14 JOURNAL OF THE WASHINGTON ACADEMY OF SCIENCES VOL. 11, NO. 1 



Since the first pair of linked characters was found in maize 

 in 191 1, six others have been reported, the present pair making 

 the eighth. 



The linked characters reported thus far are listed below: 



" Emerson (1918) explains this relationship in another way. 

 * Actual factors involved not identified. 



Brachytic culms, a variation in which the internodes are verv 

 much shortened, made its appearance in a second generation 

 hybrid and thus far behaves as a unit character in crosses with 

 the normal form. (Kempton 1920.) Unlike Emerson's extreme 

 dwarf anther ear (Emerson 191 2) the brachytic variation is not 

 readily recognized in the seedling stage but is conspicuous before 

 the tassel appears. 



This variation has been crossed with several others in an effort 

 to determine its relationships. Many of these crosses have been 

 carried through the second generation and most of them indicate 

 little if any association of the brachytic character with the other 

 variations. In some of the crosses the results were conflicting 

 and further analysis is necessary. One relationship, however, 

 seems certain, since it is corroborated in three unrelated crosses. 

 This is the association of brachytic culms with cob and pericarp 

 color. 



