Acta Agriculturae Boreali-Sinica ›› 2023, Vol. 38 ›› Issue (2): 99-105. doi: 10.7668/hbnxb.20193602

Special Issue: Wheat

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Morphological Indexes and QTL Analysis of Stem Lodging Resistance in Wheat

WANG Tao, ZHANG Yi, ZHAO Xiaoxue, CHEN Can, SI Hongqi, MA Chuanxi, LU Jie   

  1. Anhui Agricultural University,Hefei 230036,China
  • Received:2022-12-23 Published:2023-04-28

Abstract:

In order to clarify the relationship between the morphological and structural characteristics of stem basal node 2 and lodging resistance in wheat,we explored key stem morphological indicators and Quantitative trait loci(QTL)sites for lodging resistance.120 RILs families were selected as research materials,and stem strength,basal second internode length,stem diameter,wall thickness,cellulose content and lignin content were measured in 2020 and 2021,respectively.Multiple regression analysis and QTL locations were performed by combining 55K SNP data.The results showed that the stem strength was significantly or extremely significantly positively correlated with the stem diameter and wall thickness of the second basal internode,and was extremely significantly positively correlated with the cellulose content and lignin content of the second basal internode.Multiple regression analysis showed that cellulose content in basal second internode was the key index affecting stalk strength of wheat.A total of 19 QTLs related to stem traits were detected on chromosomes 1A,1D,2B,2D,4D,5A,5B,5D and 7B,explaining 7.67% to 65.33% of the phenotypic variation.On chromosome 1D,the QTL linked to AX-110771095 and AX-109431570 simultaneously controlled the basal second internode length,wall thickness and cellulose content,explaining the phenotypic contribution of 7.96%-10.76%.

Key words: Wheat, Stalk strength, QTL mapping, Lodging, Multiple regression analysis

Cite this article

WANG Tao, ZHANG Yi, ZHAO Xiaoxue, CHEN Can, SI Hongqi, MA Chuanxi, LU Jie. Morphological Indexes and QTL Analysis of Stem Lodging Resistance in Wheat[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(2): 99-105. doi: 10.7668/hbnxb.20193602.

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