关键词:黄麻; EST; SSR; 标记开发; 多态性 Development and Universality Evaluation of EST-SSR Markers from GenBank in Jute ZHANG Li-Wu**, YUAN Min-Hang**, HE Xiong-Wei, LIU Xing, FANG Ping-Ping, LIN Li-Hui, TAO Ai-Fen, XU Jian-Tang, QI Jian-Min* Key Laboratory for Genetics, Breeding and Multiple Utilization of Crops of Ministry of Education / College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China ** Contributed equally to this work Fund: AbstractIn this study, a total of 838 jute expressed sequence tags (EST) were derived from GenBank. Using software Primer 3.0, 66 pairs of primers were designed based on the simple sequence repeat (SSR) sites screened by the online program SSRPrimer. These primers were amplified in six jute accessions of different types to test their polymorphism. The agarose gel electrophoresis results showed that 42 pairs of primers (63.6%) were polymorphic between at least two accessions and the PCR products were clear and stable fragment. These polymorphic EST-SSRs contained rich motif (AT)n or (AC-)n, which could be considered as the dominant motif in jute genome. Therefore, it is effective to develop SSR markers in jute from ESTs deposited in GenBank. The EST-SSRs developed will not only facilitate genetic research in jute (Corchorus spp.), but also enrich molecular markers of jute genome, which is the basis for various studies in molecular biology.
续表4 黄麻EST-SSR的多态性和扩增效率 Continued 4 Amplified and polymorphic primers of EST-SSR in jute
标记 Marker
GenBank ID
重复基元 Repeat
片段大小 Predicted product size (bp)
左引物 退火温度 Left primer Tm
右引物 退火温度 Right primer Tm
扩增产物 Amplification
多态性Polymor -phism
条带数 No. of bands
带型 Scorability
CcSSR039
365732703
(TCT)9
242
57.7
59.8
+
+
2
A
CcSSR040
365732731
(CAA)4
222
59.2
57.4
+
+
2
A
CcSSR041
375150553
(ACAT)5
114
57.7
59.2
+
-
1
A
CcSSR042
375150558
(CT)6
178
59.0
58.8
+
+
3
A
CcSSR043
375150561
(CAA)6
200
58.1
57.0
+
+
2
B
CcSSR044
375150562
(CCT)4
249
60.3
58.5
+
+
2
B
CcSSR045
375150586
(TGC)4
189
60.0
60.0
+
+
2
B
CoSSR046
311146658
(TGG)9
160
59.8
60.0
+
-
1
B
CoSSR047
311157368
(TGG)9
165
59.8
58.8
+
-
1
B
CoSSR048
311157371
(GCT)6
152
59.5
57.6
+
-
1
B
CoSSR049
150174518
(TCTTT)3
202
57.0
57.4
+
+
2
B
CoSSR050
1112000549
(CCT)5
243
59.6
58.9
+
+
1
A
CoSSR051
1112000555
(AAC)5
232
57.7
60.1
+
+
2
A
CoSSR052
1112000578
(CAT)6
220
57.2
60.0
+
+
2
A
CoSSR053
1112000581
(TGCT)3
229
60.0
60.1
+
+
2
B
CoSSR054
1112000583
(GAA)5
178
59.6
60.0
+
+
2
A
CoSSR055
1112000590
(TGG)5
235
60.3
60.2
+
+
2
B
CoSSR056
1112000595
(ATAAA)4
113
60.2
57.2
+
-
1
B
CoSSR057
1112000596
(TCTCA)5
224
59.7
58.9
+
+
2
A
CoSSR058
1112000618
(TAATA)4
150
57.4
59.3
+
+
2
A
CoSSR059
1112008416
(TCA)6
233
57.4
59.2
+
-
1
A
CoSSR060
1112008423
(GATG)3
153
59.8
59.3
+
-
1
A
CoSSR061
1112008466
(TCT)5
166
59.3
59.8
+
-
1
A
CoSSR062
1112008468
(TA)7
250
57.3
58.7
+
+
2
A
CoSSR063
1112008500
(TTTC)3
228
59.9
59.8
-
-
No
No
CoSSR064
1112008512
(AT)8
300
58.9
58.0
+
+
2
A
CoSSR065
1112000586
(CAG)6
229
60.9
58.3
+
+
2
A
CoSSR066
1112000637
(TTC)4
103
59.7
59.8
-
-
No
No
ABCD表示电泳带型清晰等级, A为最清晰的带型。+表示扩增条带存在, -表示不存在。 ABCD represents the scorability of amplification, and A is the most clear. +: the presence of amplification; -: the absence of amplification.
续表4 黄麻EST-SSR的多态性和扩增效率 Continued 4 Amplified and polymorphic primers of EST-SSR in jute
4 结论利用GenBank公共EST数据库成功开发出66对SSR引物, 这些SSR标记具有较好的稳定性和多态性。(AT)n重复基元和(AC-)n丰富的三核苷酸重复基元多态性高, 可作为黄麻SSR标记引物设计的首选。 The authors have declared that no competing interests exist. 作者已声明无竞争性利益关系。
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