Morphological and karyological variability of the Balkan endemics Moehringia jankae Griseb. ex Janka and Moehringia grisebachii Janka (Caryophyllaceae) from Eastern Balkan Range (Bulgaria)

Neli Grozeva1 Mariya Zhelyazkova2, Mariya Gerdzhikova3, Milena Tzanova4, Dimitar Pavlov3, Svetlana Georgieva2 and Dian Georgiev1

1 Trakia University, Faculty of Agriculture, Department of Biology and Aquаculture, Stara Zagora 6000, Bulgaria
2Trakia University, Faculty of Agriculture, Department of Genetics, Breeding and Reproduction, Stara Zagora 6000, Bulgaria
3Trakia University, Faculty of Agriculture, Department of Plant Production, Stara Zagora 6000, Bulgaria
4 Trakia University, Faculty of Agriculture, Department of Biochemistry, Microbiology and Physics, Stara Zagora 6000, Bulgaria

Grozeva, N., Zhelyazkova,M., Gerdzhikova, M., Tzanova, M., Pavlov, D., Georgieva, S. & Georgiev, D. (2020) Morphological and karyological variability of the Balkan endemics Moehringia jankae Griseb. ex Janka and Moehringia grisebachii Janka (Caryophyllaceae) from Eastern Balkan Range (Bulgaria). Bulg. J. Agric. Sci., 26 (Suppl. 1), 30-47

Seven populations of Moehringia jankae and eleven populations of M. grisebachii at Eastern Balkan Range – Sinite Kamani Natural Park were morphologically and karyologically tested. The chromosome numbers, the karyotype characteristics and the stomata type of M. grisebachii and M. jankae were described. Intrapopulation, interpopulation and interspecies variabilities were established. The chromosome number 2n = 2x = 24 have been found in all studied populations. The karyotypes of M. jankae and M. grisebachii consist of metacentric and submetacentric chromosomes, differences in morphology and size of chromosomes have been identified and in the studied populations of M. grisebachii were established one pair of chromosomes with satellites. The main source of phenotype variation was intrapopulation variability mainly due to characteristics of habitats of both species and their biological type. More variable in all populations of M. jankae and M. grisebachii were vegetative traits and the most variable was height of stem. The registered interpopulation variability was affected by the differences in the karyotype, the altitude, the exposure and the type of rock, number and area of population. Indumentum, dimentions of leaves and flowers and morphological features of pollen and seeds had taxonomic significance for distinguishing M. jankae from M. grisebachii.

Keywords: Moehringia grisebachii; Moehringia jankae; morphology; population variations

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