Band 137. Nr. 6. XXXIX. Jahrgang. I. Bd. Nr. 6. 



Botanisches Centralblatt 



Referierendes Organ 



der 



Association Internationale des Botanistes 

 für das Gesamtgebiet der Botanik. 



Herausgegeben unter der Leitung 

 des Präsidenten: des Vice -Präsidenten: des Secretärs: 



Dr. D. H. Scott. Prof. Dr. Wm. Trelease. Dr. J. P. Lotsy. 



und der Redactions-Commissions- Mitglieder : 



Prof. Dr. Wm. Trelease, Dr. C. Bonaventura, A. D. Cotton, 



Prof. Dr. G. Wehmer und Mag. C. Christensen. 



von zahlreichen Specialredacteuren in den verschiedenen Ländern. 



Dr. J. P. Lotsy, Chefredacteur. 



No. 6. 



Abonnement für das halbe Jahr 15 Mark 

 durch alle Buchhandlungen und Postanstalten. 



1918. 



Alle für die Redaction bestimmten Sendmigen sind zu richten an: 

 Redaction des Botanischen Centralblattes, Haarlem (Holland), Spaarne 17. 



Gregory, R. P., On variegation in Primula sinensis. {Journ. of 

 Genetics. IV. p. 305—321. 1915.) 



In this paper are described some observations upon a race of 

 P. sinensis in which the alternative characters of normal green, 

 variegated and pale yellowish-green colour of leaves (or other 

 containing chloroplasts) are transmitted through the egg cells only — 

 the male gamete pjaying no part in respect of these characters. 



The experimental results obtained are similar to those already 

 described by Correns in Mirabilis Jalapa albomaculata and by 

 Baur in Antirrhinum maj'us albomacidatuin, with the exception 

 that in these primula races it has been found possible to raise to 

 maturity a few examples of the pale green type and to use them as 

 both male and female parents in crosses. 



The original variegated plant appeared among the progeny of 

 a cross between two normal green races. Variegated plants, with 

 this exception, have invariably been the offspring of a variegated 

 mother. 



The variegated character of leaves is quite independant of the 

 anthocyanic pigment such as occurs in striped flowers etc. 



The yellow-green plants differ from the normal in possessing 

 both smaller and less pigmented chloroplasts. In fuUy grown 

 Organs, the plastids contained in any individual cell are, in gene- 

 ral, of one kind only, even in the case of variegated plants. But in 

 young leaves of variegated plants, cells have been observed con- 

 taining the two kinds of plastid side by side in the same cell. 



In discussing his results the author accepts the general hypo- 

 thesis put forward by Correns and Baur for the similar pheno- 

 mena in Mirabilis and Antirrhinum but regards the evidence he 



Botan. Centralblatt. Band 137. 1918. 6 



