"Why Polyploidy is Rarer in Animals Than in Plants" Revisited

No satisfactory explanation of the rarity of polyploidy among animals exists. In taxa possessing a degenerate Y chromosome, polyploid speciation invariably disrupts the balance of X to autosomal gene product normally maintained by dosage compensation. This dosage balance is upset whether or not sex determination is disrupted. This factor may explain the distribution of polyploidy across taxa. In particular, plants may commonly show polyploidy because degenerate sex chromosomes are rare (first, because dioecy is rare, and second, because extreme Y degeneracy is rare among dioecious plants). Animals may rarely show polyploidy because degenerate sex chromosomes are common. Several predictions are discussed.

[1]  P. Baverstock,et al.  A sex-linked enzyme in birds—Z-chromosome conservation but no dosage compensation , 1982, Nature.

[2]  Michael S. Johnson,et al.  Absence of dosage compensation for a sex-linked enzyme in butterflies (Heliconius)4 , 1979, Heredity.

[3]  J. Lucchesi.  Gene dosage compensation and the evolution of sex chromosomes. , 1978, Science.

[4]  B. Charlesworth.  Model for evolution of Y chromosomes and dosage compensation. , 1978, Proceedings of the National Academy of Sciences of the United States of America.

[5]  R. C. Jackson.  Evolution and Systematic Significance of Polyploidy , 1976 .

[6]  D. G. Lloyd,et al.  Female-predominant sex ratios in angiosperms , 1974, Heredity.

[7]  R. Barrera.  [Introduction to human genetics]. , 1969, Revista medica de Chile.

[8]  C. Pigott.  Genetics and the Origin of Species , 1959, Nature.

[9]  L. B. Russell,et al.  THE Y-CHROMOSOME AS THE BEARER OF MALE DETERMINING FACTORS IN THE MOUSE. , 1959, Proceedings of the National Academy of Sciences of the United States of America.

[10]  C. Waddington,et al.  “Animal Cytology and Evolution” , 1955, Nature.

[11]  A. Sturtevant,et al.  THE HISTORY OF GENETICS , 1954 .

[12]  C. D. Darlington,et al.  Polyploidy in Animals , 1953, Nature.

[13]  G. Ledyard Stebbins,et al.  Variation and Evolution in Plants , 1951 .

[14]  J. Haldane,et al.  The Part Played by Recurrent Mutation in Evolution , 1933, The American Naturalist.

[15]  H. Muller.  Why Polyploidy is Rarer in Animals Than in Plants , 1925, The American Naturalist.

[16]  C. Bridges.  Sex in Relation to Chromosomes and Genes , 1925, The American Naturalist.

[17]  B. Meyer,et al.  Genes that implement the hermaphrodite mode of dosage compensation in Caenorhabditis elegans. , 1989, Genetics.

[18]  H. Kobel,et al.  Genetics of polyploid Xenopus , 1986 .

[19]  B. S. Baker,et al.  Sex determination and dosage compensation in Drosophila melanogaster. , 1983, Annual review of genetics.

[20]  J. Bull.  Evolution of sex determining mechanisms , 1983 .

[21]  M. Kuroda,et al.  Dosage compensation in Drosophila. , 1983, Isozymes.

[22]  W. Lewis.  Polyploidy : biological relevance , 1980 .

[23]  A. Saura,et al.  Polyploidy in insect evolution. , 1979, Basic life sciences.

[24]  J. Dewet,et al.  Origins of polyploids. , 1979, Basic life sciences.

[25]  P. Barlow.  Sex Chromosomes , 1967, Nature.

[26]  M. Westergaard.  The mechanism of sex determination in dioecious flowering plants. , 1958, Advances in genetics.

[27]  M. Westergaard,et al.  Studies on cytology and sex determination in polyploid forms of Melandrium album , 1940 .

[28]  F. Wettstein.  Die Erscheinung der Heteroploidie, besonders im Pflanzenreich , 1927 .