100 GENETIC STOCKS AND BREEDING METHODS 



Table 27— Continued 



Name or 

 Symbol 



Synonym(s) 



Remarks 



STR/1 

 SWR 



Swiss, 



Swiss-R, 



Swiss-8 



VVB 



WC 

 WH 

 WK 

 WLL 



White Label, 

 Kreyberg, 

 White Label 

 Leeds 



YBR 



YS 



ZBR 



IV/B 



XVII 



Zavadskaia 

 Brachy 



17 



inbr (N): 50. genet: aabbss. origin: piebald branch of STR 

 originating at NIH in 1951 at F 29 . maintained by: N. 



inbr (Jax) : 62. genet: cc. origin: a strain of Swiss mice from A. de 

 Coulon of Lausanne, Switzerland, inbred by Lynch, charac: 44% 

 pulmonary tumors, 19% mammary tumors in breeding $$. main- 

 tained. by: De, G if, Jax, J b, Ly, Ms. 



inbr (Sp) : 20. genet: cc. origin: noninbred Tumblebrook stock in 

 1948, inbred thereafter. Mice were submitted to a single cutaneous 

 application of methylcholanthrene in benzene for seven consecutive 

 generations, F 6 through F 12 . charac: high incidence of mammary 

 tumors, maintained by: Sp. 



inbr (Re): genet: aaWw. origin: heterozygous mice carrying Ww 

 were sent by S. Waelsch and S.J. Holman to Russell in 1948. Following 

 several intercrosses and outcrosses to C57BL/6, b x s inbreeding with 

 forced heterozygosis of Ww began in 1949. Separate lines were main- 

 tained which gave rise to four distinct strains, WB, WC, WH, and WK. 

 charac: homozygotes (WW) are anemic, die at approx. 11 days. 

 maintained by: Re. 



inbr (Re): 29. genet: aaWw. origin: same as WB. charac: 

 anemics die at approx. 14 days, maintained by: Re. 



inbr (Re): 29. genet: aaWw. H-2 d . origin: same as WB. 

 charac: anemics die at approx. 5 days, maintained by: Re. 



inbr (Re): 27. genet: aaWw. origin: same as WB. charac: 

 anemics die at approx. 10 days, maintained by: Re. 



inbr (Ge) : 53. genet: cc. origin: Kreyberg, to Bonser at Leeds in 

 1934. charac: 20-33% mammary tumors in breeders, main- 

 tained by: Br, Ge. 



inbr (Wi): 27. genet: A", origin: Wilson, from noninbred stock 

 called "a group of mixed ancestry carrying the yellow gene" received 

 from Danforth, Stanford, in 1948. maintained by: Wi. 



inbr (He): 70. genet: A y abb. H-2 d '. origin: Little, to Andervont, 

 1936; to Heston, 1946; to Wilson, 1948; to Hauschka, 1951. main- 

 tained by: Ha, He, Ly, Wi. 



inbr (Ch): 40. genet: A y ass. origin: original Y from Jax. Spot- 

 ting introduced, then crossed with C57BL in 1948, then inbred. 

 maintained by: Ch. 



inbr (Gw) : 56. genet: cc. origin: Gowen, from Swiss mice of the 

 Yellow Fever Lab. of the Rockefeller Inst, charac: medium sus- 

 ceptibility to typhoid. Medium susceptibility to radiation. Capable 

 of having many litters, but raises few. maintained by: Gw. 

 inbr (Co): 21. genet: ssT+. origin: from Dobrovolskaia- 

 Zavadskaia in 1930; outcrossed in succession to several Columbia 

 stocks, maintained by: Co. 



genet: albino, origin: from N. Dobrovolskaia-Zavadskaia to 

 Centro per lo studio e la cura dei tumori, Busto Arsizio, in April, 

 1948. charac: mammary tumor incidence 28%, early breeding and 

 pregnancy increase incidence. Susceptible to multiple tumors. 



MAINTAINED BY: Baz. 



inbr (Rd): 28. genet: cc. origin: Institut du Radium, 1930. 

 Rigorous inbreeding since 1951. charac: mammary tumors 1-5%. 



