Gar1)er and Ouisen1)errv : Orig-in of False Wild Oats 273 



false wild oats, provided false wild the hypothesis that natural crossing he- 

 oats owe their origin to natural cross- tween fatua and sativa oats adequately 

 ing hetween fatua and sativa forms, explains the origin of false wild forms. 

 Delayed germination was not found in In view of the foregoing considera- 

 seed from homozygous false wild, tions. the origin of false wild oats is 

 heterozygous false wild, or sativa more reasonably explained hv nmta 

 plants. Here is direct evidence against tions than by natural crossing. 



Literature Cited 



^Atwood, W. M. a Physiological Study of the (icrmination of Arena l\iliia. hi BoS. 

 Gaz. 57:386-414. 1914. 



" Criddle, N. Wild Oats and False Wild Oats. Dominion of Canada Department of 

 Agriculture, Seed Branch. Bui. S-7, 11 pp. 1912. 



^Career, R. J. Origin of False Wild Oats, hi Jour, of Hcrcd. 13:40-48. 1923. 



^ HoLBERT, J. R. and Hoffer, G. N. Control of the Root, Stalk, and Ear Rot Diseases 

 of Corn. U. S. Department of Agriculture, Farmers' Bui. 1176, 24 pp. 1920. 



° Nilsson-Ehle, H. Ueber Falle spontanen Wegfallens eines Hemmungsfaktors beini 

 Hafer. In Zcitschr. fucr indnk. Abstatnm. u. Vcrcb. 5:1-37. 1911. 



"— — . Fortgesetzte Untersuchungen uber Fatuoidmutationen beini Hafer. In 



Hcrcdita.<! 2:401-409. 1921. 



T.able II — Effect of cutting through or scaring the seed coats on delayed genuination in oats. 

 Name NUMBER OF SEEDS 



Germin- Per- Germin- Per- Un- Germin- Per- 



Seared ated centage Cut ated centage treated ated centage 



B. H. wild oat 9 3 33.3 37 7 18.9 48 1 2.1 



Y. wild oat 37 26 70.3 25 14 56.0 56 1 1.8 



Seed of F2 plants 212 96 45.3 215 101 47.0 305 3 1.0 



Table III — Correlation coefficients shoit.'- 

 ing relation betzveen type of seed articulation 

 and percentage of gerniination in the second 

 generation of certain oat crosses. 



