‘Despite the costs of inbreeding depression, self-fertility has evolved repeatedly in diverse taxa of flowering plants.’
‘Plants also show great ranges in self-fertility from obligate outcrossing to complete selfing to apomixis (uniparental).’
‘Perhaps the mutation that results in self-fertility arrived as a seed dispersed into the eastern half of the population, and not enough time has passed for it to spread or be lost.’
‘Apart from inbreeding depression, several ecological and environmental factors, e.g. pollen limitation and lower resource costs of selfing, may cause variation in the amount of self-fertility.’
‘Several recent studies have found substantial variation in self-fertility among individuals, populations, and cultivars of certain plant species.’
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