Variation and Correlation of Oats — Part I 



53 



8.5- 9.5 

 9.5-10.5 

 10.5-11.5 

 11.5-12.5 

 12.5-13.5 

 13.5-14.5 

 14.5-15.5 

 15.5-16.5 

 16.5-17.5 

 17.5-18.5 

 18.5-19.5 

 19.5-20.5 



A 



1 



A 



.h 



1 



.h 



1 



o 



J, 



<^ 



1— 1 



>— 1 



(M 



(M 



CO 



CO 



'^ 



"* 



lO 





1 





1 

 1 















1 



1 



1 

 1 



1 



1 





1 



1 





1 



2 



3 



2 



5 



4 



1 







2 



5 



9 



23 



26 



20 



7 



1 





3 



8 



22 



38 



34 



39 



24 



14 



3 



2 



8 



16 



26 



33 



26 



20 



7 







3 



6 



4 



10 



9 



5 



1 











3 



5 



3 

 1 



3 



2 





8 28 57 100 115 102 61 26 



2 



1 



2 



3 



3 



18 



93 



185 



138 



38 



16 



1 



500 



Fig. 56. — • Average weight of kernels per plant in milligrams, subject 



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

 Coefficient of correlation = .120 ± .OSO 





^ 

 2 



I 



1 



t 



CO 



1 





s 

 ^ 



•* 







11.5-12.5 

















1 



1 



12.5-13.5 





1 



2 





1 









4 



13.5-14.5 



2 



1 



1 



2 



5 



5 







16 



14.5-15.5 



1 



2 



3 



10 



15 



11 



5 



3 



50 



15.5-16.5 



1 



4 



11 



19 



17 



11 



8 



1 



72 



16.5-17.5 



3 



5 



13 



28 



28 



17 



7 



2 



103 



17.5-18.5 



2 



1 



22 



17 



21 



13 



7 





83 



18.5-19.5 





3 



3 



10 



13 



7 



1 





37 



19.5-20.5 





2 



1 



5 



8 



2 





1 



19 



20.5-21.5 





1 



2 



5 



2 









10 



21.5-22.5 





1 



1 



1 



1 









4 



22.5-23.5 























23.5-24.5 











1 









1 



9 21 59 97 112 66 28 8 



400 



Fig. 57. — Average weight of kernels per plant in milligrams, subject 

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

 Coefficient of correlation = — .099 ± .033 



three years, varies from — .099±.033 for 1910 to .329±.021 for 1908. 

 This is a fluctuating correlation which is not high enough to be of impor- 

 tance, with the exception of that for 1908. This indicates that neither 

 the large nor the small kernels tend strongly to be produced on those 

 plants whose average culm yield is large or small. 



The correlation between average weight of kernels per plant and average 

 number of kernels per spikelet per plant (Figs. 58, 59), determined for 



