) has a 2n = 16 karyotype with an XX/XY female/male sex dimorphism. Female reproduction can be manipulated to produce up to five offspring per year. We have crossed two genetically distant subspecies of tammars, one from Kangaroo Island in South Australia, the other from Garden Island in Western Australia, to produce fertile F
offspring of both sexes. Male F
hybrids were crossed with female Kangaroo Island tammars to produce over 80 phase-known backcross progeny for linkage studies. Here we report detection of two linkage groups derived from these male recombination values. The first consists of α-lactalbumin and an anonymous tammar cDNA clone, pB72; the second contains the gene for a marsupial-specific milk protein (late lactation protein), the gene for lipoprotein lipase, and an anonymous cDNA clone, pB65. The gene for late lactation protein has previously been assigned to tammar chromosome 3.
Request reprints from Dr. D.W. Cooper, School of Biological Sciences, Macquarie University, New South Wales, 2109 (Australia); telephone: 61-2-805-8214; fax: 61-2-805-8245.
Received: 6 August 1992
Published online: May 14, 2008
Number of Print Pages : 4
Cytogenetic and Genome Research
Vol. 64, No. 3-4, Year 1993 (Cover Date: 1993)
Journal Editor: Schmid M. (Würzburg)
ISSN: 1424–8581 (Print), eISSN: 1424–859X (Online)
For additional information: http://www.karger.com/CGR
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