GENETICAL RESEARCH WITH MAIZE 1) 
by E. W. LINDSTROM 
Iowa State College 
INTRODUCTION. 
DESCRIPTION AND INHERITANCE OF GENETIC CHARACTERS. 
EAR CHARACTERS. 
ENDOSPERM CHARACTERS. 
PLANT CHARACTERS. 
CHLOROPHYLL CHARACTERS. 
ANTHOCYANIC OR PLANT.COLOR CHARACTERS. 
VARIEGATION AND MUTATION. 
LINKAGE GROUPS OF MAIZE. 
RELATIVE FREQUENCY OF CROSSING OVER IN MICROSPOROGENESIS AND 
IN MEGASPOROGENESIS. 
EFFECTS OF INBREEDING IN MAIZE. 
ALPHABETICAL LIST OF GENETIC FACTORS IN MAIZE. 
BIBLIOGRAPHY. 
Genetical experimentation among plants has revealed no more ferti- 
le source of material than the corn or maize plant (Zea mays). There 
are two fundamental reasons for this. First, there is a surprisingly large 
number of characteristics already available, either among the commer- 
cial varieties or among the types grown by the American Indians. The- 
se include the many heritable variations in morphological structure, in 
anthocyanic pigments, in chlorophyll types, in ear, seed coat, and en- 
+ dosperm characters. 
1) Paper No. 2. Department of Genetics, Iowa State College, Ames, Iowa. Pu- 
blished with the approval of the Director of the Station. 
This summary of the recent genetical work on maize was prepared at the re- 
quest of Dr. J. P. Lotsy when he was in the United States in 1922: 
