So many recessive chlorophyll characters among plants have been reported upon in recent years that the recorded instances of such defects are almost innumerable. These characters may be lethal in their effect upon the homozygote or affect only a reduction of the chlorophyll with consequent retarded development of the plant. Chlorophyll deficiencies have been found most frequently in maize, the most notable accounts being the eminent work of EMERSON, LINDSTROM, DEMEREC, and others in reporting upon the inheritance and linkage relations of this large group of characters. A few similar recessives have also been found in such crops as wheat, barley, rice, and cotton. They have not thus far been reported in sorghum, however, except in a preliminary report of the occurrence of white seedlings (CONNER and KARPER 1924), the inheritance of which is given here more fully.

It is the purpose of this paper to describe and report the mode of inheritance of the various chlorophyll seedling characters so far studied in sorghum. In 1923, when the occurrence of white seedlings in sorghum first came to our attention when working with some inbred lines of kafir, a further search for other similar characters was instituted. In recent years