Skip to main content
Log in

An autopolyploid-suitable polyBSA-seq strategy for screening candidate genetic markers linked to leaf blight resistance in sugarcane

  • Original Article
  • Published:
Theoretical and Applied Genetics Aims and scope Submit manuscript

Abstract

Key message

An autopolyploid-suitable polyBSA-seq strategy was developed for screening candidate genetic markers linked to leaf blight resistance in sugarcane.

Abstract

Due to the complex genome architecture, the quantitative trait loci mappings and linkage marker selections for agronomic traits of autopolyploid crops were mainly limited to the time-consuming and cost intensive construction of genetic maps. To map resistance-linked markers for sugarcane leaf blight (SLB) caused by Stagonospora tainanensis, the autopolyploid-suitable bulk-segregant analysis based on the sequencing (polyBSA-seq) strategy was successfully applied for the first time. Resistant- and susceptible-bulks (R- and S-bulks) constructed from the extreme-phenotypic sugarcane F1 lines of YT93-159 × ROC22 were deep sequenced with 195.0 × for bulks and 74.4 × for parents. Informative single-dose variants (ISDVs) present as one copy in one parent and null in the other parent were detected based on the genome sequence of LA Purple, an autooctoploid Saccharum officinarum, to screen candidate linkage markers (CLMs). The proportion of the number of short reads harboring ISDVs in the total short reads covering a given genomic position was defined as ISDV index and the ISDVs with indices met the threshold set in this study (0.04–0.14) were selected as CLMs. In total, three resistance- and one susceptibility-related CLMs for SLB resistance were identified by the polyBSA-seq. Among them, two markers on chromosome 10 were less than 300 Kb apart. Furthermore, the RNA-seq was used to calculate the expression level of genes within 1.0 Mb from the aforementioned four CLMs, which demonstrated that twelve genes were differentially expressed between resistant and susceptible clones, including a receptor-like kinase and an ethylene-responsive transcription factor. This is the first reported polyBSA-seq in autopolyploid sugarcane, which specifically tailored for the fast selection of the CLMs and causal genes associated with important agronomic traits.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3

Similar content being viewed by others

Abbreviations

polyBSA-seq:

Autopolyploid-suitable bulked-segregant analysis based on sequencing

SLB:

Sugarcane leaf blight

ISDVs:

Informative single-dose variants

IDDVs:

Informative double-dose variants

CLMs:

Candidate linkage markers

QTLs:

Quantitative trait loci

NGS:

Next generation sequencing

R-bulk:

Resistant bulk

S-bulk:

Susceptible bulk

PUMs:

Properly unique mappers

References

Download references

Acknowledgements

This research was funded by the National Natural Science Foundation of China (31971992, 31571732), the earmarked fund for the Modern Agriculture Technology of China (CARS-17), the Science and Technology Innovation Project of FAFU (KFA17513A) and the Open Fund of Yunnan Key Laboratory of Sugarcane Genetic Improvement (2018DG018-02). The reference genome used for analysis is kindly provided by Prof. Ray Ming and Prof. Jisen Zhang from Fujian Agriculture and Forestry University, Fuzhou, China.

Author information

Authors and Affiliations

Authors

Contributions

LX and ZW designed the study; LX, ZW, HR, CP, GL, FX and CW collected phenotypic data; ZW performed the analyses and wrote the paper; ZW, LX and YQ made a critical revision of the content of the manuscript; LX provided the financial support.

Corresponding authors

Correspondence to Youxiong Que or Liping Xu.

Ethics declarations

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical standards

The authors declare that the experiments comply with the current laws of the countries in which the experiments were performed.

Additional information

Communicated by Antonio Augusto Franco Garcia.

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Wang, Z., Ren, H., Pang, C. et al. An autopolyploid-suitable polyBSA-seq strategy for screening candidate genetic markers linked to leaf blight resistance in sugarcane. Theor Appl Genet 135, 623–636 (2022). https://doi.org/10.1007/s00122-021-03989-7

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00122-021-03989-7

Navigation