pnut pnut Peanut Science 0095-3679 0095-3679 American Peanut Research and Education Society 10.3146/i0095-3679-3-2-3 Articles Hybridization of Peanuts in Growth Chambers1 D. J. Banks 2 Research Geneticist, Southern Region, ARS, USDA, and Associate Professor of Agronomy, Oklahoma Agricultural Experiment Station, Stillwater, Oklahoma 74074

1Cooperative investigations of the Southern Region, Agricultural Research Service, U.S. Department of Agriculture, and the Oklahoma Agricultural Experiment Station, Oklahoma State University, Stillwater, Oklahoma 74074. Journal Article No. 3088. Oklahoma Agricultural Experiment Station.

 7 1976 7 1976 3 2 66 69 American Peanut Research and Education Society 1976 American Peanut Research and Education Society Abstract

Hand crosses in peanuts require much time and generally are done by emasculating the flowers late in the evening or at night, and then pollinating the plant the next morning when pollen is available. A new method, in which a growth chamber is operated on a reversed day-night schedule (12-hour, 29 C day commencing at 4:30 p.m. and 12-hour, 21 C night commencing at 4:30 a.m. CST), allows the emasculations to be made between 8:00 and 10:00 a.m. and the pollinations to follow immediately. This method permits crossing to be done during normal work-day hours and allows up to three crossing cycles and growth generations per year. In 1971 and 1972 tests of this method showed more than 50% success in achieving viable hybrids per pollination.

 Additional index Words Arachis hypogaea; , Emasculation; , Genetic markers; , Groundnuts; , Hybrids; , Pollination; , Seed dormancy