Molecular Breeding

, 36:1 | Cite as

TaTGW6-A1, an ortholog of rice TGW6, is associated with grain weight and yield in bread wheat

  • Mamoona Hanif
  • Fengmei Gao
  • Jindong Liu
  • Weie Wen
  • Yingjun Zhang
  • Awais Rasheed
  • Xianchun Xia
  • Zhonghu He
  • Shuanghe Cao


The TGW6 gene encodes a novel indole-3-acetic acid-glucose hydrolase and plays a significant role in improving thousand grain weight (TGW) and yield in rice. In the current study, a TGW6 ortholog from bread wheat chromosome 3AL was isolated and designated as TaTGW6-A1. Sequencing and alignment analysis showed that the cloned TaTGW6-A1 consists of a 987-bp intronless open reading frame. Three single-nucleotide polymorphisms (SNPs) were identified between cultivars with higher and lower TGW, forming two haplotypes, TaTGW6-A1a and TaTGW6-A1b. A derived cleaved amplified polymorphic sequence marker, TaTGW6-A1-CAPS, was developed to differentiate the two haplotypes. Linkage analysis using the wheat 90K iSelect SNP array mapped TaTGW6-A1-CAPS at 18 cM from BobWhite_c47304_56 in a RIL population derived from Zhou 8425B/Chinese Spring. A QTL for yield at the TaTGW6-A1 locus explained 17.4 % of the phenotypic variance in average yield over four environments. Association analysis on 242 Chinese and foreign cultivars indicated that TaTGW6-A1 was significantly associated with TGW. The cumulative frequency of the TaTGW6-A1a allele associated with higher TGW was approximately 80 %, indicating that the TaTGW6-A1a allele was positively selected in wheat breeding. In conclusion, TaTGW6-A1 in conjunction with its molecular marker may contribute as a valuable gene in improving yield potential in wheat.


TaTGW6-A1 dCAPS marker QTL TGW Yield Triticum aestivum 



This work was supported by Beijing Municipal Science and Technology Project (D151100004415003), National Natural Science Foundation of China (31161140346, 31461143021 and 31571663) and The National High Technology Research and Development Program of China (2012AA101105).

Supplementary material

11032_2015_425_MOESM1_ESM.png (140 kb)
Fig. S1 Alignment of cloned sequences for TaTGW6-A1, TaTGW6-B1, TaTGW6-D1 and AeTGW6. AeTGW 6 is the TGW6 ortholog from Aegilops tauschii. The premature stop codon in TaTGW6-D1 is boxed (PNG 140 kb)
11032_2015_425_MOESM2_ESM.png (107 kb)
Fig. S2 Alignment for amino acid sequences predicted from OsTGW6 and the cloned TaTGW6 genes with putative complete ORFs. Location of the premature stop codon in TaTGW6-D1 is shown by an arrow. The putative complete ORFs of TaTGW6 genes were predicted based on joining cloned sequences and their online reference sequences, IWGSC_CSS_3AL_scaff_4318491, IWGSC_CSS_3B_scaff_10632757 and Aegilops tauschii scaffold 4428 (3D), respectively (ENA: (PNG 107 kb)
11032_2015_425_MOESM3_ESM.png (60 kb)
Fig. S3 PCR amplification of CS nulli-tetrasomic lines with the primer set TaTGW6-A1-CAPS-F1, TaTGW6-A1-CAPS-R1. No amplification was observed in CSN3A-T3B and CSN3A-T3D, but other nulli-tetrasomics generated the expected fragment, indicating that the functional marker was located on wheat chromosome 3A. M: DL2000; 1: CSN3A-T3B; 2: CSN3A-T3D; 3: CSN5A-T5B; 4: CSN5A-T5D; 5: CSN1B-T1A; 6: CSN1B-T1D; 7: CSN4B-T4D (PNG 60 kb)
11032_2015_425_MOESM4_ESM.png (151 kb)
Fig. S4 LOD contours obtained by inclusive composite interval mapping for a yield QTL in the Zhou 8425B/Chinese Spring RIL population (PNG 151 kb)
11032_2015_425_MOESM5_ESM.doc (539 kb)
Table S1 Supplementary material 5 (DOC 539 kb)
11032_2015_425_MOESM6_ESM.doc (17 kb)
Table S2 Supplementary material 6 (DOC 17 kb)
11032_2015_425_MOESM7_ESM.doc (40 kb)
Table S3 Supplementary material 7 (DOC 40 kb)


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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Mamoona Hanif
    • 1
  • Fengmei Gao
    • 1
    • 2
  • Jindong Liu
    • 1
  • Weie Wen
    • 1
  • Yingjun Zhang
    • 1
  • Awais Rasheed
    • 1
    • 3
  • Xianchun Xia
    • 1
  • Zhonghu He
    • 1
    • 3
  • Shuanghe Cao
    • 1
  1. 1.Institute of Crop Science, National Wheat Improvement CenterChinese Academy of Agricultural Sciences (CAAS)BeijingChina
  2. 2.Keshan Agricultural Research InstituteHeilongjiang Academy of Agricultural SciencesKeshanChina
  3. 3.International Maize and Wheat Improvement Center (CIMMYT), c/o CAASBeijingChina

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