Acta Agriculturae Boreali-Sinica ›› 2023, Vol. 38 ›› Issue (5): 39-50. doi: 10.7668/hbnxb.20193849

Special Issue: Wheat Biotechnology

• Crop Genetics & Breeding·Germplasm Resources·Biotechnology • Previous Articles     Next Articles

Genome-wide Association Study of Stems Sucrose Accumulation and Translocation in Wheat

DOU Jiaxin1, TIAN Tian1, WANG Peng1, LIU Yuan1, CHEN Tao1, ZHANG Peipei2, YANG Delong1,2   

  1. 1 College of Life Science and Technology,Gansu Agricultural University,Lanzhou 730070,China
    2 State Key Laboratory of Aridland Crop Science,Lanzhou 730070,China
  • Received:2023-05-14 Published:2023-10-28

Abstract:

Sucrose is the main form of water-soluble carbohydrates transported in wheat stems,and plays a key role in the regulation of wheat growth and grain filling,which is a typical quantitative trait with a complex genetic basis.The SNP loci and candidate genes significantly associated with sucrose accumulation and translocation in wheat stems were explored at the genome-wide level to provide a theoretical basis for gene cloning and molecular marker-assisted selection.Seven traits of 117 domestic wheat varieties were measured, such as the sucrose content of flowering, filling, and maturity, the translocation rate and contribution rate to grain filling of sucrose at the pre-anthesis and post-anthesis, under different environmental conditions. Based on 35K SNP microarray genotyping, a mixed linear model MLM (Q + K) was used for genome-wide association study (GWAS) and candidate gene prediction.The overall phenotypic variation ranged from 9.53% to 45.70% with rich phenotypic diversity;the heritability of seven traits ranged from 0.32 to 0.49;the genotyping results showed that the polymorphism information content (PIC) of SNP markers ranged from 0.10 to 0.38;the population structure analysis divided the tested materials into four subgroups.The MLM(Q+K)model detected 146 significantly associated loci for traits related to sucrose accumulation and transport,among them,three SNP loci were detected repeatedly in two environments,and 13 candidate genes related to sucrose accumulation and transport related traits were screened based on the 200 kb physical location interval upstream and downstream of the 3 SNP loci that were stably and significantly associated.Among them, TraesCS1B02G324100 (Nucleotide-diphospho-suger transferase gene),TraesCS1B02G324200(Cellulose synthase-like protein gene),and TraesCS1B02G324300 (β-1,3-glucanase gene) were associated with sugar metabolism.

Key words: Wheat, Sucrose, SNP, GWAS, Candidate gene

Cite this article

DOU Jiaxin, TIAN Tian, WANG Peng, LIU Yuan, CHEN Tao, ZHANG Peipei, YANG Delong. Genome-wide Association Study of Stems Sucrose Accumulation and Translocation in Wheat[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(5): 39-50. doi: 10.7668/hbnxb.20193849.

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