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Identification and evaluation of chickpea germplasm for tolerance to heat stress

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Relation http://oar.icrisat.org/3161/
http://dx.doi.org/10.2135/cropsci2011.01.0018
 
Title Identification and evaluation of chickpea germplasm for tolerance to heat stress
 
Creator Upadhyaya, H D
Dronavalli, N
Gowda, C L L
Singh, Sube
 
Subject Chickpea
 
Description Global warming and extreme temperatures are
predicted in the future, hence identifi cation of
appropriate varieties that could adapt to such
changes is imperative for sustaining crop productivity.
Thirty-fi ve early maturing chickpea
(Cicer arietinum L.) germplasm accessions were
evaluated for their tolerance to heat stress.
Plant traits such as plant width, fl owering duration,
days to maturity, pod number, seed weight,
grain yield and per-day productivity were
affected under heat stress. Genotypes differed
in their sensitivity to heat stress, and the yield
loss among genotypes varied from 10 to 15%
of potential yield for every degree increase in
temperature beyond the optimum temperature
range. Multiple regression analysis indicated
that the plant trait expression can be predicted
accurately for the assumed change in climate
on the basis of mean temperature, daylength,
duration of bright sunshine, incident solar radiation,
relative humidity, wind velocity, and potential
evaporation. Mitigation of heat stress by
irrigation and application of additional nitrogen
to the crop resulted in sustaining the potential
yield (up to 80%). ICC 14346 showed high tolerance
to heat stress and could be used as a
parent in crop improvement research. ICC 5597,
ICC 5829, ICC 6121, ICC 7410, ICC 11916, ICC
13124, ICC 14284, ICC 14368, and ICC 14653
were heat stress tolerant, responsive to irrigation
and nitrogen management, and consistently
high yielding (>1400 kg ha–1) compared with the
control ICCV 92944 (1333 kg ha–1).
 
Publisher Crop Science Society of America
 
Date 2011
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/3161/1/cs-51-5-2079-2094_2011.pdf
Upadhyaya, H D and Dronavalli, N and Gowda, C L L and Singh, Sube (2011) Identification and evaluation of chickpea germplasm for tolerance to heat stress. Crop Science, 51 (5). pp. 2079-2094. ISSN 1435-0653