao 4�CML288: RILs 201 3 � 1 10 VT + 10 d 237 SSRs 8.33 cM Field NA 10 N
Visual count + weight 8 Yi17�Yi16: F2 276 1 � 1 1 R6 212 SSRs 7.35 cM Field 0.42 to 0.79 44 Y Gu et al. (2017)
Yi17�Yi16: F2:3 241 2 � 3 8 R6 212 SSRs 7.35 cM Field 0.40 to 0.66 49 Y
Visual count 9 Z. parviglumis�W22: BC2S3 866 1 � 4 10 VT per line 19,838 GBS-SNPs 39.6 kbp Field NA 133 N Zhang et al. (2018)
RSA WinRhizo + weight 7 NUEC2�NUEC4: DH 60 2 � 1 15-30 12 d 754 50k-SNPs NA Paper roll NA 30 Y Pestsova et al. (2016)
Root count + weight 9 Ye478�Wu312: F8 218 3 � 3 2 20 d V5/6 184 SSRs 11.3cM Hydroponics: HN + LN 0.36 to 0.69 134 Y Li et al. (2015)
Count + weight + WinRhizo 21 B73�Mo17 (IBM): RILs 200 3 � 1 1 30 d V6/7 8,224 GBS-SNPs 0.7 cM Potting mix 0.10 to 0.60 7 N Burton et al. (2014)
Oh43�W64a (OhW): RILs 200 3 � 1 1 30 d V6/7 5,683 GBS-SNPs 0.6 cM Potting mix 0.10 to 0.60 5 Y
NY821�H99 (NyH): RILs 176 3 � 1 1 30 d V6/7 5,320 GBS-SNPs 0.7 cM Potting mix 0.10 to 0.60 3 Y
WinRhizo + weight 6 Ye478�Wu312: F8 218 3 � 2 2–3 50 d V6; 80 d VT; 120 d R6 184 SSRs 11.3 cM Field 0.01 to 0.55 36 N Cai et al. (2012)
Ye478�Wu312: BC4F3 187 3 � 2 2–3 50 d V6; 80 d VT; 120 d R6 143 SSRs 11.3 cM Field 0.01 to 0.55 36 N
WinRhizo + weight + length 8 Ye478�Wu312: F8 218 2;2;1 6; 12; 17 12 d; 8 d; 10 d 184 SSRs 11.3cM Hydroponics; paper roll; vermiculite 0.52 to 0.83 46 Y Liu et al. (2017)
Ye478�Wu312: BC4F3 187 2;2;1 6; 12; 17 12 d; 8 d; 10 d 143 SSRs 11.3 cM 0.52 to 0.83 46 Y
Weight + volume 6 CIMMYT Asia Panel 396 2 � 2 1 VM 331,390 GBS-SNPs 6.2 kbp Field in tubes 0.82 to 0.98 67 N Zaidi et al. (2016)
GiaRoots 3D 19 B73�Ki3 NAM RILs 175 3 � 1 1 4 d, 6 d, 8 d 1,106 SNPs 1.3 cM Hoaglands gel 0.07 to 0.55 102 Y Zurek et al. (2015)
ARIA + weight 24 384 Ames Panel 384 3 � 1 3 14 d 135,311 GBS-SNPs 15.1 kbp Paper roll 0.12 to 0.49 268 Y Pace et al. (2015)
Count + length + scans 10 B73�Gaspe Flint: BC5F2 75 2;2 9;5 7 d; 25 d 173 SSRs NA Paper roll; potting mix 0.69 to 0.95 14 N Salvi et al. (2016)
ARIA + weight 24 66 Landrace F1 DH 300 3 � 1 1 14d 62,077 GBS-SNPs 100 Mbp Paper roll 0.06 to 0.50 39 N Sanchez et al. (2018)
RPF Dynamometer 1 Ye478�Wu312: F8 218 3 � 4 4 VT (silk) + 14 d 184 SSRs 11.3 cM Field 0.61 4 Y Liu et al. (2011)
Ye478�Wu312: BC4F3 187 3 � 4 4 VT (silk) + 14 d 143 SSRs 11.3 cM Field 0.44 3 Y

RSA, root system architecture; RPF, root pulling force; ROL, radial oxygen loss; ARIA, automated root image analysis.

aQTL overlaps a meta-QTL: Y = yes, N = no.