April I, 1920 



A Teosinte-Maize Hybrid 



35 



Table VI. — Correlation of characters desirable in a forage plant"' 



<* Figures in bold-face type indicate coefficients of correlation between the characters where a combina- 

 tion of teosinte and maize characteristics is desired. 



Of the 15 character pairs where new combinations are desired, there is 

 only one significant correlation. This is days to pollen and total leaves. 

 In this one instance the relation is in a sense physical, sirce there is 

 obviously a physical limit to the number of leaves that can be developed 

 in a very short season. The indications from this comparison are, there- 

 fore, that coherence presents few obstacles to the securing of desired 

 combinations. (PI. 2; 6, A, B.) 



Another view of the comparative independence of the characters 

 may be gained by an examination of the plants that were most like 

 maize or teosinte with respect to some of the more important characters. 

 Table VII is provided to make this possible. Bach pair of columns 

 gives the measurements for two plants, one of which was the most like 

 maize and the other the most like teosinte with respect to the character 

 named at the head of the column. 



Table VII. 



-Comparison of individual plants, showing the extreme variations toward 

 maize and teosinte, respectively o- 



1 Each pair of columns gives the measurements of two plants, one of which was most like maize and the 

 other most like teosinte with respect to the character given at the head of the columns. The value of the 

 character for whii-h the plant was selected is given in bold-face type. For description of units of meas- 

 urement, see p. 7-8. 



^ The number of primary branches that terminate in a stamiuate panicle, exclusive of suckers. 



