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Variation of SPAD Chlorophyll Meter Readings (SCMR) in the Mini-Core Germplasm Collection of Chickpea

OAR@ICRISAT

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Relation http://oar.icrisat.org/2532/
 
Title Variation of SPAD Chlorophyll Meter Readings (SCMR) in the Mini-Core Germplasm Collection of Chickpea
 
Creator Kashiwagi, J
Krishnamurthy, L
Singh, S
Upadhyaya, H D
 
Subject Chickpea
 
Description Drought is one of the major causes of yield losses in
chickpea (Cicer arietinum). A large portion of such
losses can be avoided through crop improvement. Simple
analytical models are often used to dissect out and to
understand the effects of model parameters on the final
yield. Passioura (1977) proposed one such model where
yield is considered a function of transpiration, transpiration
efficiency (TE) defined as crop biomass production per
unit water transpired, and harvest index. Among these
three components, genetic enhancement of TE has been
taken up as a major research effort in crop improvement
programs throughout the world (Bindu Madhava et al.
2003). Although TE is considered a highly useful trait, it
was also categorized as a difficult one to screen. Therefore,
it becomes necessary to identify surrogate traits that are
closely associated with TE for rapid screening of a large
number of genotypes. A direct close relationship of TE
with SPAD Chlorophyll Meter Readings (SCMR) was
reported in groundnut (Nageswara Rao et al. 2001; Bindu
Madhava et al. 2003) and SCMR is a direct linear
relationship through extracted leaf chlorophyll (Yadava
1986) and also related leaf nitrogen concentration (Kantety
et al. 1996; Bullock and Anderson 1998). The advantages
such as easy and rapid measurement, nondestructive
method and light weight made SPAD meters the best
choice for use in the trait-based groundnut breeding
program to improve the drought tolerance of groundnut at
the International Crops Research Institute for the Semi-
Arid Tropics (ICRISAT) (Serraj et al. 2004).The same
strategy can be applied to chickpea, provided baseline
information is available on genetic diversity of SCMR in
chickpea. The chickpea mini-core collection has been chosen
to collect such information as the number is manageable
for initial exploratory efforts and it represents the
diversity of the whole germplasm collection (Upadhyaya
and Ortiz 2001), Thus, the main objective of this study
was to document the extent of variation available for the
SCMR readings in the mini-core germplasm of chickpea,
and also to identify accessions with contrasting SCMR.
 
Date 2006
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/2532/1/Variation_of_SPAD_Chlorophyll_Meter.pdf
Kashiwagi, J and Krishnamurthy, L and Singh, S and Upadhyaya, H D (2006) Variation of SPAD Chlorophyll Meter Readings (SCMR) in the Mini-Core Germplasm Collection of Chickpea. Journal of SAT Agricultural Research, 2 (1). pp. 1-3.