Explanation

Jones and Davies (1944) is correct because they are credited with the first discovery of cytoplasmic genetic male sterility. Devaries and Correns (1900) is incorrect as their work did not focus on this specific type of sterility. Bruce and Keeble (1908) is incorrect because their research was not related to the initial finding of this trait. Nilson (1900) is incorrect because he is not credited with the first discovery of cytoplasmic genetic male sterility.