June, 1922 



SCIENTIFIC AGRICULTURE 



319 



The Mode of Inheritance of Certain Characters 



in Wheat 



• J. B. Harrington * 

 Gradute Student, University of Minnesota ** 



The results described in this paper were 

 obtained from a small portion of the cereal 

 breeding nursery material grown in 1921 

 on the University of Saskatchewan Experi- 



mental Farm at Saskatoon. The general 

 mode of inheritance of the wheat characters 

 here discussed has been made known through 

 previously published studies. The results 



Table I. — Description of Parent Varieties 



Taylor's Wonder . 

 Commonwealth . . 



Marquis 



White Bobs ... 



Kitchener 



Red Bobs 



Hard Red Calcutta 



+3 V 



< 



T. W\ 

 . Com. 



Mar. 



W. B. 



Kit. 



R. B. 

 . H. R. C. 



>>c 



Canada 

 Australia 

 Canada 

 Australia 

 Canada 

 Canada 

 "ndia 



4, O 



ic 



Tip-awned 

 Tip-awned 

 Tip-awned 



Bald 

 Tip-awned 



Bald 

 Bearded 



Seed texture 



CJ 

 White 



Red 

 White 

 White 

 White 

 White 

 White 



White 

 Red 

 White 

 Whi<e 

 Red 

 Red 

 Red 



49 

 33 



88 

 i'O 

 87 

 75 

 82 



CO 

 U3 



n 

 Semi-hard 

 Soft 

 H 1 

 H \ 

 Haul 

 Hard 

 Hard 



Table II.— The Inheritance of Seed Colour 



±•'2 plants seed 

 colour 



R. B. 



Nos 

 H. R. 



Nos 

 Kit. X 



No. 

 R. B. 



Nos 

 H. R. 



No. 



H. R. 



Nos. 109 



u2 

 X T. W. . . 

 . 71, 77, 78 

 C. X W. B. . 

 113, 114 



Com 



90 



X T. W. . . 

 . 72-76 

 C. X T. W. . 

 80 



C. X W. B. 

 , 110, 112, 115 



-a 

 u 



71 



72 

 36 



181 

 47 



111 



33 



29 

 4 



14 

 2 



2 ■* 



tj ^ 



< &, 



2.73:1.27 



2.68:1.32 



S45 

 o ~ 



.5 o 

 > ^ 



0.27 



0.32 



±0.11 



:0.12 



2.45 

 2.67 



14.40:1.60 0.60 ±0.41 1.49 



14.85:1.15 0.15 ±0.19 0.74 



15.35:0.65 



8 14.92:1.08 



0.35 



0.08 



:0.37 



:0.24 



0.94 



0.33 



* Formerly lecturer in field husbandry at 

 the University of Saskatchewan. 



**The writer wishes to thank the Field 

 Husbandry Department of the University of 

 Saskatchewan for the wheat material "fur- 

 nished and Dr. H. K. Hayes for helpful crit- 

 icisms made during the preparation of the 

 manuscript. 



Note 1. The material which furnished the 

 data given in Table II resulted from cross- 

 pollinations made on six spikes of wheat in 



1919. Each hybrid seed produced an F^ 

 plant in 1920 and this, in 1921, gave an Fj 

 family. The F, families arising from the 

 same cross-pollinated spike are grouped to- 

 gether. 



Note 2. The formula used for the deter- 

 mination of probable error is 

 P. E. = ± 0.6746 



V^ 



(K-N) 

 n 



where N = a particular term of a 

 Mendelian ratio, K = the sum of all the 

 terms of such ratio, and n= the total number 

 of individuals classified. 



