W lit VT SELECTIONS L\ ROD ROWS 



The second stage in the process of testing promising selections is here ilhistrated. The 

 test is completed by growing the selections in plats. (Fig. 10.) 



kernel weight they are fairly stal)le and 

 always low. 



To determine the dilTerence that 

 exists between varieties, studies have 

 been made with certain types. ^ Four 

 varieties were used in this study, 

 namely. Great American, Early Cham- 

 pion, Welcome and Sixty Day. The 

 results may be briefly stated in the 

 followinj^f paragraph. 



In this study, considerable dilTerence 

 is shown in average yield of culm j^er 

 plcint. This is due to the larger kernels 

 produced l)y certain varieties, since the 

 number of kernels and of spikelcts arc 

 about the same for the different varie- 

 ties. There are varietal di (Terences in 

 the height of culm. The average num- 

 ber of kernels per spikelet is greatest in 

 the Sixty Day and smallest in the 



luirly ChamiMcjn variety. The pro- 

 portion of straw to grain diflers in the 

 different varieties. Considerable dif- 

 ference is found in the amoimt of 

 variability of difTerent characters of 

 the varieties. The greatest variability, 

 in all characters but one, is found in the 

 Welcome variety, while each of the 

 others is least variable in one or more 

 cliaractcrs. The coefficients of correla- 

 tion are usually fairly close together for 

 the difl'ercnt varieties, but some differ- 

 ences occur that may be due to varietal 

 causes. 



coOperativi: work donk 



In order to learn the further effect of 

 environments which differ greatly a co- 

 ()l)erative study has been an"anged 

 between the Montana Agricul(in-al Ex- 



' Memoir Xo. 4, Cornell University Agricultural l->x]K'nnient Station. 

 70 



