Establishment Of Retrieval Database Of Tea Cultivar Resources

Tea is widely planted in China and there are many kinds of tea produced using materials from various tea cultivars. With the development of research on the healthy benefits of tea and its functional components, the demands of various teas are increasing. Tea industry is an ancient agribusiness and also a sunrise industry in the future. Tea cultivars are the basic means of tea production and important factor influcing tea yield and tea quality. In various tea producing areas where different teas are produced, tea cultivars with various morphological, physiological and chemical characteristics are needed. Agricultural informatization science is rapidly developing and widely used in plant breeding. The building of tea variety resources retrieval database based on Internet will meet the demand of independent queries of tea variety resources and the sharing tea industry information. It will be interesting for promoting the development of tea breeding and cultivation.Based on the above analysis, the present research was carried out from the following four aspects:Firstly, chemical compositions including amino acids, tea polyphenols, catechins and'caffeine in 105 tea cultivars were determined so as to providing chemical information for building the database. Secondly, data of morphological characteristic of various tea cultivars were collected through existing literatures, periodical papers and internetworks and normalization of the collected data were carried out. Thirdly, a retrieval database of tea cultivar resources is built based on ASP.NET three-tier structure, using Microsoft Access as the back-end database, C# as the programming language and SQL as the database query language. The design was carried out based on four principles, i.e., practicality, standardization, expandability and easy maintenance. Fourthly, IIS and Oray were installed so that tea cutlivars can be searched by visiting the retrieval database through the Internet by entering cultivar names, alias and/or specific terms. Information collected in the tea cultivar database includes 32-character descriptions, such as cultivar name, sprouting time, contents of amino acid, tea polyphenols, catechins, caffeine and yield potential.Highlight of innovation of the present paper includes:Firstly, data from 587 tea cultivars were scientifically and effectively managed based on economic characters. Secondly, the design was based on ASP.NET three-tier structure using ASP.NET and Microsoft Access technology, this retrieval database can easily be expended. Thirdly, the present retrieval database is a professional resources information system being exoteric to the public, which is different from other crop germplasm information system.