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PCR-based screening of BAC clones of different chromosomes in Chinese cabbage |
Daling FENG1,2, Shuxin XUAN1, Aixia GU1, Airu MA1, Jiuhuan LI1, Shuxing SHEN1() |
1. College of Horticulture, Agricultural University of Hebei, Baoding 071001, China; 2. College of Life Science, Agricultural University of Hebei, Baoding 071001, China |
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Abstract In this paper, taking SSR and functional gene sequence as the primers and the plasmid of first- and second-level pools of bacterial artificial chromosome (BAC) library as templates, the PCR method was used for specific clones of different chromosomes in Chinese cabbage. The results showed that the number of positive clones was 1–11 per primer and the average number of clone was 3.9 by screening 19200 clones of BAC library using 12 pairs of SSR primers from 10 linkage groups individually, which were nearly consistent with about 3.4 times of genome coverage. Positive clones were acquired in chromosome Nos. 2 to 5 and 8 to 10 without screening with the positive clones in chromosome Nos. 1, 6, and 7. In addition, the primer of FLC1 functional gene of chromosome No. 10 was used for PCR screening, and two BAC clones containing FLC1 gene were acquired. Therefore, different specific BAC clones of chromosomes were taken by using SSR primer and functional gene primer. Specific clone screening of chromosomes could provide a probe for identifying the chromosome accurately. Meanwhile, the BAC library screening method was optimized, serving as an effective technical means for quick BAC clone screening.
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Keywords
Chinese cabbage
chromosome
SSR primer
mixing pool
PCR screening
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Corresponding Author(s):
SHEN Shuxing,Email:shensx@hebau.edu.cn
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Issue Date: 05 December 2011
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