A New Technique for Better Understanding the Affinity Amongst the Species and Varieties of Citrus with Special Reference To the Root-Stock Materials*

**Institute of Horticultural Research, (I.C.A.R.), 255-Upper Palace Orchard, Bangalore-6.

Indian Agricultural Research Institute, New Delhi-12.

*A part of Ph.D. thesis submitted by the senior author to Post Graduate School, Indian Agricultural Research Institute, New Delhi during 1966.