POLYPLOID SERIES 



155 



somes split lengthwise, and the daughter chromosomes 

 move to the poles, not, however, with complete regu- 

 larity. When the distribution is equal there will be 21 

 chromosomes at each pole. 



EMMER BY VULGARE 



21 



(l4 + 14) + 7 



> •i «- 



^ 



Fig. 91, 



Eeduetion division of the hybrid between Emmer and Vulgare 



wheat. (After Sax.) 



In passing it should be recorded that according to 

 Sax's results for triploid wheat, the 7 single chromo- 

 somes do not divide at this time, but are distributed un- 

 equally to the poles, the more common distribution being 

 3 and 4 (Fig. 91). 



At the second division, according to Kihara, 14 chro- 

 mosomes that are split lengthwise appear and 7 chromo- 

 somes that are not split. The former divide, 14 going to 



