Breeding systems in Angiosperms: novel inferences from a new analytical approach

摘要: A novel analytical approach to classify breeding systems in Angiosperms combining statistical and conceptual criteria is proposed, which will allow describe compare available mating system data an unified form. Four indexes (BSI) were combined: Index of Agamospermy, Spontaneous Self-Pollination (ISSP), Self-Fertility (ISF), Self-incompatibility. Their values, ranging from 0 ∞, analyzed using t tests discriminate experimental index values 1.0. For each index, five discrete categories described. The composite the four BSI assigned a species represents integrated characterization its reproductive system. magnitude measure (M) describes strength species. Indexes inbreeding outbreeding depression also examined for Published 1908 taxa used determine systems. Frequencies across entire set determined. Non-agamospermous dominated. Non-spontaneous self-pollinating xenogamous most frequent observed ISSP ISF indexes, respectively. largest group was partially self-incompatible. Actual number inferred based on our analysis small fraction (8.9 %) all mathematically possible ones. Similarly, combinations between results obtained pollination estimates natural efficiency only 22.1 % combinations. Within Angiosperms, there marked trend toward evolution partial self-incompatibility with significant depression.