60 



Table XVL- 



CROSSBREEDING CORN. 



Yield record of 11 varieties of corn and their crossed progeny tested at 

 iitatesboro, Ga. — Continued. 



WiLUAMsoN 9 X Marlboro Prolific cf.' 



Kind of product. 



/Ears . . 

 \Stalks 

 J Ears . . 

 \Stalks 

 I Ears.. 

 \Stalks 

 (Ears. . 

 \Stalks 

 I Ears.. 

 \Stalks 

 lEars.. 

 IStalks 



Weight of product (pounds). 



Total. 



Origi- Cross 

 nal. ^™''^- 



4.50 



7.00 



0.50 

 11.75 



7.25 

 11.75 



6.25 

 10.25 



0..50 

 10.50 



8.50 

 13.00 



5.00 

 8.50 

 9.00 



13.75 

 7.00 



11.50 

 6.50 

 9.75 



10.00 



17.25 

 8.50 



13.00 



Per stalk. 



Origi- 

 nal. 



Cross. 



0.41 

 .04 

 .40 

 .84 

 .50 

 .90 

 .48 

 .79 

 .38 

 .62 

 .50 

 .76 



0.45 

 .77 

 .64 

 .98 

 .54 

 .88 

 .50 

 . 75 

 .59 



1.01 

 .50 

 .76 



Differ- 

 ence. 



0.04 

 .13 

 .18 

 .14 



-.02 



-.02 

 .02 



-.04 

 .21 

 .39 

 .00 

 .00 



Per 

 cent 

 of 

 differ- 

 ence. 



11 



21 



3S 



17 



-3 



-2 



4 



-5 



54 



64 











Number of ears 

 produced. 



Origi- 

 nal. 



11 



16 

 'i3 



14 



"u 

 'is 



AVILLIAMSON ? X EODGERS WHITE DENT cf .^ 



Cross. 



11 



"is 



'i5 



i5 



ig 



'i? 



J Ears 8. 50 



\Stalks 15.50 



/Ears 10. 75 



tstalks 18.50 



(Ears 10.50 



\Stalks 16.75 



/Ears 11.50 



\Stalks 20.25 



(Ears 6.75 



\Stalks ■< 11.25 



/Ears 7.00 



IStalks 11.75 



(Ears 3.75 



\Stalks 6.75 



(Ears 4.25 



\Stalks 6.75 



(Ears 7.75 



\Stalks 13.00 



(Ears 7.50 



IStalks 12.00 



9.50 

 17.50 

 14.75 

 25.75 

 11.00 

 17.50 

 14. 50 

 26.00 



7.50 

 12.50 



9.00 

 15.50 



3.25 



5. .50 

 5.00 

 8.25 

 8.00 



13.00 



6. 75 

 12.00 



0.47 

 .86 

 .49 

 .84 

 .58 

 .93 

 .50 

 .88 

 .48 

 .80 

 .44 

 .73 

 .63 



1.13 

 .53 

 .84 

 .52 

 .87 

 .50 

 .80 



0.53 

 .97 

 .67 



1.17 

 .61 

 .97 

 .63 



1.13 

 .54 

 .89 

 .56 

 .97 

 .54 

 .92 

 .63 



1.03 

 .53 

 .87 

 .45 

 .80 



0.06 

 .11 

 .18 

 .33 

 .03 

 .04 

 .13 

 .25 

 .06 

 .09 

 .12 

 .24 

 -.09 

 -.21 

 .10 

 .19 

 .01 

 .00 

 -.05 

 .00 



12 



13 



37 



39 



5 



4 



26 



28 



11 



11 



29 



32 



-13 



-19 



18 



22 



3 







10 







19 



21 



1 Favoring the cross: Ears, 4 out of 6; stalks, 3 out of 6. Average weight of ears per stalk produced bv 

 the female parent, 0.46 pound; by the cross, 0.54 pound. Average weight of stover per stalk produced 

 by female parent, 0.76 poimd; by the cross, 0.87 pound. Increased yield of cross over the female parent: 

 Grain, 16 percent; stover, 14 per cent. 



2 Favoring the cro.ss: Ears, 8 out of 10; stalks. 7 out of 10. Average weight of ears per stalk produced by 

 the female parent, 0..')0 pound; by the cro.ss, 0..58 potmd. Average weight of stover per stalk produced 

 by female parent, 0.S5 pound; by the cross, 0.99 poimd. Increased yield of cross over the female parent: 

 Grain, 14 per cent; stover, 16 per cent. 



In Table XVII a comparison of the effect of crossing is made 

 between the varieties as a whole, when crossed by Marlboro Prolific 

 and when crossed by Rodgers White Dent. The percentage of 

 increase or decrease in yield of the cross is given, and also the number 

 of rows out of 10 in which the production of the crossed ears w^as 

 greater tlian that of the original 2-year-old seed of the female parent 

 grown in the same hills with the cross. 



218 



