108 Inheritance in Barley 



(5) Variation in the form of the mosaic is yet another indication of 

 ordinary lateral-floret " sterility " (better, " non-fertility "). Whereas, 

 in general, the mosaic was of the type "6-row base and 2-row tip" there 

 were found some ears 6-row all down one side and 2-row all down the 

 other. It is not stated whether or not each kind of " mosaic " bred true 

 and whether or not both types could occur upon a single plant. These 

 questions of circumstantial fact are very important. 



On p. 246 (10) a somewhat revolutionary conclusion is recorded. 

 Crosses between closely allied lines exhibit Mendelian inheritance : 

 those between distant lines ("du melange d'especes linneennes dis- 

 tinctes — nutans, erectum, nudum ") are characterised by ratios differing 

 from those required by Mendel's Laws. These deductions were made 

 with reference to crosses in which the experimental character was 

 " projections on the nerves of the palea." It is to be observed that many 

 barley crosses have been made and " Mendelian " results recorded, 

 despite the fact that the parents were more distantly related than those 

 which Blaringhem cited. However, the results recorded in connection 

 with Blaringhem's particular character are not such as to afford, of 

 themselves, a refutation of the above conclusions. [The inter-specific 

 crosses among the wheats furnish perhaps the best collection of evidence 

 in refutation of the conclusions.] 



BIBLIOGKAPHY. 



1. Atterberg. Transactions of Swedish Horticultural Socisty, 1905. 



2. KoRNlCKE. Arten u. Varietaten des Getreides. Berlin, 1885. 



3. Beaven. " Varieties of Barley." J. Fed. Inst. Brewing., Vol. viii. No. 5. 



1902. 



4. BiFFEN. " The Hybridisation of Barleys." J. Ag. Sci. Vol. ll. 1907 — 8. 



5. . " The Inheritance of Sterility in Barleys." J. Ag. Sci. Vol. I. 1905—6. 



6. V. Ubisch. " Beitrag zu einer Faktorenanalyse von Gerste." Zeit.f. Ind. Ab. 



It. Vererb. B. xvii. H. 1/2. Nov. 1916. 



7. Morgan. " Dilution Eftects and Bicolorism in Certain Eye Colours of Dro- 



sophila." J. Exp. Zoo. xv. 



8. Nabours. "Studies of Inheritance and Evolution in Orthoptera." J. Gen. 



III. 



9. Ikeno. " Etude genetique sur les aretes d'une race de I'Orge a six rangs." 



Bot. Mag. Tokyo, xxxi. No. 370, 1919. 

 10. Blaringhem. Les Problemes de VEeredite experimentale. Paris, Ernest 

 Flammarion, 1919. 



