Mississii'iM iv xi'krimI':nt station. 



31 



I''r.iin tlu- discussion and tahlcs, it will be seen that the N. Tahacum 

 X N. alata h\-1irid inherited o().5'',', o its external characters, and 137.2% 

 of its internal ur niicroseopie structural eharaett'rs from N. Taliaeum, 

 the pistillate parent, while {)'.].[)' poI its external and ()2.,S',:,', of ilsinlcrnal 

 eharactcrs \\\'rc inherited fnim N. alata, the staminatc ])arent. In this 

 hyhrid, as ni the X. Tabaciim x N. s\-l\-estris cross, there sc'cnis to he a 

 close relationshi]) lu'lween internal and extennal characters; a pai"cnt 

 don inant ni one is also dominant in the other 1)\- about the same 

 ]X'r cent. 



In this cn.iss, the ])istillate parent had ]"mrc d(.)minance in none of 

 the internal characters and in oiil\- one of the external; the staminatc 

 parent had complete di.iminancc in tliri'c external and two internal 

 characters. Here, as in the first en )ss discrissed, the maiority of the char- 

 acters, b )th internal and external, were intemicdiate, — ten of the four- 

 teen extcm-al characters com])ared, and sixteen of the eij^htcen internal. 



In the idants studied there .seems to be no uniformity in the influ- 

 ence oi cither parent oa'it iiidi\'idual characters; for instance, in the N. 



Fig. 33. — Radish. 



