Male sterility in field beans (Vicia faba L.). II. Yield trials of F1 hybrid winter beans produced with the aid of male sterility

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Abstract
1. F1 hybrids between inbred lines of winter beans were obtained by roguing male-fertile plants from segregating progenies of a genetic male-sterile line which had been interplanted with a pollinator.2. In a series of trials the mean yields of many hybrids were significantly higher than those of open-pollinated varieties. Over the 4 years, 1959–62, with trials at three centres in each year, the mean advantages of all hybrids over the two control varieties was 6·4 cwt./acre over Gartons S.Q., 4·7 cwt./acre over Throws M.S.