92 



Clyde E. Leighty 



coefficients among these four pairs that differ most are for yield of culm 

 and weight of straw. These are .856 dz .010 for series 1221 and .872 ± 

 .006 for series 22. The difference here is .016 ± .012, which is but little 

 larger than its probable error. 



Somewhat large differences are found when average weight of kernels 

 is considered in its relation to other characters. For yield and average 



Series 1221 



i 



Totals 



0- 1 



1 

















1 



1- 2 



1 



1 















2 



2- 3 



1 





2 













3 



3- 4 





2 8 



6 



1 











17 



4- 5 





14 



8 



3 











25 



5- 6 





8 



17 



8 



1 









34 



6- 7 





1 3 



10 



26 



6 









46 



7- 8 







4 



25 



13 



1 







43 



8- 9 









9 



19 



2 







30 



9-10 







1 



4 



19 



6 







30 



10-11 









4 



14 



12 



1 





31 



11-12 











7 



3 



3 





13 



12-13 









1 





3 



3 



1 



8 



13-14 













3 



2 





5 



14-15 













1 



3 





4 



15-16 













2 



1 





3 



16-17 

















2 



2 



17-18 

















1 



1 



18-19 

















1 



1 



19-20 















1 





1 



Totals 



3 34 48 81 79 33 14 4 1 



300 



Fig. 72. — Correlition between average yield of culm per pldnt, in 

 decigrams, subject; and average height of plant, in centimeters, 

 relative 



r= .853 ± .011 



weight of kernels, the coefficients are .493 ± .029 in series 1221 and .573 

 ± .015 in series 22; the difference here being .080 ± .034, or a little more 

 than twice its probable error. For average weight of kernels and height, 

 the coefficients are .325 ± .035 in series 1221 and .431 ± .019 in series 

 22; the difference here being .106 ± .040. For average weight of kernels 

 and number of kernels, the coefficients are .250 =b .036 in series 1221 and 

 .380 ± .020 in series 22; the difference here being .130 ± .041, or a little 

 more than three times its probable error. 



