By Ernst Mayr (auth.), Kurt Benirschke (eds.)
Ten years in the past a symposium on Cytotaxonomy 'was held in London (Proc. Linn. Soc. Lond. 169:110, 1958) during which a primary test was once made to collect a variety of disciplines to debate advances of mammalian cytogenetics and to place them into right context with the sciences of evolution and taxonomy. The introductory feedback via \V. B. Turrill to that symposium, basically an admonishment to be tolerant of the quick comings of our respective disciplines, will be a splendid commence ning to this convention as ,,'ell. although, the assembly held at Hanover was once conceived extra alongside the traces of feedback made through R. B. Seymour Se,,'ell in his presidential tackle to a similar society: "It has been stated that scientists during this look for fact are these days an excessive amount of focused on the buildup of proof, and make too little use in their imagina tion of their makes an attempt to give an explanation for such proof as they've got gathered. " (In "The continental go with the flow thought and the distribution of the Copepoda," ibid. 166:149, 1956. ) \\Tith this as a history, years in the past we held the 1st of a chain of loosely-structured meetings on reproductive failure within the stress-free surroundings of this small New England collage neighborhood. The manu scripts of that assembly were released (Comparative points of Re effective Failure, Springer-Verlag big apple Inc. , 1967).
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Additional info for Comparative Mammalian Cytogenetics: An International Conference at Dartmouth Medical School Hanover, New Hampshire, July 29—August 2, 1968
The standard checklist of Pale arctic mammals recognizes two species, while a third has been kept with considerable hesitation (Ellerman and MorrisonScott, 1951). About ten years ago it was found that individuals of mole rats from 30 Chromosome Forms in a Subterranean Rodent J1 Israel, indistinguishable morphologically and classified as the southeastern Mediterranean species Spalax chrcnbcrgi Nehring 1898, differ in their karyotypes. Moreover, animals trapped in one locality, Sa'ar in western Upper Galilee, showed a difference of as many as 6 chromosomes (Wahrman, 1958).
Sharman: Chromosome polymorphism in the common shrew. Nature 180:392, 1957. , I. Gustavsson, M. Hulten, M. J. Lindsten and L. ). Cytogenetics 7:196, 1968. Galton, M. and S. F. Holt: DNA replication patterns of the sex chromosomes in somatic cells of the Syrian hamster. Cytogenetics 3 :97, 1964. , J. Noades, P. Tippett, R. Sanger and R. R. Race: Blood group antigen Xg (a) in gibbons. Nature 204:1322, 1964. Hayman, D. L. and P. G. Martin: An autoradiographic study of DNA synthesis in the sex chromosomes of two marsupials with an XX/XY 1Y2 sex chromosome mechanism.
G. ~ So ~ f ':"" Q\ '" 16 16 58 60 59t Samaria 20 20 20 20 20 A 1 2 8 6 M 8 8 16 14 2 A 8 8 6 M Group C Inversion Chromosomes 12 4 A Group B Robertsonian Chromosomes 17 16 18 32 28 M 42 44 40 20 26 A 76 76 76 84 82 Arms actual Total 76 76 76 76 76 Arms corrected" "Metacentric chromosomes of group C, thought to have arisen through periccntric inversions, are counted as if they were one. armed elements t Hybrid between 58 and 60. 16 16 16 52 54 Upper Galilee Golan Lower Galilee, Cell tra1 Israel Samaria, Judea, Negev M 2n Region Group A Unchanged Chromosomes Table I: A Breakdown of Chromosome Types of the Different Forms of Spalax Described in the Present Paper The classification refers to females; the Y chromosome is omitted.
Comparative Mammalian Cytogenetics: An International Conference at Dartmouth Medical School Hanover, New Hampshire, July 29—August 2, 1968 by Ernst Mayr (auth.), Kurt Benirschke (eds.)