No. 598] 



INHERITANCE OF EYE PATTERN 



585 



timeters. Usually they develop few branches. Under 

 ordinary conditions such beans do not show indeterminate 

 growth. However, from the investigations of Emerson 

 (1916) it is probable that they would do so if growth were 

 not stopped by unfavorable conditions or excessive seed 

 production. 



Data as to type of vine are available from 247 of the 

 plants given in Table I. Table III shows the distribu- 

 tion of the type of vine for each of the three eye patterns. 

 The data for each pedigree number are summarized sep- 

 arately. 



TABLE III 



The most striking thing in connection with this table is 

 the complete absence of runner vines among the Old- 

 Fashioned Yellow Eye beans. Apparently the gene for 

 bush type of vine is closely associated with the gene for 

 the Old-Fashioned Yellow Eye pattern. That this asso- 

 ciation is not absolute under all conditions is indicated 

 by the fact that I now have two strains of Old-Fashioned 

 Yellow Beans of unknown origin which for several gen- 

 erations have bred true to a distinct runner type of vine. 

 A number of crosses have been made using these runner 

 types of Old-Fashioned Yellow Eye. It is hoped that 



throw some light upon this question. 



Attention may be called to the apparent 1 : 1 ratio of 

 runner to bush in the case of the piebald and Improved 

 Yellow Eye beans. Emerson (1904, 1916), von Tscher- 

 mak (1904, 1912) and others have shown that in crosses 

 between tall (runner) and dwarf beans the expected F 2 



