stout: pollinations in cichorium intybus 



TABLE 12 — Continued 



391 



Seed parent 



Pollen parent 



Record for heads pollinated 



Dates 



Heads 



with no 



seed 



Heads 



with 

 seed 



Seeds per head 



E3- 



{Ej X A) 710. I. 

 2. 



11" 

 12. 



2, 6 



I, 4. 5 



B, B, B 



8, B 



8,8,3 + B,7 + B 



(Ej X ^ ) no. I 

 3 

 5 

 8 



9 

 10 



E3- 



A self-fertile plant. 



fertility as pollen-parent with their own parents, there was a 

 marked contrast; the {A X E3) plants were completely sterile 

 to A, while the {E3 X A) plants were highly fertile to A and also 

 to E3. On the other hand, of the 6 plants of (£j X A) used as 

 seed-parents with pollen of £j, only 2 showed any degree of 

 fertility. 



The table includes data on five pairs of reciprocals; of the 

 {A X £j) plants, no. i with no. 2, and no. 3 with no. 4 gave no 

 seed, of the (£j "X. A) series, no. 5 with no. 7 were sterile, and the 

 pair (£j X A) no. i with E3 were sterile; but (Ej X A) no.3 X E3 

 was sterile while its reciprocal was fertile. 



There were 11 cases in table 12 (indicated by *) in which pollen 

 from a self-fertile plant was used on the pistils of a self-sterile 

 plant; such pollen proved fertile in 8 combinations and sterile in 3. 

 The number of crosses is not great, but is evidence that the pollen 

 of self-fertile plants gives much the same sort of results in crossing 

 as pollen of self-sterile plants. 



Results of cross-pollinations involving the {A X E22) hybrids. — 

 Of the {A X E22) series there has been opportunity to test i plant 

 (no. 10) as seed-parent with 21 of its sister plants. The data 

 given in table 13 shows that there was fertility in but 4 of these 

 crosses. Eleven were used as pollen-parents on A\ oi these 5 

 were sterile and of the 6 fertile crosses, i (no. 4) was highly fertile. 



