Family outcrossing rates of Pinus caribaea var. caribaea populations that differed in origin and management were estimated by using isozyme markers. The family outcrossing rates were estimated by (1)fixing the probability of pollen gene frequency (p); (2) allowing pollen gene frequency to vary among families. The estimates of family outcrossing rates for all the populations varied widely among families (clones of the seed orchard), ranging from 0.39 to 2.0. The average family outcrossing rates of both methods were greater than the Family outcrossing rates of Pinus caribaea var. Caribaea populations that differed in origin and management were estimated by using isozyme markers. The family outcrossing rates were estimated by (1) fixing the probability of pollen gene frequency (p); (2) allowing pollen gene frequency to vary among families. The average family outcrossing rates of both methods were greater than the