MENDEL'S PKINCIPLES APPLIED TO WHEAT HYBRIDS. 



879 



to be intermediate between the parent forms, and that rarely an individual 

 resembles one parent more or less closely, has been stated by others. We 

 may add to this, provisionally at least, the following : 



" (1) In the second generation of hybrids of similar breeding (with close 

 fertilisation) the same types tend to occur, and in definite proportions ; two 

 of these types are like the parents, the others include all possible inter- 

 mediate forms. 



" (2) With few exceptions the most abundant type in the second genera- 

 tion is the same as the type found in the first generation, whether the first 

 generation was strictly intermediate between the parents or not. 



" The seed has already been sown that these studies may be continued in 

 the third and later generations. It is hoped by continuing them to later 

 generations to learn a good deal of a quantitative character regarding the 

 transmission of parent characters to hybrid offspring in Wheats. 



" Explanation of Tables. 



" The tables give the percentage of each type found in all plats in 

 which this was determined. The first column gives the series and number 

 of the plats. Type I., in each case (except Table XII.) is that of the parent 

 belonging to T. vulgare. The last type is that of the club parent. The 

 types are all based on certain obvious characters of the parents. In Table 

 XII., Type IV. is that of the T. vulgare parent, the first four types in this 

 cross being bearded and, in this respect, unlike either parent. The figures 

 in heavy type represent the proportion of that type most closely resembling 

 the first generation. 



" Abbreviations. 



" In describing the types, the following abbreviations are used : l=heads 

 long (T. vulgare type) ; s=heads short (T. compactum type) ; sl=semi- 

 long=intermediate between T. vulgare and T. compactum ; be— bearded ; 

 ba=bald (not bearded); br=brown chaff; li= light -coloured chaff; v= 

 velvet chaff ; g= glabrous chaff ; m=male parent ; f = female parent. 



Table I. 



M. — Emporium ; 1, br. 

 F.— Little Club ; s, li. 



Types 



I 



II 



III 



IV 



V 



VI 



VII 



VIII 



IX 



X 



XI 



XII 





l 



l 



1 



l 



si 



si 



si 



si 



s 



s 



s 



s 



Plat No. 



be 



be 



ba 



ba 



be 



be 



ba 



ba 



be 



be 



ba 



ba 





br 



li 



br 



li 



br 



li 



br 



li 



br 



li 



br 



li 



A3 . . 



11-3 



0-9 



13-3 



6-8 



4-3 



21 



5-1 



1-5 



17-4 



7-7 



20-9 



8-9 



A4 . . 



40 



1-0 



16-2 



5-8 



3-3 



4-3 



152 



30 



9-9 



3-7 



32-8 



8-0 



