Correlation of compound autosome segregation and sex-chromosome disjunction in femaleLucilia cuprina(Wied.) (Diptera: Calliphoridae)

Abstract

SummaryInLucilia cuprina(Wiedemann) females, non-segregation of compound fifth-chromosomes is correlated with non-disjunction of theXchromosomes. Approximately two-thirds of eggs which inherit both maternal compound elements are nullo-X, suggesting that meiotic pairing betweenXchromosomes and compound autosomes has occurred. There was no evidence for pairing of the compounds and theXorYchromosome in males. A limited amount of data suggests that high non-segregation frequencies may occur in the offspring of putativeX/X/XandX/Ofemales. These results suggest the existence of non-homologous (distributive) pairing inL. cuprinafemales.