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EST Profiling for Seed-hair Characteristic and Development of EST-SSR and SNP Markers in Carrot  

Oh, Gyu-Dong (Department of Horticultural Biotechnology, Kyung Hee University)
Hwang, Eun-Mi (Department of Horticultural Biotechnology, Kyung Hee University)
Shim, Eun-Jo (Department of Horticultural Biotechnology, Kyung Hee University)
Jeon, Sang-Jin (Breeding Research Institute, Carrotop Seed Co.)
Park, Young-Doo (Department of Horticultural Biotechnology, Kyung Hee University)
Publication Information
Horticultural Science & Technology / v.28, no.6, 2010 , pp. 1025-1038 More about this Journal
Abstract
Carrot ($Daucus$ $carota$ L. var. $sativa$) is one of the most widely used crops in the world. Moreover it is an important crop because of its high content of ${\beta}$-carotene, well-known as the precursor of vitamin A carotenoid. However, seed-hair which is generated in epidermal cell of seeds inhibits absorption and germination. For that reason, carrot seeds are commercialized after mechanical hair removal process. To overcome such cumbersome weaknesses, new breeding program for developing hairless-seed carrot cultivar has been needed. Therefore, in this study, cDNA libraries from seeds of short-hair seed phenotype CT-ATR615 OP 666-13line and hairy seed CT-ATR615 OP-CK1-9 line were constructed and expression patterns related to generation of seed-hair were analyzed by comparison of EST sequences. Differential EST sequence results between two lines were classified into FunCat functional categories based on the results of BlastX search. Higher expression quantities belonging to metabolic category were shown on short-hair seed line than hairy-seed one. Differential expression quantities between those two lines in the protein folding and stabilization, subcellular localization categories were supposed to contribute variously on the generation of seed-hair. We confirmed 50 and 59 SSR sites, and 2 SNP sites by analyzing EST sequences in two lines; thereafter, we designed SNP and SSR primer sets from these EST sequence information as a molecular marker. These markers are thought to be used in research of molecular markers for classification of carrot family and related to various traits, as well as seed-hair characteristic.
Keywords
BlastX; cDNA library; Daucus carota; FunCat;
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