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DREB1A allows for more water uptake in groundnut by a large modification in the root/shoot ratio under water deficit

OAR@ICRISAT

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Relation http://oar.icrisat.org/2578/
 
Title DREB1A allows for more water uptake in groundnut by a large modification in the root/shoot ratio under water deficit
 
Creator Vadez, V
Rao, S
Sharma, K K
Bhatnagar-Mathur, P
Devi, M J
 
Subject Groundnut
 
Description High water uptake, efficient conversion of water into
biomass and high harvest index are the key components
of the yield architecture (Passioura 1977), in particular
under conditions where water deficit is common. The
International Crops Research Institute for the Semi-Arid
Tropics (ICRISAT) has been involved for many years in
the development of groundnut (Arachis hypogaea)
breeding lines having high water use efficiency (WUE),
assessed by its major component, evapotranspiration
efficiency (TE), because WUE has been identified as a
major contributor to pod yield under intermittent water
deficit conditions (Wright et al. 1993, 1994). However, a
trait-based approach using surrogates of TE as selection
criteria to select genotypes with high TE has not proved
more successful than a yield-based approach where lines
are selected based on yield under water deficit (Nigam et
al. 2005). Partly it might be because of the insufficiently
strong correlation between TE and its surrogates
(Krishnamurthy et al., in press). It may also be explained
by a reported negative link between TE and the harvest
index (HI), ie, genotypes with high TE usually had low
HI (Wright et al. 1991). These results demonstrate that
each component of the yield architecture cannot be
addressed independently from the other.
 
Date 2007
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/2578/1/DREB1A_allows_for_more.pdf
Vadez, V and Rao, S and Sharma, K K and Bhatnagar-Mathur, P and Devi, M J (2007) DREB1A allows for more water uptake in groundnut by a large modification in the root/shoot ratio under water deficit. Journal of SAT Agricultural Research, 5 (1). pp. 1-5.