Variation and Correlation of Oats — Part II 



199 



When average weight of kernels is concerned in correlation, there is 

 always the lowest correlation for the plants grown in the least crowded 

 condition. There is usually, but not always, the greatest correlation in 

 plants grown under the most crowded conditions. The differences, too, 

 are usually of significant value. When average weight of kernels per 

 plant is correlated with average number of kernels per culm of plant 

 (Figs. 181 to 186), it is seen that in line 50 the extreme coefficients are 

 .133 ± .043 for series 63, and .466 ± .030 for series 122 — a difference 

 of .333 db .052, which is more than six times its probable error. In line 

 62 the extreme coefficients are .288 ± .036 for series 68, and .487 ± .030 

 for series 118. The difference here is .199 ± .047, which is more than 

 four times its probable error. 



Series 63 



1-H l-H !M 



9-10 

 10-11 

 11-12 

 12-13 

 13-14 

 14-15 

 15-16 

 16-17 

 17-18 

 18-19 

 19-20 

 20-21 

 21-22 

 22-23 

 23-24 

 24-25 

 25-26 

 26-27 



Totals 

 Fig. 181. 



ot> 



ci, 



^ 



i 



4 



1 

 00 



(>j 



ci 



^ 



-* 



0^ 



^ 



ci 



o ■* 



00 





1—1 



I— 1 



(M 



(M 



(M 



CO 



cc 



•^ 



■* 



lO 



»o 



CO CD 



<n 







1 





1 

























2 































1 



1 



1 





1 











1 











1 



1 





2 



1 





2 



















2 



2 



1 



1 



7 



4 



4 



3 



1 



1 



1 







1 





2 



1 



1 



5 



1 



3 



5 



1 



4 



2 



1 



2 









• 2 



1 



1 



4 



2 



2 



5 



6 



5 



2 



1 









1 







2 



2 



1 



6 



3 



5 



4 



1 



3 



1 











2 



1 





2 



2 



7 



1 



3 



2 



3 



1 













2 





8 





2 



2 



2 



3 



2 



2 











2 



1 



1 





3 



1 



1 



3 





3 



2 



1 









1 





1 



1 



4 





2 





4 







1 







1 



1 





2 

 1 



1 



2 

 2 

 1 

 1 

 2 



1 



2 



1 

 2 



1 

 1 



2 



1 



1 



1 











14 11 21 32 28 32 23 24 17 16 8 2 10 1 



Totals 



2 

 

 2 

 5 



7 

 28 

 28 

 32 



28 ■ 

 24 

 23 

 18 

 14 

 12 



7 



4 



2 



2 



238 



Correlation between average weight of kernels per plant, in milligrams, subject; 

 and average number of kernels per culm of plant, relative 



r^ .133 ± .043 



