May 8, 1916 



Occurrence of Sterile Spikelets in Wheat 



245 



sterile spikelets and the number of tillers per plant. The less vigorous 

 plants, indicated by the smaller number of tillers per plant, do not show 

 a higher percentage of sterile spikelets than the more thrifty plants. 



Table VI. — Correlation between the percentage of sterile spikelets per plant and ike 

 number of tillers per plant in wheat^ 



' r=— o.o756±o.0387- 



CORRELATION BETWEEN THE PERCENTAGE OF STERILE SPIKELETS AND 

 THE YIELD OF GRAIN PER PLANT 



Between the percentage of sterile spikelets and the yield of grain per 

 plant (Table VII) the coefficient of correlation is negative, — 0.306 ±0.035. 

 This correlation is fairly high and though expressed negatively indicates 

 that the higher yielding plants have a smaller percentage of sterile spike- 

 lets than those of low yield. 



Table VII. — Correlation betiveen the percentage of sterile spikelets per plant and the yield 



of grain per plant in wheal ^ 



-o.30S7±o.03S3. 



