88 



IMPROVING THE QUALITY OF WHEAT. 



Table 20— Summary of analyses, showing relation ofyliadin-plus-glutenin nitrogen to proteid 



nitrogen. 



Percentage 

 of- 



Range of per- 

 centage of 

 proteid nitro- 

 gen. 



lto2 



2 to 2 5 



2.0 to 3 



3 to 3.5 



3..5to4 



4to4..5 



4. 5 and over 



Num- 

 ber of 

 analy- 

 ses. 



Pro- 

 teid 

 nitro- 

 gen. 



GUa- 

 din- 

 plus- 

 glu- 

 tenin 

 nitro- 

 I gen. 



Num- 

 ber of 

 ker- 

 nels. 



I 



3 

 21 

 70 

 26 

 10 



1.89 

 2.30 

 2.74 

 3.16 

 3.68 

 4.29 

 5.16 



1.76 

 1.68 

 1.73 

 1.95 

 1.82 

 2.22 

 2.20 



512.0 

 489.6 

 419.3 

 299.5 

 247. 5 

 416.0 

 210.6 



Weight (in grams) of- 



Kemels. 



10.4207' 

 10. 5874 

 8. 2271 

 5. 5817 

 4. 6399 

 7. 1230 

 3. 6561 



< Gliadin- 



Proteid plus-glu- 

 Average nitrogen tenin 

 kernel, in ker- nitrogen 



0.01978 

 .02173 

 .01991 

 .01817 

 .01811 

 .01790 

 .01782 



nels. 



0. 19568 

 . 24272 

 . 22222 

 . 17602 

 . 17024 

 . 30757 

 . 18685 



in 

 kernels. 



Proteid 

 nitrogen 



in 

 average 

 kernel. 



0. 18667 

 . 17872 

 . 13948 

 . 10889 

 .08613 

 . 15714 

 .08995 



0.0003744 

 .0004991 

 .0005468 

 .0005741 

 .0006620 

 .0007669 

 . 0009269 



GUadin- 

 plus-gli:- 

 tenin ni- 

 trogen in 

 average 

 kernel. 



0.0003518 

 .0003652 

 .0003442 

 .000.3516 

 . 0003.506 

 .0004019 

 . 0003886 



The figures in Table 20 sliow that while gliadin-pliis-gliitenin nitro- 

 gen increases with proteid nitrogen it does not do so in the same ratio, 

 the increase in proteid nitrogen being due in large measure to an 

 increase in other proteids. 



The same anal.yses are tabulated in Table 21 according to the 

 increase in ghadin-plus-glutenin nitrogen, and the averages for each 

 group are stated in Table 22. In the latter table the increase in 

 proteid nitrogen does not keep pace with the increase in gliadin-plus- 

 glutenin nitrogen, there being 1.74 per cent other proteid nitrogen in 

 the first group and 1.25 per cent in the last. 



It thus becomes evident that a determination of proteid nitrogen in 

 the kernel is not an accurate guide to the content of gliadin plus 

 glutenin, and that a direct determination of these substances is 



necessary. 



It is, furthermore, apparent that a determination of gliadin-plus- 

 ghitenin nitrogen will permit of the selection of kernels having a 

 large percentage of these substances. 



Table 21 .—Relation of proteid nitrogen to gliadin-plus-glutenin nitrogen. 

 GLIADIN-PLUS-GLUTENIN NITROGEN, 1 TO 1.5 PER CENT. 



Percentage of— 



Weight (in grams) of— 



Record num- 

 ber. 



Gliadin- 

 plus- 

 glute- 

 nin ni- 

 trogen. 



21210.. 

 2H107.. 



2720.i.. 



27509.. 



37705. . 



38005. . 



38606.. 



38609.. 



39405.. 



43405. . 



44606., 



45005. 



55606. 



55906. 



66006. 



Proteid 

 nitro- 

 gen. 



1.34 

 1.35 

 1.46 

 1.09 

 1.26 

 1.23 

 1.39 

 1.34 

 1.44 

 1.18 

 1.29 

 1.36 

 1.49 

 1.47 

 1.38 



Num- 

 ber of ' 

 ker- 

 nels. 



Kernels. 



Average 

 kernel. 



Average . . 



1.34 



5.03 

 3.92 

 2.36 

 2.90 

 2.64 

 2.84 

 2.63 

 2.74 

 2. 88 

 2.92 

 2.90 

 3.58 

 2.58 

 2.81 

 3., 54 



237 

 144 

 777 

 243 

 461 

 139 

 401 

 293 

 447 

 124 

 124 

 235 

 505 

 499 

 366 



3.9143 

 2.0390 



19. 1854 

 5.3615 

 S.0905 

 2.5134 

 8. 4605 

 6.7665 

 9.3541 

 2.8000 

 2. 5235 

 3. 2340 



11.0930 

 7.9968 

 6.0090 



0.01575 

 .01416 

 . 02469 

 .02206 

 .01972 

 .01808 

 .02110 

 .02309 

 .02093 

 .02258 

 .02035 

 .01376 

 .02205 

 .01603 

 . 01642 



Gliadin 

 plus-glu- 

 tenin ni- 

 trogen in 



kernels. 



3.08 



333 



6.6228 



.01939 



0.05245 

 .02753 

 . 28010 

 . 05844 

 . 10194 

 .03091 

 .117(10 

 .09067 

 . 13470 

 .03304 

 .03255 

 .04398 

 . 16529 



. .11755 

 . 08292 



.09198 



Proteid 

 nitrogen 

 m ker- 

 nels. 



Gliadin- 

 plus-glute- 

 nin nitro- 

 gen in aver- 

 age kernel. 



Proteid 

 nitrogen 

 in aver- 

 age ker- 

 nel. 



0. 19689 

 .07993 

 .45276 

 . 1.5549 

 . 23998 

 .07138 

 . 22251 

 . 18540 

 . 21399 

 .08176 

 .07318 

 .11.575 

 . 28580 

 .22471 

 . 21272 



. 18748 



0.0002113 

 .0001912 

 .0003605 

 .0002405 

 . 0(J024S5 

 .0002224 

 . 0002933 

 .0003094 

 .0003014 

 .0002664 

 .0002625 

 .0001871 

 . 0002r.09 

 . 0002356 

 .0002266 



0. 0007934 

 .0005551 

 . fX)05827 

 . 000ti399 

 . 0005327 

 .0(.)05135 

 . (KKK")549 

 . 000i;479 

 .O00(;027 

 . OOOti.594 

 . 0005902 

 . 0004927 

 . 000.5li90 

 . 00()4.")03 

 .000.5812 



.0002545 .0005843 



