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Chromosomal evolution in Cervidae.

F Fontana1, M Rubini

  • 1Institute of Zoology, Faculty of Sciences, Ferrara, Italy.

Bio Systems
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

Karyosystematic analysis of Cervidae reveals three main evolutionary branches based on chromosome rearrangements. The Muntiacinae subfamily shows the highest chromosomal diversity, while Moschinae may warrant separate family classification.

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Area of Science:

  • Karyosystematics
  • Evolutionary Biology
  • Mammalian Cytogenetics

Background:

  • The Cervidae family exhibits diverse karyotypes, suggesting significant chromosomal evolution.
  • Understanding chromosome number and structure is crucial for resolving phylogenetic relationships within deer species.

Purpose of the Study:

  • To investigate the karyosystematics of the Cervidae family.
  • To infer the primitive karyotype and trace chromosomal rearrangements during deer evolution.
  • To clarify the phylogenetic positions of subfamilies and genera within Cervidae.

Main Methods:

  • Karyotype analysis based on chromosome data from 30 species and 20 subspecies of Cervidae.
  • Comparative analysis of chromosome number (2n) and fundamental number (FN) across different taxa.

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  • Identification and classification of chromosome rearrangement types, including centric fusions, pericentric inversions, and tandem fusions.

    • Main Results:

    • The primitive Cervidae karyotype is inferred to be 2n=70, FN=70.
    • Three main karyological branches were identified: Cervinae (2n=68, FN=70), Odocoileinae (2n=70, FN=74), and Muntiacinae (highly variable, e.g., 2n=46, FN=46 to 2n=6 in females).
    • Muntiacinae exhibits the greatest chromosomal diversity, while Cervinae and Odocoileinae show conserved karyotypes.
    • Karyological data for Moschus berezovskii suggest its placement in a separate family, Moschidae.

    Conclusions:

    • Chromosomal rearrangements have played a significant role in the diversification of Cervidae.
    • The karyological data support the distinct evolutionary paths of Cervinae, Odocoileinae, and Muntiacinae.
    • The subfamily Muntiacinae is the most chromosomally diversified group within Cervidae.