Karyotype variations in Italian populations of the peach-potato aphid Myzus persicae (Hemiptera: Aphididae).
In this study, we present cytogenetic data regarding 66 Myzus persicae strains collected in different regions of Italy. Together with the most common 2n = 12 karyotype, the results showed different chromosomal rearrangements: 2n = 12 with A1-3 reciprocal translocation, 2n = 13 with A1-3 reciprocal translocation and A3 fission, 2n = 13 with A3 fission, 2n = 13 with A4 fission, 2n = 14 with X and A3 fissions. A 2n = 12-13 chromosomal mosaicism has also been observed. Chromosomal aberrations (and in particular all strains showing A1-3 reciprocal translocation) are especially frequent in strains collected on tobacco plants, and we suggest that a clastogenic effect of nicotine, further benefited by the holocentric nature of aphid chromosomes, could be at the basis of the observed phenomenon.
Dipartimento di Scienze Agrarie e degli Alimenti, Università di Modena e Reggio Emilia, Italy.
M
M
Rivi
V
V
Monti
E
E
Mazzoni
S
S
Cassanelli
M
M
Panini
D
D
Bizzaro
M
M
Mandrioli
G C
GC
Manicardi
D000818:Animals; D001042:Aphids / Q000235:genetics*; D059006:Chromosomes, Insect; D018556:Crops, Agricultural; D005260:Female; D007558:Italy; D059785:Karyotype; D008297:Male; D014178:Translocation, Genetic