1Division of Genetics, Indian Agricultural Research Institute, New Delhi, 110 012, India
*Corresponding author: mithleshgenetix@gmail.com
Online published on 18 May, 2015.
A set of 91 diverse soybean accessions were analysed for 10 morphological traits with special reference to water use efficiency using carbon isotope discrimination (CID) technique. The coefficient of variation for CID values was found to be 3.36%. There is negative correlation between Δ13C values (CID values) and WUE. The genotypes which registered lower values of Δ13C are more water efficient than the genotypes with higher Δ13C values. The range of Δ13C values observed in this experiment are slightly lower than that reported in sugar beet (Δ13C 17.66‰ to 22.96‰), (Rajabi et al., 2009). Genotype UPSL309 has highest CID value (22.91‰) indicating low WUE and genotype DS9813 has lowest CID value (19.95 ‰) with high WUE. In present study randomly classified genotypes as high WUE (CID less than 20.5 ‰), medium WUE (CID between 20.6 to 22.4 ‰) and low WUE (CID above 22.5 ‰). There were 7 genotypes which were found to show high WUE, and 13 exhibited low WUE whereas, rests of the 71 genotypes were medium in WUE.
In 91 diverse soybean accessions there are 7 which show high WUE, 13 exhibited low WUE and rest 71 accessions were medium WUE.
Glycine max (L) Merrill, Water Use Efficiency (WUE), CID, genotypes
