44 



GENETICS 



MUTANTS or CENOTHERA LAMARCKIANA 



The seeds in each generation were self-fertilized 

 lamarMana. 



The mutant gig as occurred once, in 1895. From 

 the seeds of this one plant were produced 450 true 

 gigas offspring in the first year, and the strain con- 

 tinues to breed true. 



Albida was first noted in 1895, but deVries remem- 

 bered having seen it before and dismissing it as 

 pathological. Because of its poverty in chlorophyll it 

 is a mutant which probably would not maintain itself 

 successfully in nature, but it breeds constant under 

 cultivation. 



Oblonga always bred true with the exception of 

 throwing an albida in 1895 and a single example of 

 rubrinervis in 1899. 



Of rubrinervis over 2000 invariably bred true, while 

 nanella bred true in over 20,000 offspring, with but 

 three exceptions when oblonga characters appeared. 



