Vererbung, Variation, Mutation. 441 



1231) Davis, B. M., Further liybrids of Oenotho n bicnnis and O. graudi- 

 flora that resemble O.lamarrkiana. In: Amer. Natural. 46, S. 377 — 427, 

 figs. 15, 1912. 



A further description of liybrids from the above cross which resemble the 

 Oenotliem JamarcMana of De Vries experiments in various respects. [In bis dis- 

 (ussion of the origin of 0. lamarc/ciana, the writer carefully ignores the fact 

 that large-flowered Oenotheras were known in Europe a Century before the time 

 of which he writes.] Gates (London), 



1232) East, E. M., Inheritance of color in the aleurone cells of Maize. In: 

 Amer. Natural. 46, S. 363—366, 1912. 



Au interpretatiou which is in accord with the results of breediug experiments, and 

 which also briugs the explauation of inheritance of the aleurone colours in maize into 

 harmony with that for sap colours in various flowers. Gates (London). 



1233) Grotll, ß. H. A. (New Brunswick, N. J.), The F^ Heredity of Size, 

 Shape and Number in Tomato Fruits. New Jersey Agr. Expt. Stat. Bul- 

 letin 242, S. 1 — 39, 1912. 



Tlie paper describes the results in the Fj generation of certain tomato 

 Grosses, involving nine different types of this plant. The following characters 

 were particularly studied: absolute polar diameter of fruit, shape of fruit, number 

 of seed cavities (locules or cells), number of hairs on epidermis. The following 

 were the chief results: Fruits of tomato type may possess latent factors for size 

 and shape different from tliose they exhibit, Either the factors for the actual 

 size and shape or the latent factors may be active in a cross to determine the 

 size and shape of the F^ fruits. The size and shape of the Fj fruits are geo- 

 metric means between the size and shape corresponding to those factors of the 

 parents, which were active in crossing. Tomato fruits may carry a factor for 

 two locules; or a factor for two locules and another for addition cells; or a 

 factor for two locules, another for addition cells, and a third for a broken center. 

 When types possessing a factor for addition cells are crossed with two-celled 

 types or with each other, the differences between the number of locules of the 

 cross and those of the two parents separately, bear to each other the same ratio 

 as the differences between the surface area of the equatorial section of the F^ 

 fruit and the respective areas of the two parents separately bear to each other. 

 In crosses of types possessing factors for a broken center with other types, the 

 inheritance of cell number in the F^ fruits is similar, except that another factor 

 for cell number, a function of the respective factor for broken center, becomes 

 active in determining the cell number of the cross. In the F^ fruits of types 

 possessing factors for broken centers with each other, the factor for the lower 

 cell number seems to be dominant. (Five instances only). 



The Fj heredity of size, shape, and number in cell structures of the fruit 

 skin is influenced by other unknown factors besides the factors for size, shape, 

 and number apparent in the parents. Eeciprocal and duplicate crosses usually 

 agree in the inheritance of all characters studied; but they may differ greatly. 

 Even fruits borne by plants raised from the seed of one fruit pollinated by pollen 

 from a Single flower may differ radically in characters of size, shape, and number, 

 When crossing the rougli "Peaches" with the smoot types, partial Xenia may 

 occur. Pearl (Orono). 



1 234) McClendou, CA. (Experiment, Ga.),Men de li an Inheritance inCotton 

 Hybrids. In: Georgia Expt. Stat. Bulletin 98, S. 141—228, 1912. 



