No recombination was detected between two X-linked loci, RNR (Xp) and GPD (Xq), among 69 backcross progeny of two distantly related tammar wallaby (Macropus eugenii) subspecies. RNR loci are not dosage compensated, whereas the GPD locus is subject to the paternal X chromosome inactivation system that characterises female marsupials. The border of the region controlled by the marsupial X chromosome inactivation system has therefore been shown to lie between RNR and GPD.
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机译：在两个远亲小袋鼠（Macropus eugenii）亚种的69个回交后代中，未检测到两个X连锁位点RNR（Xp）和GPD（Xq）之间的重组。RNR 位点没有剂量补偿，而 GPD 位点受制于父系 X 染色体失活系统，该系统是雌性有袋动物的特征。因此，由有袋动物 X 染色体失活系统控制的区域边界已被证明位于 RNR 和 GPD 之间。
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