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Fine mapping of QFlw-5B, a major QTL for flag leaf width in common wheat (Triticum aestivum L.)

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Abstract

Key message

A major stable QTL for flag leaf width was narrowed down to 2.5 Mb region containing two predicated putative candidate genes, and its effects on yield-related traits was characterized.

Abstract

Flag leaf width (FLW) is important to production in wheat. In a previous study, a major quantitative trait locus for FLW (QFlw-5B) was detected on chromosome 5B, within an interval of 6.5 cM flanked by the markers of XwPt-9103 and Xbarc142, using a mapping population of recombinant inbred lines derived from a cross between Kenong9204 (KN9204) and Jing411 (J411) (denoted as KJ-RILs). The aim of this study was to fine map QFlw-5B and characterize its genetic effects on yield-related traits. Multiple near-isogenic lines (NILs) were developed using one residual heterozygous line for QFlw-5B. Five recombinants for QFlw-5B were identified, and its location was narrowed to a 2.5 Mb region based on combined phenotypic and genotypic data analysis. This region contained 27 predicted genes, two of which were considered as the most likely candidate genes for QFlw-5B. The FLW of NIL-KN9204 was significantly higher than that of NIL-J411 across all the tested environments. Meanwhile, significant increases in plant height, grain width and 1000-grain weight were observed in NIL-KN9204 compared with that in NIL-J411. These results indicate that QFlw-5B has great potential for marker-assisted selection in wheat breeding programs designed to improve both plant architecture and yield. This study also provides a basis for the map-based cloning of QFlw-5B.

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Data availability statement

All data generated or analyzed during this study are included in this published article and its electronic supplementary information files, further inquiries can be directed to the corresponding author.

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Acknowledgements

This research was supported by the Youth Innovation Technology Support Planning Project for Institution of Higher Education of Shandong Province, China (2019KJF002), the National Natural Science Foundation of China (31871612), the Major Basic Research Project of Natural Science Foundation of Shandong Province, China (ZR2019ZD16), Shandong Provincial Key Research and development program (2019GNC106126), and Yantai New and Old Kinetic Energy Conversion Research Institute and Yantai Science and Technology Achievement Transfer Demonstration Base Funded Project (2019XJDN007).

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Contributions

CZ and FC designed the research; XL, HL, ZZ and RQ performed the experiments; WK, SZ, SW and YC conducted the field trials; HS and YW analyzed the data; CZ, RQ and FC wrote the manuscript and all authors read and approved the manuscript.

Corresponding authors

Correspondence to Ran Qin or Fa Cui.

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The authors declare that they have no conflict of interest. All authors contributed to the study and approved the final version for submission. The manuscript has not been submitted to any other journal.

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The authors have not disclosed any competing interests.

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Communicated by Philomin Juliana.

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Supplementary Information

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Supplementary file1 (TIF 53123 KB)

Supplementary Figures S1

Genomic distribution of InDel (> 3 bp) between KN9204 and J411 in the region of KN599.35–607.26. The abscissa indicates the physical position of the InDel; the ordinate indicates the length of the InDel; the positive value of the InDel (above) indicates an insertion in KN9204, while a negative value of InDel (below) indicates a deletion in KN9204. (XLS 63 KB)

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Zhao, C., Liu, X., Liu, H. et al. Fine mapping of QFlw-5B, a major QTL for flag leaf width in common wheat (Triticum aestivum L.). Theor Appl Genet 135, 2531–2541 (2022). https://doi.org/10.1007/s00122-022-04135-7

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  • DOI: https://doi.org/10.1007/s00122-022-04135-7

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