Using SSR Markers from Brassica juncea Transcriptome for Germplasm Analysis
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摘要:
目的 为开发高效的芥菜Brassicajuncea.分子标记。 方法 本研究通过对芥菜转录组测序的信息搜索SSR位点并分析其分布特点,应用Primer 3.0软件设计SSR引物,随机选择 50 对引物扩增44 份芥菜种质,检测其多态性。 结果 芥菜转录组测序共获得55 636条unigene,全部序列有48 193 376 bp;有7 834条unigene包含SSR的序列,从中鉴定出9 526个SSR位点,其中有1 371条序列包含1个以上SSR,复合SSR有572个,SSR发生频率为14.08%。优势重复基序为三核苷酸和二核苷酸,分别占总SSR的51.12%和41.91%。二核苷酸重复基元中以AG/CT为优势重复基元,占总位点的34.74%,三核苷酸重复基元以AAG/CTT为主,占总位点的18.30%。共设计出21 282对SSR引物,随机选择 50 对引物进行 PCR 扩增,其中41对扩增出清晰可重复的预期条带,17对(占34%)在 44 份芥菜种质中表现出多态性。应用UPGMA得到将44份供试材料分为4大类聚类图,可准确地体现了芥菜种质材料的关系。 结论 根据芥菜转录组数据能开发出类型丰富、效率较高的SSR标记,为芥菜亲缘关系分析和遗传图谱构建等提供更可靠的标记。 Abstract:Objective To search for applicable molecular markers for studying Brassica juncea. Method SSR sites were searched from transcriptional sequencing of B. juncea. Potential primers were designed using Primer 3.0, and polymorphisms of 44 B. juncea germplasms detected from randomly selected 50 pairs of primers for the investigation. Result Totally, 55,636 unigenes were obtained from the transcriptome sequencing. The entire sequence was 48,193,376bp with 9,526 SSR loci identified from 7,834 unigenes at a rate of 14.08%. Of the loci, 1,371 contained more than one SSR locus and 572 compound loci. Of the major repeat types, 51.12% were trinucleotide dominated by AGA/TCT (18.30%), and 41.91% dinucleotide dominated by AG/CT (34.74%). Using Primer 3.0, from 21,282 pairs of SSR primers, 50 were randomly selected for the PCR amplification. Out of 44 amplifications, 41 showed clear and reproducible bands, and 17 with polymorphisms. The 44 germplasms were classified into 4 distinctive groups by UPGMA. Conclusion The SSR markers with high frequency and polymorphism could be acquired from the transcriptome to be used for the genetic diversity analysis and mapping construction on B. juncea. -
Key words:
- Brassica juncea /
- transcriptome /
- simple sequence repeat /
- polymorphism
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表 1 44份芥菜种质材料主要性状
Table 1. Major properties of 44 B. juncea germplasms
编号
Code品种名称
Cultivar品种来源
Source株型
Plant type叶特征(叶形、叶面光滑与否、有无刺毛、蜡粉)
Leaf characteristics(leaf shape, smooth or not, with or without bristles, wax powder)抽䑓性
Bolting property结球性(是/否)
Heading ability(Y/N)食用器官
Edible organ1 龙岩青皮芥菜
Longyan Green Mustard福建龙岩市
Fujian Longyan直立
Upright卵圆形、皱、无刺毛、无蜡粉
Ovoid, wrinkled, spineless, no wax powder中
Medium否
No茎
Stem2 连城紫芥菜
Liancheng Pulse Purple Mustard福建龙岩市
Fujian Longyan开展
Expansion阔椭圆、微皱、无刺毛、有蜡粉
Broad oval, slightly wrinkled, spineless, wax powder中
