The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . ual components of this diverseassemblage. I have confined the solution of this problemto the three chief types: finely striped, coarsely striped,and uniformly red. Let us begin with the two formergroups. The ofTspring of the parent plant A (Fig. 22 and tableon page 125) contained many coarsely striped individ-uals (Fig. 22^) ; when they were in flower I transplantedsome very coarsely striped ones to a special bed, pickedofiF all their flowers and young fruits and enclosed allthe buds which sub
The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . ual components of this diverseassemblage. I have confined the solution of this problemto the three chief types: finely striped, coarsely striped,and uniformly red. Let us begin with the two formergroups. The ofTspring of the parent plant A (Fig. 22 and tableon page 125) contained many coarsely striped individ-uals (Fig. 22^) ; when they were in flower I transplantedsome very coarsely striped ones to a special bed, pickedofiF all their flowers and young fruits and enclosed allthe buds which subsequently opened to insure self-fertili-zation. Tn the same way I treated some plants from thebed B (Fig. 22B) with almost yellow flowers. I har-vested and sowed the seeds of each plant separately. In August, 1898, when the beds were in full flower,T determined the amount of striping by the method al- Antirrhijiuiu Ma jus Striatum. 127 ready employed, taking care that the boundaries betweenthe inchvi(hial grou])s corresponded as closely as pos-sible with those of the previous year. I succeeded in. g. a. b. Fig. 22. Antirrlumiui majus hifeum rubro-stnaftiin. A, B,C, curves showing the degree of striping amongst theoffspring of three insect-fertihzed plants, 1897. g, lemonyellow, almost without red stripes; s, narrowly striped;b, broadly striped; R, uniform red. See table, page 125, recording the rather scanty offspring of four coarselystriped parents. The result is given below. (The indi-vidual seed-parents of 1897 are denoted as Ai—A4.) OFFSPRING OF THE COARSELY STRIPED SEED-PARENTS. StripesLess than 4 mm broad ^10 A,0 ^30 ^40 Totals0 1-5 mm broad 3 2 6 8 19 1-6 mm broad 5 4 6 9 24 Broad fields 7 8 5 6 26 Uniform red 2 0 2 5 9 Totals 17 14 19 28 78 These figures are exhibited graphically in Fig. 23B. As the extent of this experiment was relatively smalland especially as the proportion of self-colored plantsappeared to me very small, I repeated it in the following-year. T chos
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