Variation of SPAD Chlorophyll Meter Readings (SCMR) in the mini-core germplasm collection of chickpea.

Book Title: NA
Year Published: 2006
Month Published: NA
Author: Kashiwagi, J. ; Krishnamurthy, L. ; Sube, Singh ; Upadhyaya, H. D.
Book Group Author: NA
Abstract:

A study was conducted to document the extent of variation available for the SPAD Chlorophyll Meter Readings (SCMR) in the mini-core germplasm of chickpea, and also to identify accessions with contrasting SCMR. The entire mini-core germplasm collection of C. arietinum (211 accessions) along with 5 genotypes (Annigeri, ICC 4958, Chafa, ICCV 2, and ICC 898) as references were evaluated by measuring the SCMR in a precision Vertisol field (fine montmorillonitic isohyperthermic typic pallustert) in ICRISAT (Patancheru, Andhra Pradesh, India) during the 2005/06 postrainy season. There were two different irrigation treatments (rainfed and optimally irrigated). The SCMR measurement was taken at 62 and 90 DAS by using SPAD-502 meter. At 62 DAS, differences in SCMR readings among the entries were significant in both rainfed and optimally irrigated conditions. The overall mean of rainfed condition (57.6) was significantly higher than the overall mean in irrigated condition (47.4). Regardless of the irrigation schemes, ICC 16374 had a superior SCMR with 66.4 (1st rank) in irrigated conditions and its rank was 4th in rainfed environment. At 90 DAS, the SCMR measurement was taken in optimally irrigated treatment only as most of the entries in rainfed condition had senesced and matured. There was a significant difference on SCMR among the entries, with ICC 15888 having the highest value of 62.7. Although there was a significant linear correlation between at 62 and 90 DAS observations within the optimally irrigated treatment, there also existed a significant genotype × environment interaction reflecting the effects of duration on SCMR observation. This would suggest that meaningful observations can be obtained at early stages of crop growth. The germplasm accession ICC 16374 showed superior and more consistent SCMR readings than the others. The new genotypes identified, though the results need to be confirmed, could be utilized as valuable breeding sources to improve the drought resistance of chickpea.

Pages: 1 - 3
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Volume: 2
Number: 1
Journal: Journal of SAT Agricultural Research
Journal ISO: NA
Organization: NA
Publisher: NA
ISBN: NA
ISSN: 0973-3094
DOI: NA
Keywords:

chickpeas, chlorophyll, correlation analysis, droughtresistance, genotypes, germplasm, irrigation, soil types, Vertisols,Andhra Pradesh, India, Cicer arietinum, India, South Asia, Asia,Developing Countries, Commonwealth of Nations, Cicer, Papilionoideae,Fabaceae, Fabales, dicotyledons, angiosperms, Spermatophyta, plants,eukaryotes, drought tolerance, watering, Field Crops (FF005) (New March2000), Plant Breeding and Genetics (FF020), Plant Composition (FF040),Soil Water Management (Irrigation and Drainage) (JJ800) (Revised June2002) [formerly Soil Water Management]

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