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Pakistan Journal of Biological Sciences
Year: 1998  |  Volume: 1  |  Issue: 2  |  Page No.: 111 - 114

Intravarietal Variability in Rice (NR-I) with Respect to Salt Stress

M. A. Naeem, R. H. Qureshi, M. Aslam, R. Ahmad, N. Ahmad, A. Hussain, M. Saleem and K. Hussain    

Abstract: In order to determine genetic diversity of NRI against NaCl salinity, a study in hydropnic system was carried out with 60 plants of NRI at 70 ml m-3 NaCl salinity. Plants were grown up to maturity and on the basis of growth and paddy yield, the plant population of NR-I was divided into five tolerance classes and corresponding values of K+, Na+, Cl-, K:Na and P:Zn ratio were averaged and relationships of these parameters with the salt-tolerance character was evaluated. The study revealed that salt tolerance of various population groups was correlated with the exclusion of Na+ and Cl-, better maintenance of K+, high K:Na and low P:Zn ratios in the leaves. The chemical composition of leaves depends upon the age of the leaf.

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