CHAP. 



V. 



MAIZE 



Table XL (continued). 



SUMMARY. 



Upper Ear 



The total number of ears producing any given number of 

 rows was as follows : — 



A few ears are also met with in which the grains are 

 scattered promiscuously, in mosaic fashion, over the ear (Fig. 

 84A), so that the number of rows can only be determined by 

 cross-sectioning the cob. 



Experiments conducted by the writer show that the cross 

 between an 8-row and an 18-row breed results in the produc- 

 tion of an intermediate form in the F, generation. Of thirty- 

 nine cross-bred F, ears examined, only two produced the same 

 number of rows as either parent, while nearly 75 per cent 

 produced either 12 or 14 rows, i.e. more than one, and less 

 than the other, parent ; as regards these two row numbers, 

 the cross and the reciprocal cross produced nearly the same 



