300 biiu;er kajanus 



turyidum and durum, especially small in some tiirgidum types {con- 

 tnictiim): it was greater in vulgare and still greater in speltoides. On 

 the contrary, the numher of spikelets was, in general, large in turgi- 

 dum and durum, smaller in vulgare and particularly small in speltoides. 

 Concerning the cross of vulgare X dicoccum (tables 23 — 26) the 

 occurrence of Spelta types besides the types of dicoccum and vulgare 

 is notised. The Spelta types were probably formed through the com- 

 bination of a Spelta gene coming from the dicoccum parent and the 

 vulgare gene belonging to the other parent. Some forms resembling 

 vulgare had very flat and dense spikes: they are called compressum. 

 The internode-length of dicoccum was in general small, sometimes 

 however greater — suhdicoccum (in these plants the outer glumes w-ere 

 also larger). In Spelta the internode-length was mostly great, whereas 

 the vulgare progenies formed a series connecting the other groups. 

 The number of spikelets was rather large in dicoccum, yet reduced 

 in laxer forms, smaller in vulgare and still smaller in Spelta. 



ZITIERTE LITERATUR. 



1. Kajanus, B. 1923. Genelische Untersuchungen an Weizen. Bibl. Gen. Bd. V. 



Leipzig. 



2. Malinowski, E. 1914. Les hybrides du Froment. Bull, de l'Acad. des Sei. de 



Cracovie. Krakow. 



3. — 1916. Über die durch Kreuzung hervorgerufene Vielförmigkeit beim Wei- 



zen. Comptes Rendus de la Soc. des Sei. de Varsovie. IX Année. 

 Warszawa. 



4. — 1918. Études sur les hybrides du Froment. Trav. de la Soc. des Sei. de 



Varsovie. No. 30. Warszawa. 

 ô. Nilsson-Ehle, h. 1911. Kreuzungsunlersuehungen an Hafer und Weizen. IL 



Lunds Univ. Ârsskr. N. F. Afd. 2. Bd. 7. Nr. 6. Lund. 

 0. Parker, W. H. 1914. Lax and dense-eared wheats. .Journ. of Agric. Sei. 



Vol. VI. Cambridge. 



