Abstract

A2 milk is an easily digestible product since it has only A2 beta-casein. In cattle, the A1 and A2 alleles are found in the population and the A2 milk is produced from A2A2 animals. Little is known about these alleles in other domestic dairy species. The present study aims to analyze sequence of genetic material available on public databases and quantify the animals genotyped. Eight domestic species were analyzed. There is strong evidence that domestic non-bovine species only carry A2 beta-casein. The data reported here for goats already confirm it due to the large number of animals genotyped as well as buffaloes. It means that they naturally produce A2 milk and no selection must be done. Thus, the fact that A2 milk is easier to digest can be used to add value to dairy product of these species. It helps to conquer new markets. It also improves people’s health and breeder profitability.

摘要

A2 牛奶是一种易于消化的产品，因为它只含有 A2 β-酪蛋白。在牛中，A1 和 A2 等位基因存在于种群中，A2 奶产自 A2A2 动物。对其他家养乳制品品种中的这些等位基因知之甚少。本研究旨在分析公共数据库中可用的遗传物质序列，并对基因分型的动物进行量化。分析了八种国内物种。有强有力的证据表明，国内非牛物种仅携带 A2 β-酪蛋白。由于对大量动物和水牛进行了基因分型，此处报告的山羊数据已经证实了这一点。这意味着他们自然生产 A2 牛奶，无需进行任何选择。因此，A2 牛奶更容易消化这一事实可用于增加这些物种的乳制品的价值。它有助于征服新市场。