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  • Pages
  • Table of Contents
Scientific Names on this Page

Indexed by Global Names
Book Title
Die Bastardbefruchtung im Pflanzenreich
By
Publication Details
Breslau, E. Margenstern, 1865
Year
1865
DOI
Holding Institution
Cambridge University Library
Sponsor
JISC & NEH
Copyright & Usage
Rights:
Darwin Estate and Cambridge University Library

Copyright Status:
In copyright


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Contributed by Cambridge University Library
Annotation Not Available

top-margin annotation Charles Darwin Esqre. with kind regard from — the author.


annotation cancelled The most striking case given of constitutional weakness of Hybrids


annotation Full Abstract) (1t01t02
          Max Wichura
t01 - `(1' in pencil
t02 - `Full Abstract (1' in Darwin's hand
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annotation S. 24 Willows have great power of combining into complex hybrids; he has united 6 species into one hybrid.

annotation [alongside next annotation] in Darwin's hand, in pencil / see Back p 2 /
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annotation S. 28. Thinks Gärtner's reversions due to parent pollen: Naudin's results point to opposite extreme. Does not Gärtner say that cultivated vars. revert more than wild species? Does this not account for difference between Naudin & Wichura?

annotation S. 29. The 6 fold hybrids cd not live —

annotation p 31. Says generally that Hybrids are not so strong & healthy.—

annotation S. 30 Gradation in sterility of Hybrid willows which «in extreme point of scale» t01 ends in death of young plants.
t01 - `« in extreme ... scale» ' in Darwin's hand, in pencil
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annotation S. 35. Gradation in potency of pollen.

annotation 38 pollen gets worse & worse in offspring of Hybrids inter se & in (p. 39) the more complex hybrid.

annotation S 41. Luxuriance in hybrid willows is by no means the rule rather the reverse.
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annotation (3t01
t01 - `(3' in Darwin's hand, in pencil

annotation p. 83 Explains sterility of hybrids by combined organization being ill-fitted for conditions. I give this view p. 288 / 3rd ed. of Origin; but contradicted if offspring from homomorphic unions are sterile.

annotation p 85. Explains increasing sterility of successive generations of hybrids inter se by inter-breeding like I do.

annotation p 85 The crossed Triticum & Aegilops which increased in fertility had 3/4 of Triticum blood.
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annotation p 89 cultivated plants which vary most often have irregular pollen and seems to think there is some analogy between variability & hybridism.
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annotation p. 92 Cultivated plants like hybrids, are in a state of dis-accommodation & he gives Kohlreuters view on this point


annotation S. 42. Cases of weakly hybrid willows
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annotation S 43. Believes in Kohlreuters view that luxuriance of hybrids results from sterility, ;false from mongrels —

annotation |t01 S. 43 & 44 Number of «individuals of either» t02 sexes modified in hybrid willow. there are more females & see p. 63.
t01 - `|' in Darwin's hand, in reddish-orange crayon
t02 - `« individuals of either» ' in Darwin's hand, in dark pencil
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annotation S. 50. Never saw a prepotent type & «therefore» doubts Gärtner.

annotation S 56 variabilityt01 in hybrid willows when hybrid pollen used;— uniformityt02 when pure pollen used.
t01 - underlined in Darwin's hand, in dark pencil
t02 - underlined in Darwin's hand, in dark pencil
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annotation S. 58 ; 66 difft kind of hybrid willow found wild
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annotation S. 64. Gives proportion of hybrids to pure species in different districts — in some places more hybrids than pure plants —

annotation p. 65 Ingeniously explains how they abound on certain spots from rapid Germination of seed . —t01
t01 - `of seed ... —' in Darwin's hand, in dark pencil
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annotation p. 80. gives case of species very like each other yet do not unite easily. —t01
t01 - `—' in Darwin's hand, in dark pencil


annotation Gärtner p. 474, & 582 on Revrsion occurrng chiefly in cultivated Plants —
     Naudin who «used» cultivated plants goes to one extreme & ‹M› Wichura who experimted on wild willows goes to other extreme


annotation p. 22
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annotation p 43 — Var. under Domstictn
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annotation 89.    do — Look over — allude to thery of non-accomodation — will not do if Primula & Linum are sterile. —
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