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Inheritance of litter size at birth in the Brazilian grass mouse (Akodon cursor, Sigmodontinae, Rodentia)

Published online by Cambridge University Press:  16 September 2002

YU. S. AULCHENKO ,
L. O. ARARIPE ,
P. S. D'ANDREA ,
A. A. SHISHKIN ,
R. CERQUEIRA ,
P. M. BORODIN  and
T. I. AXENOVICH
YU. S. AULCHENKO
Affiliation:
Institute of Cytology and Genetics, Russian Academy of Science, 630090 Novosibirsk, Russia
L. O. ARARIPE
Affiliation:
Institute of Biology, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
P. S. D'ANDREA
Affiliation:
Institute of Tropical Medicine, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
A. A. SHISHKIN
Affiliation:
Institute of Cytology and Genetics, Russian Academy of Science, 630090 Novosibirsk, Russia Department of Cytology and Genetics, Novosibirsk State University, 630090 Novosibirsk, Russia
R. CERQUEIRA
Affiliation:
Institute of Biology, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
P. M. BORODIN
Affiliation:
Institute of Cytology and Genetics, Russian Academy of Science, 630090 Novosibirsk, Russia Institute of Biology, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil Department of Cytology and Genetics, Novosibirsk State University, 630090 Novosibirsk, Russia
T. I. AXENOVICH
Affiliation:
Institute of Cytology and Genetics, Russian Academy of Science, 630090 Novosibirsk, Russia Department of Cytology and Genetics, Novosibirsk State University, 630090 Novosibirsk, Russia
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Abstract

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By means of complex segregation analysis we studied the inheritance of litter size in two large pedigrees of captive-bred colonies of the Brazilian grass mouse Akodon cursor. Genetic analysis has revealed a highly significant influence of genetic factors on the variation of litter size (heritability, h2, was estimated as 0.44). The inheritance followed the classical polygene model: neither the major-gene model nor the polygene with unequal contribution model described the data significantly better.

Type
Research Article
Information
Genetics Research , Volume 80 , Issue 1 , August 2002 , pp. 55 - 62
Copyright
© 2002 Cambridge University Press