Freeman: Bread Making Wheats for Warm Climates 217 



It will be noted from this table that 

 whenever the parent plant had grains 

 all soft or all hard, the parental char- 

 acter was followed in all of the off- 

 spring. When, however, the parental 

 plant exhibited its hybrid nature by a 

 mixture of grain types, the offspring 

 varied according to the type of seed 

 planted. Selected hard seed produced 

 either plants having all hard seed or 

 else plants having a mixture of hard 

 and intermediate seeds, but no plants 

 having soft seeds. Again, selected soft 

 seed produced plants having a mixture 

 of intermediate and soft seed or else 

 plants with all soft seeds, but no plants 

 having hard seeds. We may assume 

 that seeds giving rise to plants having 

 a mixture of grain types are hetero- 

 zygous with regard to endosperm tex- 



ture, whereas those giving rise to plants 

 having seeds either all hard or all soft 

 are homozygous with regard to these 

 characters. The above results indicate 

 therefore that we are unable, accurately 

 to distinguish between hard and inter- 

 mediate (homozygous and hybrid hard) 

 grains, on the one hand, and between 

 intermediate and soft (hybrid and ho- 

 mozygous soft, grains, on the other 

 hand, but we mistake a homozygous 

 hard grain for a homozygous soft one. 



In the summer of 1915 a large num- 

 ber of plant selections were made from 

 the Fo plants of the macaroni bread 

 wheat crosses from which plant rows 

 were sown in the fall of the same year. 

 A study of the inheritance of grain 

 texture in the resulting Fg generation 

 harvested in the spring of 1916 can 

 be summarized in the following table : 



Table IV. — Inheritance of Grain Texture in the Fz, 1916 



1 X 35 Cross 



(a) Like Plate III a 



(b) Like Plate III b. 



(c) Like Plate III c. 



