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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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Title 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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Creator Suhail Ahmad, Bhagwat Nawade , Chandramohan Sangh , Gyan P Mishra , Tejas C Bosamia , Radhakrishnan T , Narendra Kumar , Jentilal R Dobaria , Harsukh P Gajera
 
Subject Expressed sequence tag · Foliar-fungal disease · Groundnut · LLS · QTL mapping
 
Description Not Available
Co-occurrence of two devastating foliar-fungal diseases of peanut, viz., late leaf spot (LLS), and rust may cause heavy
yield loss besides adversely afecting the quality of kernel and fodder. This study reports the mapping of seven novel stressrelated 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 identifed 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 identifed
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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Date 2023-08-01T04:29:33Z
2023-08-01T04:29:33Z
2020-10-01
 
Type Research Paper
 
Identifier Ahmad S, Nawade B, Sangh C, Mishra GP, Bosamia TC, T R, Kumar N, Dobaria JR, Gajera HP. Identification of novel QTLs for late leaf spot resistance and validation of a major rust QTL in peanut (Arachis hypogaea L.). 3 Biotech. 2020 Oct;10(10):458. doi: 10.1007/s13205-020-02446-4. Epub 2020 Sep 30. Erratum in: 3 Biotech. 2020 Dec;10(12):521. PMID: 33088655; PMCID: PMC7527388.
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http://krishi.icar.gov.in/jspui/handle/123456789/80372
 
Language English
 
Relation Not Available;
 
Publisher Springer