J. P. Lotsy

Evolution by Means of Hybridization

• Broschiertes Buch

Produktbeschreibung

As aPreface is in reality a Postscriptum, the author may be permitted to open it by mentioning omissions. The chief sin of omission he committed, is evidently the insuffident justice he did to the writings of Anton Kerner von Marilaun, who was - he wants to state this explicitly - the first to recognize fully the significance of crossing as the underlying cause of the origin of spedes. What else should apreface say? If the work is as condensed as the present one, it may perhaps suffise to repeat what Linnaeus said to Haller: Si quos in me vidisti errores, Tu sapientior haec ignoscas. . .. Quos plures apud me detegere potes, eo gratior ero, tum possum omnia corrigere vivus; post mortem non licet emendare propria opuscula. By which however the author does not consider himself bound to gratefulness for every kind of critidsm. He is f. i. very little impressed by the kind of criticism which calls it "inconceivable" "verging on the absurd" etc., to believe that crossing can ever have been the underlying cause of the origin of new spedes, from authors who firmly believe that the origin of new spedes should be ascribed to some kind of variability; because it seems to him "absurd" that those who advocate the origin of new spedes from a single ances tral one, should reproach an author who defends such an origin from two ancestral species, of stating an "inconceivable" opinion.

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Produktdetails

• Verlag: Springer Netherlands / Springer, Berlin
• Softcover reprint of the original 1st ed. 1916
• Seitenzahl: 176
• Erscheinungstermin: 1. Januar 1916
• Englisch
• Abmessung: 235mm x 155mm x 10mm
• Gewicht: 276g
• ISBN-13: 9789401183819
• ISBN-10: 9401183813
• Artikelnr.: 39620019

Inhaltsangabe

What is Evolution?.- The Evolution of Living Beings.- Definitions of Terms Used.- Do Diploid Species vary?.- Species, Linneons, Genera and other "Higher Groups" and Evolution.- The Origin of Diploid Species.- The Perpetuation of the New Species.- How to get at the Constitution of the Gametes.- How can Groups of Differently Constituted Types Form a Linneon, Simulating a Species?.- The Limits of Linneons.- The cause of the Increase of "Variability" under Domestication.- Progression in Evolution.- The Evidence for the Occurence of Crosses between Individuals Belonging to Different Linneons in Nature.- The Effect of Crossing Linneons.- The Origin of the Great Classes.- The Question of Relationship.- The Question of Phylogeny.- Homologous Parts and Rudimentary Organs.- Migration.- Geology and the Constancy of Species.- Conclusions from the Behaviour of Diploid Organisms.- Haploid Organisms and Mutation.- Diploid Organisms and Mutation.