GENETIC STRAINS AND STOCKS 97 



Table 27 — Continued 



Name or 

 Symbol 



Synonym(s) 



Remarks 



MAf 



MABA 



N 



NB 

 NH 



NLC 



NS 



NZB 

 NZC 

 NZO 



NZY 



NZYf 



02 O 

 P 



inbr (Sp) : ? + 21. genet: cc. origin: Murray, from MA born by 

 cesarean section and fostered on BD. To Simpson in 1948. charac: 

 high incidence of reticular tissue neoplasm in old age; high pulmonary 

 tumor, maintained by: Sp. 



inbr (Sp) : ? + 16. genet: cc. origin: MA $ x A <$ (Murray). 

 To Simpson in 1948. charac: low mammary tumor, maintained 

 by: Sp. 



inbr (St): 67. genet: aabbddss. origin: Strong, about 1926, from a 

 group of unpedigreed mice. Ancestral to PBR strain, charac: low 

 tumor incidence, resistant to chemical induction of tumors, main- 

 tained by: Ao, St. 



inbr (Mc): 64. genet: aabbc ch p\c oh pdse\dse. origin: E. L. Green. 



MAINTAINED BY: Mc, Rl. 



inbr (Di) : ? 10. genet: ddppss. origin: Strong, from cross involving 

 strains CBA, N, and JK; to Kirschbaum; to Dickie in 1956. charac: 

 low incidence of tumors, but 30-42% pulmonary tumors in very old 

 mice. Reproductive senility about 8-9 months of age followed by 

 appearance of nodular hyperplasia of adrenals. Animals very 

 sensitive to light, high incidence of blindness. Poor breeders and 

 small litters, maintained by: Di, Ms. 



inbr (Rd) : 26. genet: albino, origin: a pair of mice of uncertain 

 origin in 1949 at Foundation Curie, b x s since then, charac: 

 mammary tumors in 50% of force-bred $$, 18% of virgins; have MTI. 

 Females transmit a nonchromosomal resistance factor against leukemia 

 in NLC x AKR hybrids. Sensitive to leukemogenic action of 

 methylcholanthrene. Vigorous, good breeders, and good mothers. 

 maintained by: Rd. 



inbr (Fr) : 27. genet: a'a 1 + cN + . origin: from heterogeneous 

 Nn stock crossed to A from Jax (March, 1945), and inbred with forced 

 heterozygosis for Nn and Cc. charac: tendency to prolapsus uteri in 

 later life, maintained by: Fr. 



inbr (Bl) : 42. origin : from NZO at F 3 



MAINTAINED BY: Bl. 



charac: hemolytic anemia. 



inbr (Bl) : 45. charac: about 1% mammary tumors; occasionally 

 cystic kidney; short tail, maintained by: Bl. 



inbr (Bl) : 43. charac: obese. Mammary tumor less than 1%; high 

 incidence of pulmonary adenoma and of benign tumors of the small 

 intestine, maintained by: Bl. 



inbr (Bl) : 37. charac: mammary tumors, 60% in breeders, 28% in 

 virgins. Pituitary enlargement in over 90% ?? 12 mo. and older. 

 Since F 17 about 10% megacolon, maintained by: Bl. 



inbr (Bl) : 11 since fostering, origin: fostered on NZC at F 26 . 

 charac: marked reduction in mammary tumors. Pituitary tumor 

 incidence not altered, maintained by: Bl. 



inbr: 86 + . origin: Korteweg. maintained by: not reported. 



inbr (Jax): 69. genet: aabbdsejdsepprdrd. H-2 P . origin: Snell, 

 extracted following outcross of similar stock developed by Gates. 

 Snell to McNutt at F 35 , back to Jax in 1948 at F 39 . maintained by: 

 Jax,Jb. 



