THE INHERITANCE OF PINNATIFID LEAVES IN CAMELINA 



63 



bers obtained are given in tables 3 — 6. When the families were AABb 

 the homozygote most easily recogni/ed was AAIili, whereas when 

 they were aaBb the homozygote aabb was most easily recognized from 

 the other individuals. Thus the classification in respect to B is not 

 the same in tables 5 and 6. As seen the numbers obtained agree well 

 with those expected. It thus appears probable that the segregation 

 both with regard to the factor A and the factor B is quite normal and 

 undisturbed. 



TABLE 5. F.,:AABb. 



TABLE 6. F., . aaBb. 



It may be of some interest to mention that there is a marked 

 correlation between the shape of the leaves and the length of the plant. 

 At the thrashing every unbroken Fi-plant in cross I was measured. 

 It was then found that the «abb-plants were the highest, and the AABB- 

 plants the shortest. I have not worked out the coefficient of correla- 

 tion, but only determined the middle length of the plants of the dif- 

 ferent homozygous constitutions. The data upon this fact are given in 

 table 7, and in table 8 the differences and their standard errors are 

 listed. The numbers are small but the differences seem none the less 

 to be sufficiently marked to allow us to draw the conclusion that 

 the »shortening effect» of .4 is quite certain, the difference between 



