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Multiple biotic stress resistant and productive genotypes identified under Spanish bunch background in groundnut (Arachis hypogaea L.)

OAR@ICRISAT

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Relation http://oar.icrisat.org/9227/
 
Title Multiple biotic stress resistant and productive genotypes identified under Spanish bunch background in groundnut (Arachis hypogaea L.)
 
Creator Motagi, B N
Gowda, M V C
Naidu, G K
Nadaf, H L
Bhat, R S
Kenchangoudar, P V
 
Subject Groundnut
 
Description The cultivated groundnut is an important oil seed crop of the world. Several pest and diseases damage the crop and
reduce groundnut yields considerably. Cultivation of resistant varieties is an ecologically sound and economically viable
approach to reduce the loss due to these stresses, but their occurrence and intensity vary in space and time necessitating
the use of multiple stress resistant genotypes. Several diverse groundnut germplasm were assessed for different biotic
stresses under epiphytotic conditions. Most of the cultivated varieties were susceptible to different stresses. Interspecific
deri vati ves constituted the best source of resistance to late leaf spot (LLS), rust and Sclerotium; while mutants were
superior for late leaf spot, Spodoptera and bud necrosis. Pedigree of multiple stress resistant genotypes revealed
contribution of wild species for resistance to many biotic stresses. Trait association studies indicated late matUling nature
of resistant germplasm. Induced mutagenesis and extensive hybridization with interspecific derivatives were sought to
break these undesirable associations. Several foliar disease resistant mutants and second cycle interspecific-derivatives
were isolated in Spanish bunch background. Mutant (28-2) and second cycle interspecific derivative (GPBD-4) were
resistant to foliar diseases with high yield potential even under foliar disease epidemic. 28-2 was also resistant to
Spodoptera, thrips and Aspergillus infection besides having bold kernels. GPBD-4 was iron absorption efficient and had
OIL ratio of 1.68. They also possessed desirable agronomic features, early maturity, high partitioning and better quality.
Mutant 28-2 and GPBD-4 have been registered with National Bureau of Plant Genetic Resources (NBPGR), New Delhi
with INGR numbers 98003(IC296686) and 0 I 031 (IC2968LO), respectively. These cultures had stable and superior
performance over popular cultivars (JL-24 and TMV-2) across years. GPBD-4 has been accepted by farmers and traders; under active seed chain and cultivation in the farmers' fields in India. GPBD-4 has been widely employed for MABC at ICRISAT and UASD as the source of resistance to LLS and rust.
 
Date 2015
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/9227/1/Introgression%20lines-LLS%20%20rust%20rest%20in%20peanut%28NGG2015%29%20pdf.pdf
Motagi, B N and Gowda, M V C and Naidu, G K and Nadaf, H L and Bhat, R S and Kenchangoudar, P V (2015) Multiple biotic stress resistant and productive genotypes identified under Spanish bunch background in groundnut (Arachis hypogaea L.). In: Proceedings of the 8th International Conference of the Peanut Research Community-Advances in Arachis through Genomics and Biotechnology (AAGB-2015), November 4 - 7, 2015., Brisbane, Australia.