92 Vererbung, Variation, Mutation. 



The seifing of garden varieties with the object of discovering the sources of the 

 doruestieated strawberry gave no plants resembling F. vesca, but distinct traces 

 of chiloensis, virginiana and chinensis. The "perpetual" habit probably depends 

 on more than one factor. Some preliminary data with regard to sex are given, 

 but as yet no definite conclusions can be drawn from them, except that crosses 

 between pui'e males and pure iemales give in addition to males and females, 

 some hermaphrodites. Doncaster. 



228) Blaringhem, L. ? Sur la transmission hereditaire de la rouille 

 chez la rose tremiere (AltJuea rosea). In: C. R. Acad. Sc. Paris, Bd. 157, 

 Heft 26, S. 1536— 1539, 1913. 



En operant en culture pedigree, l'auteur a pu constater la receptivite plus 

 ou moins grande de certaines lignees de cereales aux attaques des parasites. — 

 D*autre part, l'epoque d'infection apparente est liee, pour chaque lignee, ä une 

 phase definie de la croissance. L'auteur a pu egalement suivre Finfection de plan- 

 tules d'AWicea rosea par le Puccinea mälvacearum. Certaines pustules apparaissent 

 des Fepanouissenient des cotyledons, et que tout ce qui modifie la biologie de 

 la plante modifie egalement l'epoque de l'apparition des Finfection. II a pu 

 niettre ce dernier point en evidence, d*une maniere plus nette encore en cultivant 

 des graines sterilisees en culture pure. L'apparition de Finfection est conditionnee 

 dans ce cas par les milieux nutritifs que Fon fournit aux plantules. Gatin. 



229) Salmon, E. S., On the appearance of sterile "Dwarfs" in Humu- 

 lus lupulinus L. In: Journ. of Genetics, Bd. 3, Nr. 3, S. 195— 200, 2 PL. 1914. 



The author has made crosses between male Hops and females of several cul- 

 tivated varieties, and in some has obtained dwarfs, which produce a numbre of 

 short thin stems almost or quite incapable of climbing. These dwarfs are totally 

 sterile. In one case out of 87 seedlings 52 were normal and 35 dwarfs, in 

 another with the same female variety but a male of a different variety there 

 were 66 normal and one dwarf (possibly due to error); in a third in which both 

 parents were of different varieties from the former all the seedlings were normal, 

 and in a fault, again between different varieties, there were 79 normal and 

 30 dwarfs. Doncaster. 



230) Cole, L. J., Sex-Limited Inheritance. In: Amer. Breeder's Mag., 

 Vol. IV, Nr. 3, S. 154—161, 1913. 



The author discusses the relative influence of the two parents on the off- 

 spring, dealing particularly with inheritance of color in pigeons. The three 

 primary colors lipon which the coloration of pigeons is based, blue, black and 

 red, do not appear as such unless an intense factor is present. When this factor 

 is absent the color or colors appear as dilute. The intense factor behaves the 

 same way in inheritance with whatever color or colors it may be associated but 

 it is shown to be sex limited, the female being heterozygous with respect to it. 

 The numerous examples which are seen frequently in the animal kingdom of the 

 daughter resembling the male parent and the sons the female parent are inter- 

 preted by Cole as due to sex limited inheritance. Pearl. 



231) "Wentworth, E. N., Color im Shorthorn Cattle. In: Amer. Breeders 

 Mag., Vol. IV, Nr. 4, S. 202—208, 1913. 



Attention is called to the errors which are present in pedigree records of 

 Shorthorns particularly during the period when this breed was especially in 





