Sustainable vegetable production requires the constant development of new resilient varieties that are suited to a variable climate. These new varieties must also keep up with consumer preference and satisfy demand. Pak Choi (Bok choy) or Chinese cabbage is known as one of the most important vegetables for human nutrition in East, Northeast and Southeast Asia (Zhu et al., 2013). The consumption of Pak Choi in Europe and North America has increased year-on-year owing to its relatively mild flavour, versatility, and marketability. Pak Choi is a collection of petioles that rise from the base. Consumers expect a perfect product, however, the crop is susceptible to a range of physiological problems, such as stem cracking and post-harvest deterioration. Through the use of of modern sequencing technologies combined with diverse Brassica rapa accessions this project aims to determine the genetic basis of key quality traits in Pak Choi and establish a molecular breeding pipe line.