Характер кариотипической изменчивости в популяциях некоторых видов Chondrilla

Abstract

Karyotypic variability of plants in 17 populations of Chondrilla ambigua Fisch., Ch. brevirostris Fisch. et Mey., Ch. laticoronata Leonova. Ch. canescens Kar. & Kir., Ch. juncea and Ch. pauciflora Ledeb. from Astrakhan, Voronezh and Saratov regions, the Republic of Kalmykia and Western Kazakhstan is investigated. It is shown that the form of Ch. ambigua is a strict diploids (2n = 2x = 10), while a closer look Ch. pauciflora is a strict triploid (2n = 3x = 15). Part of the plants Ch. juncea proved diploid, and part of tetraploid. Plants Ch. canescens for the most part were triploidy, but about 10 % diploids. Plants Ch. latiocoronata regardless of the collection site were triploid, only in one population of birds was pentaploid. From Ch. brevirostris, Ch. canescens, Ch. juncea and Ch. laticoronata revealed a large proportion of aneu- and mixoploids.