Factors affecting the frequencies of wild plant hybrids

The relationships between the frequencies of wild hybrids and certain properties of the parent species and the artificial F1 generation have been investigated from a survey of the literature. There appears to be no correlation between hybrid frequency and the life form of parent species, neither is there any correlation detected between hybrid frequency and the self compatability or otherwise of the parent species. There appears to be a weak correlation between hybrid frequency and the fertility of the artificial F1 generation; also between hybrid frequency and the level of ploidy of the parent species; but neither of these correlations is statistically significant