No. 566] INHERITANCE IN EARS OF MAIZE 91 



that are heterozygous and therefore produce progenies of 

 green and variegated individuals in a ratio of approxi- 

 mately 3 to 1. Correns points out that a green branch of 

 a variegated plant behaves as though it belonged not to a 

 variegated plant at all, but to a hybrid between a varie- 

 gated plant and a green one, in which green is dominant, 

 and that half of the germ cells produced by the green 

 branch carry a factor for green and the other half a factor 

 for variegation. Similar results were secured from 

 branches with self-colored flowers on plants with striped 

 flowers, except that such branches produce few if any 

 more self-colored plants than are produced by branches 

 with striped flowers. Plants with self-colored flowers, no 

 matter how they arise, behave as they would if they had 

 occurred in an F 2 progeny of a cross of striped by self- 

 colored plants. 



Eesults of Experiments with Maize 

 Hartley 4 in 1902 gave an account of an experiment with 

 variegated maize. In a comparatively pure white strain, 

 which occasionally produced a red ear, there was found an 

 ear similar to some of the " freak" ears noted earlier in 

 this paper. It is described as being red except for a spot 

 covering about one fifth of the surface, in which the grains 

 were white with fine red streaks. The excellent plate ac- 

 companying the account, however, shows that most of the 

 "red" grains had white streaks at the crown and that the 

 cob was light-colored, not red. From the near-red grains 

 of this ear there was produced a crop of 84 red ears and 

 86 pure white ones, while from the variegated grains of 

 the same ear there came 39 light variegated ears and 36 

 white ones. Hartley refers to the parent ear asa" sport 

 or sudden variation from the type" but does not indicate 

 whether the "t ype" in mind was the white variety or the 

 red ears occasionally produced by it. Both the color of 

 the grains and cob and the production of about 50 per 

 cent, of white ears from both the red and the variegated 

 grains indicate very clearly that the parent ear was a 



* Hartley, C. P., Yearbook, U. S. Dept. Agr., 1902: 543-544. 



