Variation and Correlation of Oats — Part I 



45 



9 10 11 12 13 14 



1- 2 



2 





















2 



2- 3 



2 



14 



4 

















20 



3- 4 





7 



12 



2 















21 



4- 5 





4 



24 



8 



1 













37 



5- 6 







12 



14 



4 













30 



6- 7 







9 



33 



15 



4 











61 



7- 8 









17 



18 



9 



4 









48 



8- 9 









4 



15 



22 



4 









45 



9-10 











6 



15 



19 









40 



10-11 











1 



6 



15 



1 







23 



11-12 











1 



4 



15 



7 



1 





28 



12-13 















8 



6 







14 



13-14 













1 



4 



5 



3 



1 



14 



14-15 















1 



4 



1 



1 



7 



15-16 



















1 



1 



2 



16-17 



















1 





1 



17-18 



















1 





1 



18-19 





















3 



3 



19-20 



















1 



1 1 



3 



4 25 61 78 61 61 70 23 9 







400 



Fig. 43. — Total yield of plant in grams, subject 



Number of culms per plant, relative. 1912 

 Coefficient of correlation =^ .912 ± .006 



Considering the relation of total yield of plant to other plant characters, 

 it must be concluded that increase in yield must be accompanied by 

 increase in (1) culm yield, (2) kernel production, both total and average, 

 (3) average spikelet production, and (4) culm production; while, on the 

 other hand, the average weight of kernels is practically independent of 

 yield. 



Correlation of average weight of kernels per plant with other characters 



The correlation between average weight of kernels per plant and average 

 yield of culm per plant (Figs. 44, 45, 46, 47), determined for four years, 

 varies from .225±.032 for 1910 to .464±.018 for 1908. This correla- 

 tion is not very high and fluctuates considerably. It is higher, however, 

 than that between the average weight of kernels and total yield of plant, 

 as noted above. These facts indicate that the large kernels are produced 

 to an appreciable extent on those plants whose culms produce high yields 