Medium否
No叶
Leaf3 抗热四季
ok甜芥菜
Hot Resistant Four Seasons OK Sweet Mustard广西横县
Guangxi Hengxian直立
Upright阔椭圆、平滑、无刺毛、有蜡粉
Broad oval, smooth, spineless, wax powder早
Early否
No叶
Leaf4 华517 Hua517 湖北武汉市
Hubei Wuhan直立
Upright倒卵、微皱、无刺毛、无蜡粉
Obovate, slightly wrinkled, spineless, no wax powder中
Medium否
No茎
Stem5 厦门芥菜
Xiamen Mustard福建龙岩市
Fujian Longyan开展
Expansion扇形、皱、无刺毛、有蜡粉
Fan-shaped, wrinkled, spineless, wax powder中
Medium否
No叶
Leaf6 华515 Hua515 华中农大
Central China Agricultural University开展
Expansion阔椭圆、皱、无刺毛、无蜡粉
Broad oval, wrinkled, spineless, no wax powder中
Medium否
No叶
Leaf7 平和芥菜
Pinghe Mustard福建龙岩市
Fujian Longyan直立
Upright椭圆、微皱、无刺毛、有蜡粉
Oval, slightly wrinkled, spineless, wax powder中
Medium否
No叶
Leaf8 特选竹芥菜
Selected Bamboo Mustard广东广州市
Guangdong Guangzhou直立
Upright阔椭圆、平滑、无刺毛、有蜡粉
Broad oval, smooth, spineless, wax powder早
Early否
No叶
Leaf9 龙岩长茎芥菜2
Longyan Long stem Mustard 2北京市
Beijing直立
Upright卵圆形、皱、无刺毛、无蜡粉
Ovoid, wrinkled, spineless, no wax powder中
Medium否
No茎
Stem10 细叶雪里蕻
Spire Potherb Mustard福建龙岩市
Fujian Longyan半直立
Semi-upright倒披针、平滑、无刺毛、有蜡粉
Inverted lanceolate, smooth, spineless, wax powder中
Medium否
No叶
Leaf11 龙岩芥菜3
Longyan Mustard 3福建龙岩市
Fujian Longyan半直立
Semi-upright倒卵、皱、无刺毛、有蜡粉
Obovate, wrinkled, spineless, wax powder中
Medium否
No茎
Stem12 客家甜芥菜
Kejia Mustard广东兴宁市
Guangdong Xingning半直立
Semi-upright阔椭圆、平滑、无刺毛、有蜡粉
Broad oval, smooth, spineless, wax powder早
Early否
No叶
Leaf13 四季甜客家芥
Four-season sweet hakka Mustard江西宜春市
Jiangxi Yichun直立
Upright阔椭圆、平滑、无刺毛、有蜡粉
Broad oval, smooth, spineless, wax powder早
Early否
No叶
Leaf14 本地大菜
Local Mustard广东兴宁市
Guangdong Xingning直立
Upright倒卵、皱、无刺毛、有蜡粉
Obovate, wrinkled, spineless, wax powder早
Early否
No叶
Leaf15 张白土茎用芥菜
Zhangbaitu stem Mustard福建龙岩市
Fujian Longyan直立
Upright卵圆形、皱、无刺毛、无蜡粉
Ovoid, wrinkled, spineless, no wax powder中
Medium否
No茎
Stem16 漳州芥菜2
Zhangzhou Mustard福建龙岩市
Fujian Longyan直立
Upright倒卵、皱、无刺毛、有蜡粉
Obovate, wrinkled, spineless, wax powder早
Early否
No叶
Leaf17 特选大坪埔大肉包心芥菜
Specially selected Dapingpu big meat stuffed mustard广西横县
Guangxi Hengxian开展
Expansion扁圆、皱、无刺毛、无蜡粉
Oval, wrinkled, spineless, no wax powder中
Medium是
Yes叶球
Leaf Bulb18 广东鸡那菜
Guangdong jina Mustard福建龙岩市
Fujian Longyan直立
Upright倒披针、微皱、无刺毛、有蜡粉
Inverted lanceolate, slightly wrinkled, spineless, wax powder早
Early否
No叶
Leaf19 美口宽杆芥菜
Meikou Mustard甘肃省武威市
Gansu Wuwei开展
Expansion卵圆、皱、无刺毛、有蜡粉
Ovoid, wrinkled, spineless, wax powder晚
Later否
No叶
Leaf20 闽清大芥菜
Minqin big Mustard福建福州市
Fujian Fuzhou半直
Upright倒卵、微皱、无刺毛、无蜡粉
Obovate, slightly wrinkled, spineless, no wax powder中
Medium否
No叶
Leaf21 精品大肉大坪包心芥
