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Frontiers of Agriculture in China

ISSN 1673-7334

ISSN 1673-744X(Online)

CN 11-5729/S

Front Agric Chin    2011, Vol. 5 Issue (4) : 524-528    https://doi.org/10.1007/s11703-011-1122-2
RESEARCH ARTICLE
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.

Keywords Chinese cabbage      chromosome      SSR primer      mixing pool      PCR screening     
Corresponding Author(s): SHEN Shuxing,Email:shensx@hebau.edu.cn   
Issue Date: 05 December 2011
 Cite this article:   
Daling FENG,Shuxin XUAN,Aixia GU, et al. PCR-based screening of BAC clones of different chromosomes in Chinese cabbage[J]. Front Agric Chin, 2011, 5(4): 524-528.
 URL:  
https://academic.hep.com.cn/fag/EN/10.1007/s11703-011-1122-2
https://academic.hep.com.cn/fag/EN/Y2011/V5/I4/524
No. of chromosomeNo. of corresponding linkage groupSSR primerRepeat motif
1A09Na10A08(CT)21
2A03Na10F06 BRMS-042(CCG)6 (AAT)4,(CT)4(T)2(CT)4
3A01ENA28
4A06ENA19
5A05ENA17
6A02Ol13E08(CT)11
7A07Ra2A05b(GT)47
8A04ENA3
9A08BRMS-033(CA)11
10A10ENA18Ni3G04b(AG)18
Tab.1  SSR primer
Fig.1  PCR-based screening of chromosome 2. M: Markers are 2000, 1000, 750, 500, 250, and 100 bp from top to bottom. A is first-level pool screening, B is second-level pool screening, and C is monoclonal screening.
No. of chromosomeMarker nameScreening clone number
1Na10A080
2Na10F061
BRMS-0424
3ENA2811
4ENA193
5ENA171
6Ol13E080
7Ra2A05b0
8ENA34
9BRMS-0336
10ENA181
Ni3G04b0
Tab.2  BAC clones screening by different linkages of SSR primers
Fig.2  Positive BAC clone screening of chromosome 10. M are markers of 2000, 1000, 750, 500, 250, and 100 bp from top to bottom. A is first-level pool screening, B is second-level pool screening, and C is monoclonal screening.
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