60 



.OLOF TEDIX 



of the heterozygotes. A few hundred Fo-plants were classified, and the 

 numbers obtained made it hkely, that two factors determined the 

 difference between the pinnatifid and the entire leaves. The numbers 

 being uncertain, however, it became necessary to consider the progeny 

 of every F^-plant in order to gain certainty as to its constitution. 



Thus seed was sown from 606 F^-pIants of the cross between the 

 pinnatifid form and the entire form from Svalöf (cross I), and from 

 306 /-M-plants of the cross between the pinnatifid form and the entire 

 form from Hort. Berg, (cross II). Being obliged to leave my cultures 

 already on the 14th of June I could not work out a full analysis of the 



Fig. 1. Different leaf shape in Camelina. a, pinnatifid; b, entire (parents); c, F^; 

 d, A Abb: e, naBB: (new forms in F,^). 



912 Fa-families. The numbers obtained, however, fully proved that 

 2 factors, viz. A and B, determine the difference in the leaf shape. 



Four types of constant Fü-families were found, the two parental 

 forms, viz. the pinnatifid, AABB. and entire, aabb, and two new forms. 

 One of these, AAbb, (fig. 1 c/) is very like the Fi-plants, being pin- 

 natifid with shorter and broader lobes than the pinnatifid parent. I 

 have received a constant form with leaves of this shape from Dr. 

 Sylvén, Svalöf, and crosses are now^ being made in order to ascertain 

 whether this one has the same constitution as the F^-form. The other 

 new form, aciBB (fig. 1 e) has deeply dentated leaves. 



It is easily distinguished from AAbb\ thus the two factors have not 

 at all the same phenotypical effect. The numbers of constant Fa-fa- 

 milies of different constitution in cross I are given in table 1, the 



