544 WHITE— STUDIES OF INHERITANCE IN PISUM. 



Varieties Studied. 



Tails. 



Purple Sugar Pea, Victoria, Laxton's Alpha and others — Bateson 



(I). 

 British Queen — Hurst (42). 

 Telegraph, Ceylon Native No. i. Telephone, French Sugar Pea — 



Lock (54). 

 Numerous varieties — Tschermak. 

 French Sugar, Market Split Pea, Wachs Schwert, Pisum elatius. 



Mummy and others — White (unpublished data). 



Half Dzvarfs. 



Fillbasket and numerous varieties — Bateson (i). 

 Ringleader, Ceylon Native No. 2 (?), Satisfaction — Lock (54). 

 Express, Serpette, Plein le Panier (Fillbasket), numerous varie- 

 ties — Tschermak (81). 

 Autocrat, Bountiful — Keeble and Pellevv (49). 

 Numerous varieties — White (unpublished data). 



Dzvarfs. 



Numerous varieties — Bateson (i). 



Eclipse — Hurst (42). 



Ceylon Native No. 2 (?), Earliest Blue and others — Lock (54). 



Couturier, numerous varieties — Tschermak. 



Nott's Excelsior, Laxtonian and others — White (unpublished data). 



Results from Crossing. 



Most of the crosses involving height were not grown with enough 

 regard to environmental conditions, so that the data, although plenti- 

 ful, are valuable only for making broad generalizations. In crosses 

 between tails and dwarfs, the F^ is generally even taller than the 

 tall parent. 



Tails X tails gives only tails in F^ and succeeding generations. 



Tails X half dwarf give tails in F^. In F2 Tschermak (81) ob- 

 tained 48 tails; 18 half dwarfs or a ratio of 2.3: i. Bateson (i, 3) 