Premium Dapingpu big meat stuffed Mustard江西宜春市
Jiangxi Yichun开展
Expansion扁圆、皱、无刺毛、有蜡粉
Oval, wrinkled, spineless, wax powder中
Medium是
Yes叶球
Leaf Bulb22 台湾芥菜1
Taiwan Mustard福建龙岩市
Fujian Longyan半直立
Semi-upright长倒卵、平滑、无刺毛、无蜡粉
Long obovate, smooth, spineless, no wax powder中
Medium否
No叶
Leaf23 宽帮青菜
Wide petiole Mustard四川省绵阳市
Sichuan Mianyang开展
Expansion阔椭圆、微皱、无刺毛、有蜡粉
Broad oval, slightly wrinkled, spineless, wax powder中
Medium否
No叶
Leaf24 四川大肉青
Sichuan big meat Mustard四川省广汉市
Sichuan Guanghan开展
Expansion阔倒卵、皱、无刺毛、有蜡粉
Broad oval, wrinkled, spineless, wax powder中
Medium否
No叶
Leaf25 华513 Hua513 湖北武汉市
Hubei Wuhan开展
Expansion倒卵、微皱、有刺毛、无蜡粉
Obovate, slightly wrinkled, spine, no wax powder中
Medium否
No叶
Leaf26 华512 Hua512 湖北武汉市
Hubei Wuhan开展
Expansion阔椭圆、微皱、有刺毛、无蜡粉
Broad oval, slightly wrinkled, spine, no wax powder中
Medium否
No叶
Leaf27 华516 Hua516 湖北武汉市
Hubei Wuhan开展
Expansion阔椭圆、微皱、有刺毛、有蜡粉
Broad oval, slightly wrinkled, spine, wax powder中
Medium否
No叶
Leaf28 上杭毛芥菜
Shanghang Hairy Mustard福建龙岩市
Fujian Longyan半直立
Semi-upright卵圆形、微皱、有刺毛、无蜡粉
Ovoid, slightly wrinkled, spine, no wax powder中
Medium否
No叶球
Leaf Bulb29 宽叶厚肉高脚芥
Broadleaf Thick Meat Tall Mustard广东兴宁市
Guangdong Xingning直立
Upright倒卵、微皱、无刺毛、有蜡粉
Obovate, slightly wrinkled, spine, wax powder中
Medium否
No叶
Leaf30 连城芥菜
Liancheng Mustard福建龙岩市
Fujian Longyan直立
Upright卵圆形、皱、无刺毛、有蜡粉
Ovoid, wrinkled, spineless, wax powder中
Medium否
No茎
Stem31 香港客家甜芥菜
Hong Kong Hakka Sweet Mustard广东兴宁市
Guangdong Xingning半直立
Semi-upright阔椭圆、平滑、无刺毛、有蜡粉
Broad oval, smooth, spineless, wax powder极早
Very Early否
No叶
Leaf32 福州宽杆芥菜
Fuzhou Wide pole Mustard福建福州
Fujian Fuzhou半直立
Semi-upright阔椭圆、皱、无刺毛、有蜡粉
Broad oval, slightly wrinkled, spineless, wax powder中
Medium否
No叶
Leaf33 闽清大挂菜
Minqing Large Mustard福建福州
Fujian Fuzhou半直立
Semi-upright倒卵、微皱、无刺毛、有蜡粉
Obovate, slightly wrinkled, spine, wax powder中
Medium否
No叶
Leaf34 特选甜脆客家芥菜
Special sweet and crisp Hakka Mustard广东深圳市
Guangdong Shenzhen半直立
Semi-upright阔椭圆、平滑、无刺毛、有蜡粉
Broad oval, smooth, spineless, wax powder极早
Very Early否
No叶
Leaf35 皱叶芥
Crinkle Mustard福建龙岩市
Fujian Longyan直立
Upright阔椭圆、皱、无刺毛、无蜡粉
Broad oval, smooth, spineless, wax powder中
Medium是
Yes叶球
Leaf Bulb36 永定客家芥
Yongding Mustard福建龙岩市
Fujian Longyan直立
Upright卵圆形、皱、无刺毛、有蜡粉
Ovoid, wrinkled, spineless, wax powder中
Medium否
No茎
Stem37 万安客家芥菜
Wanan Mustard福建龙岩市
Fujian Longyan直立
Upright倒卵、微皱、无刺毛、有蜡粉
Obovate, slightly wrinkled, spine, wax powder中
Medium否
No茎
Stem38 桂林甜芥菜薹
Guilin Mustard Stalk广西横县
Guangxi Hengxian开展
Expansion阔椭圆、平滑、无刺毛、无蜡粉
Broad oval, smooth, spineless, no wax powder中
Medium是
Yes叶、花
Leaf and Flower 薹
Bolting39 绿欣芥菜
