Band 140. Nr. 3. XL. Jahrgang. I. Bd. Nr. 3 



Botanisches Centralblatt 



Referierendes Organ 



der 



Association Internationale des Botanlstcs 

 für das Gesamtgebiet der Botanik. 



Herausgegeben unter der Leitung 

 {i£S 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. G. Bonaventura, A. D. Cotton, 



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



von zahlreichen Specialredacteuren in den verschiedenen Ländern. 



Dr. J. P. Lotsy, Chefredacteur. 



No.3. 



Abonnement für das halbe Jahr j^ Mark 



durch alle Buchhandlunjjen und Postanstalten. 



1919. 



Alle für die Redaction bestimmten Sendungen sind zu richten an: 

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



Surfaee, F. M., Studies on oat breeding. III. On the inhe- 



ritance of certain glume characters in the cross Avena 



fatua X A. sativa var. Kherson. (Genetics. I. p. 252—286. 1916.) 



The Contents of this paper may be summarized best by the 

 writers words: 



The wild parent {Avena fatiia) used in this cross possesses the 

 following glume characters which are considered in this paper. 

 The flowering glumes are black or dark brown in color. Both the 

 lower and Upper grains of each spikelet bear heavy geniculate 

 and twisted awns. The back of each grain is covered with a thick 

 pubescence. Likewise there is a thick ring of short hair about the 

 base of each grain. The pedicel on each grain is heavily pubescent. 

 The base of each grain is expanded into a broad sucker-like ring 

 which permits the grain to shatter very easily. 



The grain of the cultivated parent {Avena sativa var. Kherson) 

 is yellow in color. It possesses no awns except that occasionally 

 a Single spikelet may be found with a very weak awn on the lower 

 grain only. The cultivated parent entirely lacks pubescence on all 

 of the regions noted above. The base of the grain is narrow and 

 contracted and the grain does not shatter. 



The Fiplants are generally intermediate between the two 

 parents. The grain ist brown in color but distinctly lighter than 

 the wild parent. Medium heavy awns are present on the lower 

 grains of some spikelets. No awns are ever found on the upper 

 grains. The lower grain is pubescent on the back but the Upper 

 grain is entirely smooth. There is a fairly heavy tuft of hair at 

 the sides of the base of the lower grain, but none on the upper 

 grain. The base of the lower grain is intermediate in character 



Hotan. Centralblatt. Band 140. 1919. 3 



