SFELTLIKK BUD-SPORTS IN COMMON WHEAT 



121 



the typical side of the spike (19 seeds). The former gave rise to 12 

 plants and the latter to 16, all of the normal type. 57 seeds from the 

 other typical spikes gave also typical plants only (31 plants). 



In the plot 1917 — 161 there were also speltoids — both heterozygotes 

 and bearded ho- 

 mozygote spel- 

 toids (fig. 4). 

 When compa- 

 ring these and 

 the above de- 

 scribed chi- 

 maera it was 

 observed that 



the speltoid 

 outer glumes of 

 the latter were 

 most like those 

 of the heterozy- 

 gotes. Seeds 

 from these he- 

 terozygotes were 

 also sown, and 

 they gave rise 

 to plants both 

 of the normal 

 type, speltoid he- 

 terozygotes and 

 bearded, homo- 

 zygote speltoids 

 in the ratio 

 1,54 : 2,11 : 0,35. 



If a real chi- 

 maera between 

 the normal type 

 and its sj^eltoid 



heterozygote is present also in this case — and I do not doubt that this 

 is so — then it must be assumed here, as in the case first described, that 

 only the epidermis of a part of the straw with the chimaeva-like spike is 

 made up of the speltoid sector. 



A third chimaera of this kind was found in another plot (1917 — 165) 



Fig. 4. 



A speltoid mutation from tiie cross Brown Schlanstedt 



spring-wlieat X Borsumwhcat. 

 Tiie normal type. 

 The speltoid heterozygote. 

 The homozygote, bearded speltoid. 



