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Allium sp.
Exact specie find in commercial crop is tough now. Need to check which seeds used by farmer. Its a commercial cultivar.
I have provided a scientific name for you with a reference link. The reference link could help lead you to a specific species, for I have only narrowed it down as far a genus.
It could possibly be Allium aflatunense, but that species is confused with many others.
http://en.wikipedia.org/wiki/Allium_afla...