Outcrossing Rates of Six Common Bean Lines
- W. C. Wells ,
- W. H. Isom and
- J. G. Waines
The outcrossing rate of a species is an important parameter to consider when making a decision on the method to improve the species. Outcrossing rates were estimated for six white-seeded common bean (Phaseolus vulgaris L.) lines sown in May and July 1985, at Irvine, CA. Estimates were based upon the proportion of black-seeded (dominant) progeny from white-seeded parents. Genetic variation for outcrossing rates among the six lines studied was suggested by the large difference between the mean estimate for ‘FM 53’ (66.8%) and the combined mean estimate for the other five lines (19.3%). Outcrosses occurred less frequently at the early planting date (18.8%) than at the late-planting date (47.0%). Further studies on the outcrossing in the common bean and its application to recurrent selection are warranted in light of the reported results.
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