“…All of them could be distinguished, although the branches were not clearly defined according to relevant onion characteristics, such as pungency, day length requirements, and skin colour (Table 1). These Spanish onion landraces were clustered by their morphological and physico-chemical characteristics in our earlier study (Mallor et al, 2011), however a clear relation among molecular and morphological/physico-chemical clusters has not proven to be clearly established. A similar result has been reported by Khar et al (2011) for Indian onions in which the clustering was not made on the basis of colour, growing season or geographical origin.…”