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Table 1 Distribution of microsatellites GSSRs (BSSRs), and ESSRs) of carrot*

From: Microsatellite isolation and marker development in carrot - genomic distribution, linkage mapping, genetic diversity analysis and marker transferability across Apiaceae

  GSSRs BSSRs ESSRs
SSR type Count (%) Mean # of repeat units/mean SSR length (bp) Most frequent motifs Count (%) Mean # of repeat units/mean SSR length (bp) Densityǂ(SSR/Mb) Most frequent motifs Count (%) Mean # of repeat units/mean SSR length (bp) Densityǂ(SSR/Mb) Most frequent motifs
Dinucleotide 116 (46.8) 10.0/21.2 AG(61), AC(34) 39 (16.7) 7.8/15.5 22.4 AT(46), AC, AG 207 (25.2) 8.1/16.5 54.1 AG(78), AC
Trinucleotide 28 (11.3) 7.0/21.3 AAC, AGT, AAG 97 (41.5) 4.3/12.9 55.7 AAG(27), AAC(17), AGT(13), ACT(12), AAG(27) 411 (50.1) 4.4/13.1 107.5 AAG(25), ACT(15), AGG(10), AGC(10)
Tetranucleotide 98 (39.5) 5.9/26.2 ACAT (59), AAAC 57 (24.4) 3.3/12.2 32.8 AAAT(33), AATT(21) 129 (15.7) 3.1/12.3 33.7 AAAG, AAAT
Pentanucleotide 2 (0.8) 3.0/15.0 - 27 (11.5) 3.0/15.2 15.5 AAAAG, AGCCG 29 (3.5) 3.1/15.7 7.6 AGCCC
Hexanucleotide 2 (0.8) 3.0/18.0 - 7 (3.0) 3.0/18.0 4.0 - 39 (4.8) 3.2/18.9 10.2 AAAAAG, AAAGAG
Heptanucleotide 0 (0) 3.0/21.0 - 4 (1.7) 3.0/21.0 2.3 - 4 (0.5) 3.0/21.0 1.0 -
Octanucleotide 2 (0.8) 3.0/24.0 - 3 (1.3) 3.0/24.0 1.7 - 2 (0.2) 3.5/28.0 0.5 -
Total perfect SSRs 248 (100) 7.9/23.1   234 (100) 4.4/13.9 134.5   821 (100) 5.0/14.2 214.8  
Compound SSRs 41 (16.5) -/49.9   6 (2.6) -/38.3 3.4   26 (3.1) -/32.9 6.8  
Total seq. (Mbp)ζ 0.04    1.74     3.82    
GC content (%) 37.9    38.3     42.3    
  1. * A minimum of 6 repeat units (r.u.) for dinucleotides, 4 r.u. for trinucleotides, and 3 r.u. for tetra-, penta-, hexa- hepta- and octanucleotides were used as parameters for searching microsatellites in genomic and EST sequence of carrot. ǂ Only density values for SSRs from BAC end sequences (BSSRs) and from ESTs (ESSRs) are presented (because GSSRs derive from an SSR-enriched library, analyses of this dataset would result in an overestimation of the SSR density in genomic DNA). SSR motif considering complementary (e.g., "AAG" includes AAG + CTT motifs); SSR motifs occurring at a rate of at least 5% of the total are listed with occurrence as percentage within each SSR type class in parentheses; SSR classes without predominance of a particular motif are denoted as "-". ζ Total length of sequences analyzed. γ Includes both GSSRs and BSSRs.