Stability of the relationship between specific leaf area and carbon isotope discrimination across environments in peanut

Nageswara Rao, R. C. and Wright, G. C. (1994) Stability of the relationship between specific leaf area and carbon isotope discrimination across environments in peanut. Crop Science, 34 1: 98-103. doi:10.2135/cropsci1994.0011183X003400010017x


Author Nageswara Rao, R. C.
Wright, G. C.
Title Stability of the relationship between specific leaf area and carbon isotope discrimination across environments in peanut
Journal name Crop Science   Check publisher's open access policy
ISSN 1435-0653
Publication date 1994-01
Sub-type Article (original research)
DOI 10.2135/cropsci1994.0011183X003400010017x
Open Access Status
Volume 34
Issue 1
Start page 98
End page 103
Total pages 6
Place of publication Madison, WI, United States
Publisher Crop Science Society of America
Language eng
Formatted abstract
In previous experiments, specific leaf area (SLA) was shown to be correlated with both carbon isotope discrimination (Δ) and water use efficiency in peanut (Arachis hypogaea L.) suggesting that SLA can be used to screen genotypes for W. However, very little information is available on the stability of the relationship between SLA and Δ across environments. The present study was conducted to examine genotype × environment (G × E) interaction for the relationship between SLA and Δ. Four peanut genotypes (Chico, McCubbin, Shulamit, and Tifton-8) with contrasting carbon isotope discriminating characteristics were grown in the field either under adequately irrigated or rainfed conditions at two locations in Queensland, Australia. The seasonal changes in Δ and SLA were examined by sampling leaves at monthly intervals. The values of Δ and SLA were significantly influenced by the location, genotype, and irrigation treatments. Genotype × location interaction effects on the relationship between Δ and SLA were not significant. The positive relationship between SLA and Δ was maintained when data were combined over sites and treatments (r2 = 0.87, P < 0.01) indicating stability of the relationship across environments. The SLA was negatively correlated with nitrogen content per unit leaf area (SLN) which in turn was negatively correlated with Δ. The results suggested that SLA can be used as a surrogate for Δ.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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Created: Wed, 25 Jun 2014, 18:25:20 EST by Dr Rao Rachaputi on behalf of Centre for Plant Science