CONDITIONS AFFECTING GROWTH II 



were made of the racial hybrids. All beans repro- 

 duced showed little variation in the first generation 

 but pronounced variation in the second and third 

 generations and appeared fairly well fixed in 

 the fourth and fifth. The characters of the two 

 parents were usually reproduced in the hybrids, 

 though occasionally new or atavistic tendencies 

 were observable. When green and yellow podded 

 races were crossed, the first generation hybrids had 

 green pods, yellow and intermediate colors not 

 appearing until later generations. When semi- 

 dwarfs and dwarfs were crossed, the first generation 

 hybrids were all semi-dwarfs, strictly dwarf not 

 appearing until the second generation. 



