Genetica

, Volume 60, Issue 2, pp 139–150 | Cite as

Chromosomal analysis of Leptinotarsa and Labidomera species (Coleoptera: Chrysomelidae)

  • T. H. Hsiao
  • C. Hsiao
Article

Abstract

Chromosomes were examined from 13 Leptinotarsa species: L. decemlineata, L. texana, L. defecta, L. juncta, L. rubiginosa, L. haldemani, L. tumamoca, L. peninsularis, L. behrensi, L. heydeni, L. lineolata, L. typographica, and L. undecimlineata. With the exception of L. undecimlineata, which has 2n=32+XO, all other species have the basic chromosome number 2n=34+XO. Of two Labidomera species also examined, L. clivicollis has 2n=32+XO and L. suturella has 2n=30+XO. Idiograms showed that the majority of the autosomes are submetacentric. All species have a large submetacentric X chromosome. Meiotic pairings were regular with both closed and open bivalents. Chiasma frequencies varied considerably among species and even between populations. No distinct correlation was evident when chromosome numbers and chiasma frequencies were compared with host plant association and geographic distribution patterns of Leptinotarsa species.

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Copyright information

© Dr W. Junk Publishers 1983

Authors and Affiliations

  • T. H. Hsiao
    • 1
  • C. Hsiao
    • 1
  1. 1.Department of BiologyUtah State UniversityLoganUSA

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