Abstract
SUMMARYThe chromosome number of nine species belonging to the genus Amara varies between 2n = 37 and 2n = 20, whereas six species of Zabrus have 2n = 57 —59. These genera show different patterns in karyotypic evolution: 37 or lower chromosome numbers, mediocentric chromosomes, and alternation of XO—XY systems are found in Amara, whereas in Zabrus the chromosome numbers are higher than 46, there are small subtelocentric pairs, and XO sex chromosomes predominate.
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