16C> LOCK : STUDIES IN PLANT BREEDING 



few graine each, but the result so far as could be seen was in 



complete accord with those, previously described, where simple 



pairs of characters were considered, with the exception of the 



behaviour of the pale yellow grains. The palest yellow grains 



yielded about 10 per cent, of pale yellow grains, the remainder 



of the grains on the same cobs being reckoned as white. A 



considerable number of white F, grains gave a similar progeny. 



whilst others yielded white grains only, c.p. table 29. Among 



the offspring of sugary blue F* grains the following plants 



were recorded : — 



Table 49. 



Yellow. Black. 



135 . . 157 . . ) 



39 . . 82 . . } All sugary. 



63 . . 273 . . ) 



The palest yellow grains were this time counted with the 



whites, but sown separately. 



F4. 



Offspring of No. 1 above. Pollination again by G. W. S. 



Table 50. 

 Cob produced the following grains: — 

 Parenl \Y. W.&y.W.&Y. B.&W. B.&W 



Grain. only. (&y) * J 



W. .. 13 ..—.._ .. 3 .. — .. 



V. 



y- 



_ 22 — . . — 



1 10 . . — . . — .. 4 



Ii. LB 



W.= White. V. Pull yellow. y.= pale yellow. 

 ( ) indicates presence of y in some of the plants. 



The above plants can undoubtedly lie separated in spite of the 



difficult] of distinguishing W.. Y.. and \. in individual grams. 



SUMMARY. 

 Thi concerning "xenia"in maize, as well as those which 



refer to the offspring of the para Hid process of true fertilization, 

 Iih\ e been worked ou1 bj I k>] pens in the case of crosses between 

 rains <>f Indian corn, which differed in a large series 

 of characters. The experiments showed that Menders law of 

 segregation of cha in the heterozygote was approximately 



