May io, 1924 Comparison of Natural and Synthetic Wild Emmers. 519 
So far as these studies have been conducted it is evident that the synthetic 
wild emmer, which occurred as a result of crossing a variety of Triticum vulgare 
and a variety of Triticum, durum , is the same as, or certainly genetically very 
similar to, the true wild emmer found in Palestine. 3 The earlier paper mentioned 
above 4 shows that, so far as the visible characters are concerned, the two forms 
are alike, and it is a very interesting fact that genetically the same is true. These 
two forms are now being compared in other ways. The evidence seems to indi¬ 
cate that the synthetic form will repeat in every way the behavior of the true 
wild form. 
Such evidence, however, does not yet answer the question as to whether this 
wild emmer, Triticum dicoccum dicoccoides , is the progenitor of all other types. 
Argument may be presented that it is the progenitor or that it is only a contem¬ 
porary form. One fact has been established, namely, that through hybridiza¬ 
tion a form similar morphologically and genetically to the true wild type has been 
found. That this is no mere accident is supported by the fact that from still 
other crosses other synthetic forms of wild emmer have been obtained. 
3 Aaronsonn, A. agricultural and BOTANICAL EXPLORATIONS IN PALESTINE. U. S. Dept. Agr. Bur, 
Plant Indus. Bui. 180, 64 p., illus. 1910. 
4 Love, H. H., and Craig, W. T. the synthetic production of wild wheat forms. Jour. Heredity 
10: 51-64, illus. 1919. 
