structural:summarization
Cultivars

Over the centuries, numerous durian cultivars, propagated by vegetative clones, have arisen in Southeast Asia. They used to be grown, with mixed results, from seeds of trees bearing superior quality fruit, but now are propagated by layering, marcotting, or more commonly, grafting, including bud, veneer, wedge, whip and U-grafting, onto seedlings of randomly selected rootstocks. Different cultivars may be distinguished to some extent by variations in the fruit shape, such as the shape of the spines.