| Autor: |
Banaev, Evgeny V., Tomoshevich, Maria A., Erst, Anna A. |
| Zdroj: |
Genetic Resources & Crop Evolution; Aug2024, Vol. 71 Issue 6, p2843-2858, 16p |
| Abstrakt: |
For the first time, nuclear genome size and ploidy of five Nitraria species from 49 populations were examined by flow cytometry. All populations were also analyzed for the chromosome number. We identified significant differences in the 2C nuclear DNA content among the analyzed species, and this parameter correlated with their ploidy. Diploid (2n = 2x = 24) species N. sibirica and N. tangutorum were found to have smaller genome size (1.24–1.34 and 1.57–1.65 pg) as compared to tetraploid (2n = 4x = 48) species N. komarovii (2.23–2.32 pg), N. pamirica (3.10–3.30 pg), and N. schoberi (2.93–3.39 pg). Intra-population genome size variation was found in examined species, varying from 1.01 to 1.08-fold. Nitraria sibirica has lower inter-population variation of the 2C (1.08-fold) as compared to N. schoberi (1.16-fold). All the Nitraria species are mixoploids. It turned out that an increase in the equatorial axis of Nitraria pollen is associated with an increase in 2C and 1Cx. An exception is N. komarovii, with its intermediate 2C DNA content and the smallest pollen grains. In general, our data confirm Bobrov's previous views on the system of the genus Nitraria, which distinguished ser. Sibiricae and ser. Schoberianae in sect. Nitraria. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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