Photosynthetica 2000, 38(1):105-109 | DOI: 10.1023/A:1026756210347

Genotype Variability in Photosynthetic Characteristics in Finger Millet

Desiraju Subrahmanyam1
1 All India Coordinated Small Millet Improvement Project, G.B. Pant, University of Agriculture & Technology, Hill Campus, Ranichauri-, Tehri-Garhwal, U.P., India

High variability in leaf gas exchange and related traits were found in 30 genotypes of field grown finger millet. The variability in carbon exchange rate per unit leaf area (P N) can be partly attributed to the differences in the stomatal conductance (gs) and area leaf mass (ALM). The P N was positively correlated with total dry matter (TDM). However, no relationship between P N and seed yield was found. The leaf area showed a positive and significant correlation with total biomass. None of the other gas-exchange traits had significant relationship either with TDM or with seed yield. The ALM showed a strong positive association with P N. However, it was not correlated with either total biomass or seed yield. As a result, the use of ALM as surrogate for P N for identifying high biomass producing genotypes only had a limited value. Hence selection for high P N would result in higher biomass producing types.

Additional key words: area leaf mass; Eleusine coracana; grain mass; harvest index; internal CO2 concentration; leaf area; net photosynthetic rate; stomatal conductance; transpiration

Prepublished online: October 1, 2000; Published: April 1, 2000  Show citation

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Subrahmanyam, D. (2000). Genotype Variability in Photosynthetic Characteristics in Finger Millet. Photosynthetica, 38(1), 105-109. doi: 10.1023/A:1026756210347
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