Fertility variation in Milletia stuhlmannii, Brachystegia spiciformis, Brachystegia bohemii and Leucaena leucocephala and its effects on relatedness in seeds
Bila, A.D.; Lindgren, D.
Forest Genetics 5(2): 119-129
Variation in seed production was studied in five stands in Mozambique. It was possible to describe the distribution of seed set as a power function y = xa, where y is the accumulative seeds production, x is the ranked proportion of trees contributing and a a parameter that cannot be less than one. For the studied populations, a = 2.36, 2.45, 3.10, 4.12 and 4.72: this range seems to be in general agreement with data reported by other investigations. The parameter a increased with increasing variation in fertility within stands. The degree of relatedness expected in a seed crop could also be expressed with the status (effective) number relative to the number of investigated trees, that was 0.67, 0.65, 0.54, 0.43 and 0.38, respectively.