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Meiosis in Persian leek Allium ampeloprasum ssp. persicum

Panahandeh, J.
Acta horticulturae 2016 no.1143 pp. 23-26
Allium ampeloprasum, anaphase, autotetraploidy, chiasmata, chromosome pairing, crops, direct seeding, horticulture, leeks, meiosis, natural selection, planting, spores, Iran
Allium ampeloprasum is a variable species with some botanical groups or subspecies. One of these groups is Persian leek (tarre irani) which is cultivated in Iran and consumed as a green and potherbs. Like the leek Persian leek is a tetraploid and seed propagated vegetables. Leek has been the subjects of some cytogenetical studies and accordingly considered as autotetraploid species. In this study meiosis were studied in Persian leek. Results showed that in metataphase one the predominant chromosome pairing was cross shaped bivalent due to localized chiasmata but some polyvalent as well as univalent were also observed. Anaphase one mostly was regular and in rare events there are laggard or bridge chromosomes. Second division also mostly was regular. At sporard stage there is mainly normal tetrad but interestingly in some spores there were interior micronuclei. Based on the results Persian leek had less meiotic irregularity than that has been reported for leek (A. ampeloprasum ssp. porrum). These may be related with different planting system of these two closely related crops, leek planted as transplanting in which may be selection were made based on horticultural attributes but Persian leek planted as direct seeding so it may was under the natural selection against the meiotic irregularity that could reduce the fertility.