In this paper we describe the karyotypes of two aphid species, Tetraneurella akinire and Anoecia nemoralis, found on the roots of Graminacee. Karyotype analysis in T. akinire have shown variations in chromosome number which are discussed in relation to the evolution of aphid karyotypes. Moreover, we estimated the DNA content in somatic cells of both species. Since emission values observed in mitotic plates of T. akinire with 14-15-16 chromosomes were completely overlapping, we can conclude that these karyotype variations are solely due to chromosome fragmentation.
KARYOTYPE ANALYSIS AND DNA CONTENT IN 2 SPECIES OF ROOT APHIDS / Gautam, Dc; Bizzaro, D; Manicardi, Gian Carlo. - In: CARYOLOGIA. - ISSN 0008-7114. - STAMPA. - 46:(1993), pp. 209-217.