Abstract
The following note is concerned solely with the behaviour of certain characters in hybrid barleys which bear on the inheritance of sterility and the question whether sex is, as it seems possible, a phenomenon of gametic segregation. I have used the term “sterility” in a broader sense than usual to include cases in which certain florets set no grain owing to the suppression of either the female or both the male and female reproductive organs. The plants themselves are in no cases completely sterile. The other characters occurring in the numerous varieties of barley will be considered in detail later.

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