Foliar fungal disease-resistant introgression lines of groundnut (Arachis hypogaea L.) record higher pod and haulm yield in multilocation testing

Janila, P and Pandey, M K and Manohar, S S and Variath, M T and Nallathambi, P and Nadaf, H L and Sudini, H and Varshney, R K (2016) Foliar fungal disease-resistant introgression lines of groundnut (Arachis hypogaea L.) record higher pod and haulm yield in multilocation testing. Plant Breeding, 135 (03). pp. 355-366. ISSN 1439-0523

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Abstract

Introgression lines (ILs) of groundnut with enhanced resistance to rust and late leaf spot (LLS) recorded increased pod and haulm yield in multilocation testing. Marker-assisted backcrossing (MABC) approach was used to introgress a genomic region containing a major QTL that explains >80% of phenotypic variance (PV) for rust resistance and 67.98% PV for LLS resistance. ILs in the genetic background of TAG 24, ICGV 91114 and JL 24 were evaluated for two seasons to select 20 best ILs based on resistance, productivity parameters and maturity duration. Multilocation evaluation of the selected ILs was conducted in three locations including disease hot spots. Background genotype, environment and genotype × environment interactions are important for expression of resistance governed by the QTL region. Six best ILs namely ICGV 13192, ICGV 13193, ICGV 13200, ICGV 13206, ICGV 13228 and ICGV 13229 were selected with 39–79% higher mean pod yield and 25–89% higher mean haulm yield over their respective recurrent parents. Pod yield increase was contributed by increase in seed mass and number of pods per plant.

Item Type: Article
Divisions: RP-Grain Legumes
CRP: CGIAR Research Program on Grain Legumes
Uncontrolled Keywords: Marker-assisted backcrossing (MABC); Leaf rust; Late leaf spot; Groundnut; Introgression line; Pod yield
Subjects: Mandate crops > Groundnut
Depositing User: Mr Ramesh K
Date Deposited: 25 Apr 2016 06:32
Last Modified: 05 Jan 2017 16:32
URI: http://oar.icrisat.org/id/eprint/9448
Official URL: http://dx.doi.org/10.1111/pbr.12358
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: UNSPECIFIED
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