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



table 5. It will be seen from this table that the relation of cob 

 color to liguleless leaf is very erratic with a mean crossover 

 percentage of 45.3, which is practically independence. It is 

 possible, therefore, that the slight relationship of the leaf and 

 culm characters indicated in table 4 is but the result of chance 

 and that the genes for these two characters are borne in reality 

 by separate chromosomes, though this point cannot be deter- 

 mined definitely until some character is found that is independent 

 of cob color and measurably correlated with brachytic culms. 



Literature cited. 

 Bregger, T. Linkage in maize. The Caleurone factor and waxy endosperm. Amer. 



Nat. 52: 57-61. 1918. 

 Collins, G. N., and Kempton, J. H. Inheritance of waxy endosperm in hybrids of 



Chinese maize. IV Conference Internationale de Genetique, Paris, 1911. 

 Emerson, R. A. Genetic correlation and spurious allelomorphism in maize. 24th 



Ann. Rep. Nebraska Agric. Exp. Station, 1911. 



The inheritance of certain abnormalities in maize. Amer. Breeders Assoc, 1912. 



A fifth pair of factors, A a, for aleurone color in maize, and its relation to Cc and 



Rr pairs. Cornell Univ. Agric. Exp. Sta. Memoir 16. November, 1918. 

 Kempton, J. H. A correlation between endosperm color and albinism in maize. This 



Journal 7: 146-149. March 19, 1917. 



Inheritance of spotted aleurone color in hybrids of Chinese maize. Genetics 4: 



261-274. May, 1919. 

 Jones, D. F., and Gallastegui, C. A. Some factor relations in maize with reference 



to linkage. Amer. Nat. 53. May, June, 1919. 

 Lindstrom, E. W. Chlorophyll inheritance in maize. Cornell Univ. Agric. Exp. 



Sta. Memoir 13. Aug., 1918. 



