A PRELIMINARY NOTE ON THE GENETICS OF 



FRAG ART A. 



By C. W. RICHARDSON. 



The work described in this note was carried on at the John Innes 

 Horticultural Institution, and I am deeply indebted for the facilities so 

 kindly afforded me. This work is as yet in a preliminary stage, but 

 enough progress has perhaps been made to justify an interim report. 



§ I. Experiments with F. vHsca. 



(a) Alpines {F. vesca semperflorens). 



Alpines are generally said to belong to the vesca species, yet they 

 differ from the English vesca in two or three minor habits of growth 

 and in particular in the important habit of continuous flowering. 

 Amongst the numerous varieties of Alpines is one, F. de Gaillon, intro- 

 duced by Labaute in 1811, which never produces stolons (runners). At 

 present my work on the nature of this runnerless condition is scarcely 

 advanced enough to publish. But runner x runnerless always gives 

 runner-producing plants in ^j, and runner and runnerless in Kj, the 

 runner being a marked dominant. The DR plants produce fewer 

 runners in their second season than is the case with normal plants. 



Fruit Colour. 



In 1910 I crossed runnerless White {W) with runner-producing 

 Red {R), 



TABLE I. 



1910 Parents W x R 



I 



1911 Fi H 



I 

 I ' n 



1912 F-2 70 Red 20 White (no intermediates) 

 3 to 1 Expectation 67 5 R, 22 o W 



