CEREAL IMPROVEMENT HYBRIDIZATION 225 



not present in existing varieties. Crosses are made 

 between two-row and six-row barleys, between common 

 oats and wild and hulless oats, and between common 

 wheat and almost all other subspecies of wheat. In this 

 way, durums and spelts have given the qualities of rust- 

 resistance and non-shattering to new wheats, hulless 



FIG. 69. U.S.C.I. hybrid wheat 167. Jones Winter Fife x Ufa emmer: 

 a, female parent ; 6, male parent ; c, first generation ; d, second gen- 

 eration. 



oats have contributed length of spikelet in oat hybrids, and 



six-row barleys have increased the fertility of hybrids with 



two-row sorts, while the quality of the latter is retained. 



238. Examples of the Garton hybrids. Victor oat 



was " bred from six different parents, two of which are 



fall oats." It has very long, symmetrical, wide-spreading, 



drooping panicles and jet-black kernels, and stools well. 



The young plants tend to spread out on the ground in 



Q 



