Species and
章节目录
共 72 题- Produced by Dave Gowan
- Lectures delivered at the University of California
- THE ORIGIN OF SPECIES
- PREFACE BY THE AUTHOR
- PREFACE BY THE EDITOR
- PREFACE TO THE SECOND EDITION.
- CONTENTS
- A. INTRODUCTION.
- LECTURE PAGE
- B. ELEMENTARY SPECIES.
- C. RETROGRADE VARIETIES.
- D. EVERSPORTING VARIETIES.
- E. MUTATIONS.
- F. FLUCTUATIONS.
- Index 827
- LECTURE I
- LECTURE II
- ELEMENTARY SPECIES IN NATURE
- LECTURE III
- ELEMENTARY SPECIES OF CULTIVATED PLANTS
- LECTURE IV
- SELECTION OF ELEMENTARY SPECIES
- LECTURE V
- CHARACTERS OF RETROGRADE VARIETIES
- LECTURE VI
- STABILITY AND REAL ATAVISM
- LECTURE VII
- FALSE ATAVISM OR VICINISM
- LECTURE VIII
- LATENT CHARACTERS
- LECTURE IX
- CROSSES OF SPECIES AND VARIETIES
- LECTURE X
- MENDEL'S LAW OF BALANCED CROSSES
- Cross 1. Generation 2. Generation 3. Generation
- 1A+2H+1L.
- LECTURE XI
- STRIPED FLOWERS
- LECTURE XII
- FIVE-LEAVED CLOVER
- LECTURE XIII
- PISTILLODY IN POPPIES
- LECTURE XIV
- MONSTROSITIES
- LECTURE XV
- DOUBLE ADAPTATIONS
- E. MUTATIONS
- LECTURE XVI
- THE ORIGIN OF THE PELORIC TOAD-FLAX
- LECTURE XVII
- THE PRODUCTION OF DOUBLE FLOWERS
- LECTURE XVIII
- NEW SPECIES OF _OENOTHERA_
- LECTURE XIX
- EXPERIMENTAL PEDIGREE-CULTURES
- II. New forms spring laterally from the main stem.
- III. New elementary species attain their full constancy at once.
- V. The same new species are produced in a large number of individuals.
- VII. The mutations take place in nearly all directions.
- THE ORIGIN OF WILD SPECIES AND VARIETIES
- MUTATIONS IN HORTICULTURE
- SYSTEMATIC ATAVISM
- TAXONOMIC ANOMALIES
- THE HYPOTHESIS OF PERIODIC MUTATIONS
- LECTURE XXV
- GENERAL LAWS OF FLUCTUATION
- LECTURE XXVI
- ASEXUAL MULTIPLICATION OF EXTREMES
- LECTURE XXVII
- INCONSTANCY OF IMPROVED RACES
- LECTURE XXVIII
- ARTIFICIAL AND NATURAL SELECTION