Improving groundnut using near-isogenic lines for the first time

Foliar fungal disease screening nursery at ICRISAT-India with infector rows and test entries. Photo: P Janila, ICRISAT

Foliar fungal disease screening nursery at ICRISAT-India with infector rows and test entries. Photo: P Janila, ICRISAT

For the first time in groundnut crop, a Near-Isogenic Lines (NILs) evaluation trial of marker assisted backcrossing (MABC) derived lines, was constituted for national testing, under the All India Coordinated Research Project on Groundnut (AICRP-G).

Constituting NIL trial under AICRP-G, is a key step towards the release of NILs for cultivation in target ecologies. AICRP-G coordinates the release of groundnut varieties in India through multi-location testing of groundnut lines across five groundnut growing agroecological zones of India. Thirteen elite NILs of three mega-varieties in India were recommended for evaluation.

NILs Recommended by
ICGV 14431, ICV 13207, ICGV 13221 Mahatma Phule Krishi Vidyapeeth (MPKV), Rahuri, Maharashtra
ICGV 13189, 14410, 14438 University of Agricultural Sciences, Dharwad, (UAS-D), Karnataka
ICGV 13219, ICGV 13230, ICGV 14415 Directorate of Groundnut Research (DGR), Junagadh, Gujarat
ICGV 14411, ICGV 14441, ICGV 14407 Acharya NG Ranga Agricultural University (ANGRAU), Kadiri, Andhra Pradesh

Three mega-varieties of groundnut in India, TAG 24, JL 24 and ICGV 91114, were improved for resistance to foliar fungal diseases following marker assisted breeding approach at ICRISAT-India. Early generation (BC2F2 and BC3F2) selection, using markers for major effect QTL, followed by field phenotyping of fixed lines over two seasons, enabled identification of best-performing lines for target trait and pod yield. Subsequently, a multi-location testing at seven locations across six major groundnut growing states (Andhra Pradesh, Telangana, Gujarat, Karnataka, Maharashtra and Tamil Nadu) of India was conducted with elite lines to identify location specific high pod yielding introgression lines. Thirteen promising NILs were recommended for evaluation, under a special trial. The recommended NILs were not only superior to their respective recurrent parent but also recorded a 7-75% higher pod yield over best Zonal check.

NIL trail was constituted at the recently held workshop during 18-20 April at Junagadh Agricultural University, Gujarat.

Project: Multi-location Evaluation of MABC Derived Disease Resistant Groundnut Lines.

Investor: Grain Legumes Competitive Grants Scheme

Partners: ICAR-Directorate of Groundnut Research (ICAR-DGR), Tamil Nadu Agricultural University (TNAU), Mahatma Phule Krishi Vidyapeet (MPKV), University of Agricultural Sciences (UAS-Dharwad), Acharya N G Ranga Agricultural University (ANGRAU) and ICRISAT

CGIAR Research Program: Grain Legumes

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