Variation and Correlation of Oats — Part I 



47 



of grain, but not to so great an extent on those plants whose total yield 

 alone is high. 



The correlation between average weight of kernels per plant and total 

 number of kernels per plant (Figs. 48, 49, 50), determined for three years, 

 varies from — .253±.032 for 1910 to .071 ±.034 for 1912; while that 

 between average weight of kernels per plant and average number of 

 kernels per culm per plant (Figs. 51, 52, 53, 54), determined for 





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 CO 





8.5- 9.5 



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9.5-10.5 









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10.5-11.5 



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11.5-12.5 











1 





1 









1 

















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12.5-13.5 











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13.5-14.5 





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18 



14.5-15.5 





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93 



15.5-16.5 



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17 



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21 



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19 



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185 



16.5-17.5 





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138 



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38 



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16 



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1 





1 



3 3 7 16 33 32 56 53 65 58 55 39 30 27 10 



Fig. 45. — Average weight of kernels per plant in milligrams, subject 

 Average yield of culm per plant in grams, relative. 1909 

 Coefficient of correlation = .337 ± .027 



500 



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 

 20.5-21.5 

 21 . 5-22 . 5 

 22.5-23.5 

 23.5-24.5 



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 1 



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7 18 28 41 61 65 61 49 35 20 







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16 



50 



72 



103 



83 



37 



19 



10 



4 







1 



400 



Fig. 46. — Average weight of kernels per plant in milligrams, subject 



Average yield of culm per plant in grams, relative. 1910 

 Coefficient of correlation = .225 ± .032 



