Bandicoot rats (genus Bandicota ) are distributed widely across the Indomalay biogeographic realm of tropical East Asia. One widely distributed species, the greater bandicoot rat ( Bandicota indica ), has a disjunct distribution including both north and south of the biogeographic break at the Isthmus of Kra. We compared genetic variation of greater bandicoot rats from north and south of the Isthmus of Kra using mitochondrial cytochrome b (cyt b , 1140 bp) and nuclear interphotoreceptor retinoid binding protein (IRBP, 801 bp) sequences. We found that the greater bandicoot rat ( B. indica ) is not native to Sundaland, the region south of the Isthmus of Kra. The species was introduced to the region recently as the genetic divergence with other regions is very low and phylogenies of both genes showed Malaysian greater bandicoot rat very closely related to conspecifics from Lao PDR. Haplotype data revealed all individuals from Malaysia are homogenous, which implied that the species was introduced recently. The greater bandicoot rats in Malaysia are so far only reported in the rice producing regions of Kedah and Perlis, but they may be increasing in number and distribution. A more detailed survey on the distribution and population demographics of Malaysian greater bandicoot rats are needed to support a management plan for this invasive species.

中文翻译：

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根据脱氧核糖核酸 (DNA) 分析，大袋狸鼠 (Bandicota indica) 不是巽他兰的原生动物

Bandicoot 大鼠（Bandicota 属）广泛分布于热带东亚的印度马来生物地理领域。一种广泛分布的物种，即大袋狸鼠 (Bandicota indica)，在克拉地峡生物地理断裂带的北部和南部均分布不连续。我们使用线粒体细胞色素 b（细胞色素 b，1140 bp）和核间光感受器类视黄醇结合蛋白（IRBP，801 bp）序列比较了来自克拉地峡北部和南部的大袋狸鼠的遗传变异。我们发现大袋狸鼠 (B. indica) 不是巽他兰（克拉地峡以南地区）的原生物种。该物种最近被引入该地区，因为与其他地区的遗传差异非常低，两个基因的系统发育表明马来西亚大袋狸鼠与老挝人民民主共和国的同种动物非常密切相关。单倍型数据显示来自马来西亚的所有个体都是同质的，这意味着该物种是最近引入的。迄今为止，马来西亚的大袋鼠只在吉打和玻璃市的水稻产区有报道，但它们的数量和分布可能会增加。需要对马来西亚大袋狸鼠的分布和人口统计进行更详细的调查，以支持针对这种入侵物种的管理计划。迄今为止，马来西亚的大袋鼠只在吉打和玻璃市的水稻产区有报道，但它们的数量和分布可能会增加。需要对马来西亚大袋狸鼠的分布和人口统计进行更详细的调查，以支持针对这种入侵物种的管理计划。迄今为止，马来西亚的大袋鼠只在吉打和玻璃市的水稻产区有报道，但它们的数量和分布可能会增加。需要对马来西亚大袋狸鼠的分布和人口统计进行更详细的调查，以支持针对这种入侵物种的管理计划。