Trinket cattle are the inhabitant of a small island called Trinket, which is one of the picturesque islands of Andaman. This herd is thought to be of Danish leftover during their dynasty in Nicobar archipelago. When the island was abandoned by foreign invaders, indigenes utilized the animals for the purpose of meat. As a result, the cattle became semi-feral in nature. After the Great Sumatra earthquake and tsunami of Indian Ocean in 2004, Trinket island was left abandoned by indigenes and the cattle became totally feral in nature. To trace the genetic root of the cattle, this study has been undertaken based on the sequence information of the mitochondrial D-loop and cytochrome b gene. The genomic DNA was extracted from the blood samples of the Trinket cattle and was used for amplification of mitochondrial markers, and the sequence information was generated by Sanger sequencing. The analysis of sequence information revealed that the Trinket cattle belongs to Bos indicus (I) haplotype, sub-haplotype I2. The presence of I2 sub-haplotype in Trinket cattle may be due to the expansion of this I2 haplotype towards Southeast Asian countries. This is a novel input for the formulation of breeding strategy towards conservation of eco-friendly sustainable livestock in the isolated island ecosystem.

中文翻译：

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追踪 Trinket 牛的遗传根源：尼科巴群岛一个小孤岛的濒危牛群

Trinket 牛是一个名为 Trinket 的小岛的居民，该岛是安达曼风景如画的岛屿之一。这群牛群被认为是丹麦人在尼科巴群岛的王朝时期遗留下来的。当该岛被外来入侵者遗弃时，土著人利用这些动物来获取肉食。结果，牛变成了半野性的。2004年苏门答腊大地震和印度洋海啸后，Trinket岛被土著人遗弃，牛群变得完全野性。为了追踪牛的遗传根源，这项研究是基于线粒体 D-loop 和细胞色素 b 基因的序列信息进行的。从 Trinket 牛的血液样本中提取基因组 DNA 并用于线粒体标记的扩增，序列信息由Sanger测序生成。序列信息分析表明，Trinket 牛属于 Bos indicus (I) 单倍型、亚单倍型 I2。Trinket 牛中 I2 亚单倍型的存在可能是由于该 I2 单倍型向东南亚国家扩展。这是制定育种策略以保护孤岛生态系统中生态友好型可持续牲畜的新输入。