IMPROVING SELF-FERTILIZING CROPS 



141 



TABLE XXXII. SUMMARIZED DATA OP MOST SIGNIFICANT CHARACTERS 



OP CONNECTICUT HAVANA No. 38 TOGETHER WITH PARENT AND 



NORMAL STRAINS. AVERAGE OP EIGHT YEARS 



FIG. 31. Tobacco No. 26. A pure line strain with a low leaf number and a 

 high breadth index of leaf. Note the method of insuring self-fertilization by 

 covering the terminal inflorescence with a manila paper bag. (After Johnson, 

 1919.) 



No. 33 is a desirable strain of the normal Connecticut Havana 

 type produced by continued selection and inbreeding. Breadth 



