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Character association in mulberry under different magnitude of salinity stress

K. Vijayan,S. G. Doss,S. P.Chackraborti,P. D. Ghosh, B. Saratchandra.




Abstract

Information on interrelationships among traits is important for varietal development.Under stress conditions the magnitude of character association is known to change significantly.In mulberry such information on such aspects is lacking. Hence, the interrelationships of leaf yieldand its component morphological, physiological and biochemical traits were investigated underfour different salinity conditions using 11 genotypes. Correlation coefficient between leaf yieldand its component traits was found changing significantly under different salinity stresses. Undernormal condition leaf yield was found significantly and positively correlated with leaf size, rootlength, shoot length, protein content, and water use efficiency. However, under severe salinityimposed by 1.00% NaCl, significant correlation was observed with plant height, leaf size, shootweight, root weight, root length, protein, nitrogen reductase (NRase) activity and water useefficiency (WUE) of the plant. Similarly, relationship of plant height with other traits also changedwith increasing salinity. These changes in the interrelationships among the traits point to the needof different selection strategy for breeding varieties under normal and abiotic stress conditions.

Key words: Mulberry, correlation coefficient, salinity, leaf yield.






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