Karyotype of five <i>Astragalus</i> species from the alpine subnival belt in the Hengduan Mountains

Zhang Jie-Yu; Zhang Zi-Qi; Zhou Wei; Sun Wen-Guang; Li Zhi-Min

doi:10.11913/PSJ.2095-0837.22097

Plant Science Journal > 2023 > 41(1): 63-69. > DOI: 10.11913/PSJ.2095-0837.22097 CSTR: 32231.14.PSJ.2095-0837.22097

Zhang JY，Zhang ZQ，Zhou W，Sun WG，Li ZM. Karyotype of five Astragalus species from the alpine subnival belt in the Hengduan Mountains[J]. Plant Science Journal，2023，41（1）：63−69. DOI: 10.11913/PSJ.2095-0837.22097

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Karyotype of five Astragalus species from the alpine subnival belt in the Hengduan Mountains

Zhang Jie-Yu^{1, 2,},
Zhang Zi-Qi¹,
Zhou Wei¹,
Sun Wen-Guang^{1, 2, ,},
Li Zhi-Min^{1, 2, ,}

1.
School of Life Science, Yunnan Normal University, Kunming 650500
2.
Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Yunnan Normal University, Kunming 650500, China

Funds: This work was supported by grants from the National Natural Science Foundation of China (31960046), Key Projects of the Joint Fund of the National Natural Science Foundation of China (U1802232), Second Tibetan Plateau Scientific Expedition and Research (STEP) Program (2019QZKK0502), and Youth Project of Basic Research in Yunnan Province (202201AU070057)

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Received Date: July 24, 2022
Revised Date: September 11, 2022
Available Online: March 02, 2023

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Abstract

Abstract

The chromosome numbers and karyotypes of five species of Astragalus (Fabaceae) collected from the alpine subnival belt in the Hengduan Mountains were determined. All species were analyzed by conventional staining and pressing methods. The karyotype formulae of the five species are reported for the first time. Results showed that: A. craibianus Simps., A. acaulis Baker, A. ernestii Comb., A. tongolensis Ulbr. were diploid, while A. degensis Ulbr. was tetraploid. The chromosome base number for all studied species was x = 8. The karyotype formula of A. craibianus was 2n = 2x = 16 = 6sm + 10m, 2A. The karyotype formula of A. acaulis was 2n = 2x = 16 = 2sm + 14m, 2A. The karyotype formula of A. ernestii was 2n = 2x = 16 = 2sm + 14m, 2A. The karyotype formula of A. degensis was 2n = 4x = 32 = 4sm + 28m, 1A. The karyotype formula of A. tongolensis was 2n = 2x = 16 = 2st + 2sm + 12m, 2A. All species of Astragalus in the Hengduan Mountains were previously reported to be diploid, but this study discovered a tetraploid species for the first time. These results not only expand basic information on the chromosomes of legumes in the alpine subnival belt of the Hengduan Mountains, but also provide a cytological reference for the study of plant phylogeny and evolution of plants within Astragalus in this region.
- Hengduan Mountains,
- Astragalus,
- Chromosome number,
- Karyotype analysis

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References (31)

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Karyotype of five Astragalus species from the alpine subnival belt in the Hengduan Mountains