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Step-wise selection for early canopy traits followed by stress tolerance indices as an approach for improving drought tolerance in groundnut (Arachis hypogaea L.)

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Relation http://oar.icrisat.org/12044/
 
Title Step-wise selection for early canopy traits followed by stress tolerance indices as an approach for improving
drought tolerance in groundnut (Arachis hypogaea L.)
 
Creator Ankush, W
Ashutosh, P
Janila, P
 
Subject Groundnut
 
Description Rationale:
Drought stress at the pod filling stage of groundnut is a major yield constraint in the semi-arid tropics of Africa and
Asia.
Methods:
A population of 600 MAGIC lines (MLs) (F8/9generation) is studied in Leasyscan, a high throughput phenotyping
platform (HTPP) that assessed canopy growth up to 45 days after planting (DAP), and under managed stress
environment that uses drip lines for application of uniform and measured quantity of water in well-watered (WW)
and water-stress (WS) plots. Intermittent drought was imposed from 60 DAP coinciding with pod-filling stage, and
time domain reflectometry (TDR) probes measured soil moisture.
Results:
During 2018-19, the Mean Score Index (MSI) of Productivity and Resilience indices selected 20 MLs (MSI=9-10)
at par with the checks, ICGV 02266 (MSI=9.4) and ICGV 03043 (MSI=9.2). About 50% of the MLs (320) recorded a
Leaf Area Index (LAI) of 70% in 402 MLs, however, 29 MLs with
 
Date 2022-12-02
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/12044/1/7151_with%20cover.pdf
Ankush, W and Ashutosh, P and Janila, P (2022) Step-wise selection for early canopy traits followed by stress tolerance indices as an approach for improving drought tolerance in groundnut (Arachis hypogaea L.). In: The 7th Congress on Plant Production In Water - Limited Environment, 28 Nov - 02 Dec 2022, King Fahd Hotel, Dakar, Senegal.