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http://dx.doi.org/10.7235/hort.2013.13108

Construction of cDNA Library and EST Analysis Related to Seed-hair Characteristics in Carrot  

Oh, Gyu-Dong (Department of Horticultural Biotechnology, Kyung Hee University)
Shim, Eun-Jo (Department of Horticultural Biotechnology, Kyung Hee University)
Jun, Sang-Jin (Breeding Research Institute, Carrotop Seed Co.)
Park, Young-Doo (Department of Horticultural Biotechnology, Kyung Hee University)
Publication Information
Horticultural Science & Technology / v.31, no.6, 2013 , pp. 782-789 More about this Journal
Abstract
Carrot (Daucus carota L. var. sativa) is one of the most widely used crops in the world and is nutritionally important crop. However, seed-hair which is generated in epidermal cell of seeds causes the difficulty of the seedling process, because of the seed germination and absorption inhibitions. For these reasons, carrot seeds are commercialized after mechanical hair removal process. However, in this process, various damage and seed loss occur and breeding of hairless-seed carrot cultivar is needed to overcome these various weaknesses and additional seed production costs. In this study, cDNA libraries using 2 combinations, which were composed of short-hair seed CT-ATR 615 OP 666-13 & long-hair seed CT-ATR 615 OP 671-9, and short-hair seed CT-SMR 616 OP 659-1 & long-hair seed CT-SMR 616 OP 677-14, were constructed and EST sequences of each individuals were analyzed to reveal carrot seed-hair characteristics. Firstly, analyzed EST sequences were classified into FunCat functional categories. As a result, significant differences have been identified in metabolism category, protein folding and stabilization, protein binding, C-compound binding category from both of two combinations. Secondly, several candidate EST sequences related to seed trichome differentiation and cellulose biosynthetic process were selected based on GO data of EST sequences. These differences based on FunCat categories and candidate EST obtained by GO data analysis are thought to be involved in the formation of carrot seed hair. Finally, 741 SSR sites and 33 SNP sites were identified from analyzed EST sequences of two combinations. Then we designed SNP and SSR primer sets to develop molecular markers. These molecular markers will be used for classification of carrot cultivars and study seed-hair characteristic.
Keywords
BlastX; Daucus carota; FunCat; SNP; SSR;
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