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Enhancing drought tolerance in chickpea using genomics approaches

OAR@ICRISAT

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Relation http://oar.icrisat.org/10243/
 
Title Enhancing drought tolerance in chickpea using genomics approaches
 
Creator Thudi, M
Gaur, P M
Krishnamurthy, L
Samineni, S
Varshney, R K
 
Subject Drought Tolerance
Chickpea
Drought
Genetics and Genomics
 
Description Terminal drought is one of the major constraints in chickpea
(Cicer arietinum L.) leading to more than 50% production losses.
To overcome these production losses due to drought, a
range of translational genomics approaches are being used in
chickpea breeding to develop improved chickpea varieties for
enhancing food and nutritional security in developing countries
in the context of climate change. For understanding the complex
nature of drought tolerance, precise phenotypic data (20
drought component traits evaluated in one to seven seasons
at one to five locations in India on two intra-specific mapping
populations - ICC 4958 × ICC 1882 and ICC 283 × ICC 8261)
together with extensive genotyping data was analyzed. As a
result, nine QTL clusters containing QTLs for several drought
tolerance traits have been identified, which can be targeted for
molecular breeding. Among these clusters, one cluster harbouring
48% robust M-QTLs for 12 traits and explaining about
58.20% phenotypic variation present on CaLG04 has been
referred as “QTL-hotspot”. This genomic region contains seven
SSR markers (ICCM0249, NCPGR127, TAA170, NCPGR21, TR11,
GA24 and STMS11). This QTL region has been introgressed
in several leading varieties (e.g. JG 11, Chefe, KAK2) by using
marker-assisted backcrossing (MABC) approach. Multi-location
evaluation of these MABC lines provided several lines that
have up to 24% higher yield than the recurrent parents. Introgression
of this region into other elite cultivars will enhance
production and productivity in chickpea.
 
Date 2017-02
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/10243/1/Abstract_Book_39.pdf
Thudi, M and Gaur, P M and Krishnamurthy, L and Samineni, S and Varshney, R K (2017) Enhancing drought tolerance in chickpea using genomics approaches. In: InterDrought-V, February 21-25, 2017, Hyderabad, India.