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Extent of recombination possible in the cultivated leek

Extent of recombination possible in the cultivated leek

3rd Eucarpia Allium symposium, Wageningen, 4-6 September 1984: 99-105

In a survey of work on leek and its allied species, it is noted that (1) in Allium ampeloprasum the chiasmata are localized on either side of the centromere, resulting in the formation of cruciform bivalents at metaphase I; (2) in A. porrum, A. kurrat and A. ampeloprasum subsp. ampeloprasum, but not in A. ampeloprasum subsp. truncatum, meiosis is characterized by proximal chiasmata; and (3) cultivated types of the 3 species are tetraploid, with 2n = 4x = 32, showing tetrasomic inheritance for most characters. It is concluded that recombination potential is restricted by the position of the chiasmata and tetrasomic inheritance.

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