Variation and Correlation of Oats — Part I 



61 



high, from which it is clear that the separate culms of a plant vary con- 

 siderably among themselves, thereby reducing the correlation when the 

 average culm yield is considered. 



The correlation between number of culms per plant and average number 

 of kernels per culm per plant (Figs. 69, 70, 71), determined for three years, 

 varies from .132±.033 for 1910 to .423±.025 for 1909. This again is 

 a fluctuating correlation, not particularly high in any case. It indicates 

 that the relation between the number of culms produced and the number 





g 



g 



5 



s 



o 



o 



o 

 00 



s 



§ 



o 



§ 







i 



i 



k 



i 



^ 



i 

 •o 



o 



CO 



1 



- 



1 

 o 



C3 



§ 



1 



o 



1—1 





1 



1 



1 



2 



7 



1 









1 







13 



2 



5 



7 



9 



12 



6 



8 



2 



1 









50 



3 





4 



18 



24 



35 



19 



11 



4 









115 



4 





5 



15 



36 



43 



38 



25 



23 



9 



3 



1 



198 



5 





1 





4 



15 



14 



13 



10 



6 



1 





64 



6 









2 



4 



1 



15 



7 





2 





31 



7 









1 



3 



7 



6 





1 



1 





19 



8 











1 



1 



2 



3 









7 



9 









1 







1 











2 



10 





























11 















1 











1 





6 



18 



44 



87 



108 



88 



76 



48 



17 



7 



1 



500 



Fig. 69. — Number of culms per plant, subject 



Average number of kernels per culm per plant, relative. 1909 

 Coefficient of correlation ^ .4^3 ± .025 



oa 



CO 



TjH 



lO 



<b 



t^ 



GO 



05 



5 



3 



10 



16 



9 



4 



3 





2 



17 



42 



38 



25 



8 



1 



1 



4 



10 



33 



43 



35 



30 



11 



1 



1 



2 



8 



11 



7 



6 



2 



1 





1 



3 



2 



1 



3 







1 

















13 33 96 110 77 51 17 



50 



134 



167 



38 



10 



1 



400 



Fig. 70. — Number of culms per plant, subject 



Average number of kernels per culm per plant, relative. 1910 

 Coefficient of correlation = .132 ±. .033 



