Summary
Polymorphism in chromosome pair no. 3 of Rattus norvegicus was found in laboratory strains and wild rats. Some of the animals had a subtelocentric pair no. 3, while others had a telocentric pair no. 3. 14 inbred strains were classified into two types concerning the pair no. 3.
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1.
YOS-type (characterized by a subtelocentric pair no. 3): ACI-, Albany-, Buffalo-, CW-, Fisher-, Long-Evans-, NIG-IV-, Wayne pink-eyed hooded-, WKA- and YOS-strains belong to this type.
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2.
WIS-type (characterized by a telocentric pair no. 3): Donryu-, NIG-III-, W/T- and WIS-strains are included in this type.
F1 hybrids between YOS- and WIS-strain rats had a heteromorphic pair no. 3 consisting of a telocentric and a subtelocentric chromosomes.
Polymorphism in pair no. 3 was also found in 43 wild rats collected in Misima. They were classified into three types concerning pair no. 3. Among 43 rats, 17 were WIS-type, 3 were YOS-type and the remaining 23 were of hybrid-type.
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This paper is dedicated to Professor Sajiro Makino, Zoological Institute, Hokkaido University, Sapporo, in honor of his sixtieth birthday, June, 1966.
Contributions from the National Institute of Genetics, Misima, Japan, No.557.
Supported by a Grant in Aid for Fundamental Scientific Research from the Ministry of Education.
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Yosida, T.H., Amano, K. Autosomal polymorphism in laboratory bred and wild Norway rats, Rattus norvegicus, found in Misima. Chromosoma 16, 658–667 (1965). https://doi.org/10.1007/BF00285115
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DOI: https://doi.org/10.1007/BF00285115