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Identification of novel QTLs for late leaf spot resistance and validation of a major rust QTL in peanut (Arachis hypogaea L.)

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A Correction to this article was published on 10 November 2020

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Abstract

Co-occurrence of two devastating foliar-fungal diseases of peanut, viz., late leaf spot (LLS), and rust may cause heavy yield loss besides adversely affecting the quality of kernel and fodder. This study reports the mapping of seven novel stress-related candidate EST-SSRs in a region having major QTLs for LLS and rust diseases using an F2 mapping population (GJG17 × GPBD4) consisting of 328 individuals. The parental polymorphism using 1311 SSRs revealed 84 SSRs (6.4%) as polymorphic and of these 70 SSRs could be mapped on 14 linkage groups (LG). QTL analysis has identified a common QTL (LLSQTL1/RustQTL) for LLS and rust diseases in the map interval of 1.41 cM on A03 chromosome, explaining 47.45% and 70.52% phenotypic variations, respectively. Another major QTL for LLS (LLSQTL1), explaining a 29.06% phenotypic variation was also found on LG_A03. A major rust QTL has been validated which was found harboring R-gene and resistance-related genes having a role in inducing hypersensitive response (HR). Further, 23 linked SSRs including seven novel EST-SSRs were also validated in 177 diverse Indian groundnut genotypes. Twelve genotypes resistant to both LLS and rust were found carrying the common (rust and LLS) QTL region, LLS QTL region, and surrounding regions. These identified and validated candidate EST-SSR markers would be of great use for the peanut breeding groups working for the improvement of foliar-fungal disease resistance.

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  • 10 November 2020

    Inadvertently, Fig.��4 got published incorrectly as Fig.��2 in the original publication. The correct Fig.��2 and Fig.��4 are given in the following page.

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Acknowledgment

Financial support received from the Indian Council of Agricultural Research (ICAR), New Delhi, India, and Maulana Azad National Fellowship of UGC to the first author is gratefully acknowledged. The technical assistance in maintaining the plant population rendered by M.B. Sheikh and M.B. Kandoliya is also thankfully acknowledged.

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Conceptualized, Investigation and Supervision: GPM, RT, HPG; Data curation and analysis: SA, BN, CS, TCB; Project administration, methodology, and resources: NK, JRD; Writing—original draft: SA, GPM; Writing—review and editing: GPM, RT.

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Correspondence to Gyan P. Mishra or Radhakrishnan T..

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On behalf of all authors, the corresponding author states that there is no conflict of interest.

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The corresponding author on behalf of all the co-authors testifies that this manuscript has not currently being considered for publication or published in whole or in part in any other journal. Further, we also affirm that there are no other ethical issues of any sort are involved while performing any experiment mentioned in this manuscript.

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Ahmad, S., Nawade, B., Sangh, C. et al. Identification of novel QTLs for late leaf spot resistance and validation of a major rust QTL in peanut (Arachis hypogaea L.). 3 Biotech 10, 458 (2020). https://doi.org/10.1007/s13205-020-02446-4

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  • DOI: https://doi.org/10.1007/s13205-020-02446-4

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