ISHS Acta Horticulturae 1315: I International Conference and X National Horticultural Science Congress of Iran (IrHC2017)
Karyotype analysis in diploid and polyploid species of Iranian wild asparagus |
| Authors: | S.J. Mousavizadeh, M.R. Hassandokht, A. Kashi |
| Keywords: | asparagus, chromosome, metacentric, submetacentric, karyotype |
| DOI: | 10.17660/ActaHortic.2021.1315.22 |
| Abstract:
Asparagus is a genus in the family Asparagaceae, with a basic chromosome number of x=10 (2n=2x=20), and different ploidy levels have been recognized in asparagus plants. In this respect, the karyotype analysis in some ploidy asparagus remains. In this experiment, a karyotype study was performed in diploid and polyploidy asparagus in Iran. Seeds of six wild asparagus accessions belonging to four Asparagus species include A. officinalis L., A. persicus Baker., A. verticillatus L., and A. breslerianus were collected from natural zones of Iran. The chromosomes were prepared and arranged in decreasing lengths and paired according to arm ratio. According to results, the karyotypic formula consists exclusively of metacentric (m) and submetacentric (sm) chromosomes. The karyotype formula was 8m+12sm for Asparagus officinalis (2x), 30m+10sm for A. officinalis (4x), 56m+24sm for A. officinalis (8x), 12m+8sm for A. persicus (2x), 14m+6sm for A. verticillatus (2x), 56m+24sm for A. breslerianus (8x). Smallest (2.625 µm) and longest (4.199 µm) chromosome lengths were obtained in A. breslerianus and A. persicus, respectively. The results demonstrated karyotypic and chromosomal diversity among diploid and ploidic wild asparagus, which is useful in the study of Asparagus genus evolution. | |
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