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Genetic analysis of foliar disease resistance, yield and nutritional quality traits in groundnut

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Relation http://oar.icrisat.org/10347/
http://dx.doi.org/10.5958/0975-928X.2017.00074.6
10.5958/0975-928X.2017.00074.6
 
Title Genetic analysis of foliar disease resistance, yield and nutritional quality traits in groundnut
 
Creator Chaudhari, S
Khare, D
Sundravadana, S
Variath, M T
Manohar, S S
Janila, P
 
Subject Groundnut
Genetics and Genomics
Plant Disease
 
Description A set of 340 diverse groundnut genotypes included in Genomic Selection Panel (GSP) was used to evaluate genetic
parameters and trait associations for resistance to rust and late leaf spot (LLS) along with yield and nutritional quality traits.
The findings revealed high genetic variability coupled with high heritability and genetic advance as percent of mean (GAM)
for resistance to both the diseases and yield traits, whereas low variability for nutritional quality traits with high heritability
and low GAM. Disease severity scores for rust and LLS at 90 days after sowing (DAS) were negatively associated with
yield, indicating pod yield penalty, thus deploying host-resistance for rust and LLS is a good strategy to plug the pod yield
losses and reduce the input cost. It is possible to simultaneously improve the number of pods per plant and hundred kernel
mass that contribute to pod yield as no trade-offs were detected between them. The association of oil and protein content
with pod yield showed no tradeoffs, suggesting the possibility of simultaneous improvement of pod yield either with high
oil or protein content. In breeding programs that target development of groundnut varieties to meet two distinct end-uses,
oil milling, and food and confectionery, selection for either high oil (for oil purpose) or high protein and low oil
(food/confections) will be efficient, as an inverse association between oil and protein content was observed. The use of
disease score at 90 DAS for rust and LLS is effective and optimizes resources to make selection decisions in breeding as
positive association among disease severity scores at different periods (75, 90 and 105 DAS) was observed.
 
Publisher Indian Society of Plant Breeders
 
Date 2017-06
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/10347/1/Genetic%20analysis%20of%20foliar%20disease%20resistance%2C%20yield%20and%20nutritional%20quality%20traits%20in%20groundnut.pdf
Chaudhari, S and Khare, D and Sundravadana, S and Variath, M T and Manohar, S S and Janila, P (2017) Genetic analysis of foliar disease resistance, yield and nutritional quality traits in groundnut. Electronic Journal of Plant Breeding, 8 (2). pp. 485-493. ISSN 0975-928X