Karyological study of Balkan endemics Moehringia jankae Griseb. ex Janka and Moehringia grisebachii Janka (Caryophyllaceae) in Bulgaria

Mariya Zhelyazkova1 Neli Grozeva2 and Svetlana Georgieva1

1Trakia University, Faculty of Agriculture, Department of Genetics, Breeding and Reproduction, Stara Zagora 6000, Bulgaria
2Trakia University, Faculty of Agriculture, Department of Biology and Aquaculture, Stara Zagora 6000, Bulgaria

Zhelyazkova, M., Grozeva, N. & Georgieva, S. (2020) Karyological study of Balkan endemics Moehringia jankae Griseb. ex Janka and Moehringia grisebachii Janka (Caryophyllaceae) in Bulgaria. Bulg. J. Agric. Sci., 26 (Suppl. 1), 58-71

The study presents the somatic chromosome number of Moehringia jankae 2n = 24, and confirms the one for Moehringia grisebachii 2n = 24. The karyotype morphology of ten populations of the two species were described in detail. Karyotype variability was registered for M. jankae (Hcl = 17.99 - 37.58) and M. grisebachii (Hcl = 15.30 - 36.63), while the chromosome analysis showed mainly metacentric and submetacentric chromosomes for both species. Five different karyotype formulae were registered for all studied populations. Based on the calculated values of Mca (0.46 - 1.34 and 0.55 - 1.21), A1 (0.117 - 0.141 and 0.117 - 0.217), TF% (41.97 - 47.26 and 42.76 - 46.73) and Ask% (52.74 - 58.03 and 53.27 - 57.24), it was determined that the karyotype of M. jankae and M.grisebachii is symmetric. The chromosome number of M. jankae is announced for the first time.

Keywords: Moehringia jankae; Moehringia grisebachii; chromosome; karyotype; endemic plant species

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