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Large variation in gravimetric TE exists in wild and cultivated groundnut germplasm

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Relation http://oar.icrisat.org/5181/
 
Title Large variation in gravimetric TE exists in wild and
cultivated groundnut germplasm
 
Creator Vadez, V
Krishnamurthy, L
Nigam, S N
Upadhyaya, H D
Hoisington, D A
Aruna, R
Leal-Bertioli, S
Bertioli, D
 
Subject Groundnut
 
Description Transpiration efficiency is considered as one trait that can contribute
to achieving higher yields under conditions of limited water, and
variations for TE exist in groundnut. We have measured TE
gravimetrically in 440 genotypes, encompassing the mini-core
collection of groundnut, and have found a 4-fold range of variation
for TE (0.62-2.75 g biomass kg-1 water transpired). The relation
between the TE values measured under well-watered and water stress
conditions was significant, but the correlation coefficient was weak
(r=0.23). The surrogate traits for TE, SLA and SCMR, did not show
any significant relation with TE, regardless of water regime. By
contrast, we found that the rate of water loss per unit of leaf area was
inversely related to TE. We also measured TE under well-watered
conditions in 21 accessions of peanut wild relative and 10 accessions
of cultivated groundnut. TE varied 1.99-4.93 g.kg-1 in the wild and
2.27-3.50 g.kg-1 in the cultivated. On average, TE was higher in the
wild peanut than the cultivated. We found that the rate of water loss
per unit of leaf area was lower in the wild peanut, and was well and
negatively related to TE (r = 0.56).
 
Date 2007
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/5181/1/Large%20variation%20in%20gravimetric%20TE%20exists%20in%20wild%20and%20cultiva.pdf
Vadez, V and Krishnamurthy, L and Nigam, S N and Upadhyaya, H D and Hoisington, D A and Aruna, R and Leal-Bertioli, S and Bertioli, D (2007) Large variation in gravimetric TE exists in wild and cultivated groundnut germplasm. In: Generation Challenge Programme: Annual Research Meeting, 12–16 Sep 2007, Benoni, South Africa.