An interspecific hybrid plant derived from a cross between an Allium ampeloprasum plant and an Allium sativum plant, wherein said interspecific hybrid plant is capable of producing seed, wherein said interspecific hybrid plant is heterozygous in its genome for at least 50 markers selected from the sequences of SEQ ID NO:
- 1 to SEQ ID NO:
- 65, each of the at least 50 markers comprising a garlic-leek interspecific single nucleotide polymorphism (SNP), wherein said interspecific hybrid plant contains at least 250 mg/kg of allicin when determined in a white part of a leaf sheet of the plant, and wherein said interspecific hybrid plant is grown from a seed of an interspecific hybrid plant as deposited under accession number NCIMB 42564.