88 Fertility hi Cichorium intybus 



3. Fertilities in various Vegetative Types or Races. 



The continued growth of line progenies by self-fertilization of parents, 

 as practised in my chicory cultures, has led to the isolation or segregation 

 of various vegetative types or races that are very distinct, not only from 

 each other but from the general character of the original parents crossed, 

 or even from the first self-fertile parents of the Fi. 



Marked uniformity among the sister plants of a single series first 

 appeared in the Fs generation, which was the second generation 

 after self-fertile plants appeared. For example, the plants of series 

 (A X F22)-10-13- Were very uniform in habit of growth, as is very 

 well shown in Plate IV. (The field number of this series was 41.) The 

 plants were abundantly branched, making rather bushy compact indi- 

 viduals constituting a semi-dwarf bushy race. In respect to flower 

 colour, this series was variable. In the foreground of Plate IV, im- 

 mediately in front of field label 41, is a typical plant of series 

 (E22 X A)-I0-8-. The habit of growth here shown is very different 

 from that of the semi-dwarf bush race. It is characterized by a tall 

 well developed main stem with large conspicuous leaves. The branching 

 is somewhat sparse and is erect ; at the time the photograph was taken 

 the branching of the plant in question had not developed. More 

 mature plants of this type are shown in Plate V (see field label 

 no. 49). 



As has been noted above, and as shown in Table VII, two plants of 

 (E2^ X A)-10-8- and three plants of {E'22 x A)-10-13- were selected 

 as parents for a further generation. A part of each series of the latter 

 is shown in Plate V. To the right of field label 49 is a row of 

 {E22 X A)-10-13-5- which, it may be said, had not fully developed 

 when the photograph was taken ; in front of this label are plants 

 of {E22 X A)-10-13-13-, and to the left are shown plants of 

 {E22 X A)-10-13-12-. All the plants of these three series were 

 quite alike in having a general habit of growth that was quite 

 identical to that of the parents. 



The very different vegetative habit of the series {E22 x A)-10-8- 

 and of the next generation, series {E^^ x A)-10-8-14'- and -15-, is 

 shown in Plate V in the plants of field number 49. 



Other equally well marked vegetative types appeared in the F^, 

 and bred as true in the F^. Series {A x E22)-9-6-6- is one of rather 

 medium but scraggly growth, and with brittle branches and stems. 

 (See Plate V, field number 53.) 