Luxin Mustard福建龙岩市
Fujian Longyan直立
Upright倒卵、皱、无刺毛、有蜡粉
Obovate, wrinkled, spine, wax powder中
Medium否
No茎
Stem40 龙芥1号
Long Mustard 1福建龙岩市
Fujian Longyan直立
Upright卵圆形、皱、无刺毛、有蜡粉
Ovoid, wrinkled, spineless, wax powder中
Medium否
No茎
Stem41 大排芥菜
Dapai Mustard福建龙岩市
Fujian Longyan直立
Upright阔椭圆、微皱、无刺毛、有蜡粉
Broad oval, slightly wrinkled, spineless, wax powder中
Medium是
Yes叶球
Leaf Bulb42 紫脉芥
Purple vein Mustard福建龙岩市
Fujian Longyan开展
Expansion倒卵、皱、无刺毛、有蜡粉
Obovate, wrinkled, spine, wax powder中
Medium否
No叶
Leaf43 台湾芥菜2 Taiwan Mustard 2 福建龙岩市
Fujian Longyan开展
Expansion阔倒卵、微皱、无刺毛、有蜡粉
Broad oval, slightly wrinkled, spineless, wax powder中
Medium是
Yes叶球
Leaf Bulb44 龙岩长茎芥菜
Longyan Long stem Mustard福建龙岩市
Fujian Longyan直立
Upright卵圆形、皱、无刺毛、有蜡粉
Ovoid, wrinkled, spineless, wax powder中
Medium否
No茎
Stem表 2 芥菜SSR的类型分布
Table 2. Distribution of SSR types in B. juncea
SSR类型
SSR type重复次数 Repeat number 总计
Total比例/%
Ratio4 5 6 7 8 9 10 11~14 ≥ 15 二核苷酸 Di 0 0 1 510 1 011 645 362 226 134 104 3 992 41.91 三核苷酸 Tri 0 3 108 1 185 403 78 20 32 29 15 4 870 51.12 四核苷酸 Tetra 273 55 17 5 1 0 1 0 0 308 3.70 五核苷酸 Penta 99 24 6 1 2 0 0 1 0 122 1.40 六核苷酸 Hexa 133 34 4 4 2 0 0 2 0 183 1.87 总计 Total 505 3 221 2 722 1 424 728 382 259 166 119 9 526 比例% Ratio 5.30 33.82 28.57 14.95 7.64 4.01 2.72 1.74 1.25 100 表 3 芥菜转录中不同SSR重复基序出现的频率
Table 3. Frequency of different SSR repeat motifs in B. juncea transcriptome
SSR类型
SSR type重复基序种类数
Repeat species重复基序类型
Repeat motif type数量
Number发生频率/%
Frequency比例/%
Proportion二核苷酸 Di 4 AG/CT 3 309 34.74 82.89 AC/GT 388 4.07 9.72 AT/AT 291 3.05 7.29 CG/CG 4 0.04 0..10 三核苷酸 Tri 10 AAG/CTT 1743 18.30 35.79 AGG/CCT 827 8.68 16.98 ATC/ATG 740 7.77 15.20 AAC/GTT 461 4.84 9.47 ACC/GGT 390 4.09 8.00 AGC/CTG 320 3.36 6.57 CCG/CGG 138 1.45 2.83 ACG/CGT 94 0.99 1.93 ACT/AGT 83 0.87 1.70 AAT/ATT 74 0.78 1.52 四核苷酸 Tetra 25 AAAG/CTTT 74 0.78 24.02 AAAC/GTTT 68 0.71 22.08 AAGG/CCTT 41 0.43 12.99 AATC/ATTG 40 0.43 12.99 其他 Other 85 0.89 27.60 五核苷酸 Penta 41 AAGAG/CTCTT 14 0.15 11.48 AATCG/ATTCG 13 0.14 10.66 AAAAC/GTTTT 12 0.13 9.84 其他 Other 83 0.87 68.03 六核苷酸 Hexa 92 AAGGAG/CCTTCT 15 0.16 8.20 AAGAGG/CCTCTT 12 0.13 6.56 AAAAAC/GTTTTT 10 0.10 5.46 其他 Other 146 1.53 79.78 表 4 芥菜17对SSR多态性引物信息
Table 4. Information on 17 pairs of SSR primers for studying polymorphism of B. juncea
引物名称
Primer name引物序列(5′→3′)
Primer sequenceSSR基元
SSR motif产物长度/bp
Length of product多态条带数
Number of polymorphic bands多态信息量
PICBaSSR002 TCACCGAGCTTCTTCGTCTT/CTCCTTTCTATTCGGTTGCG (AG)9 235 3 0.54 BaSSR003 TGACTTGGGCCAAAGCTTAC/CACTTCTCTTTCGGGTCCAG (AG)20 247 3 0.63 BaSSR007 CCTCTCCGAATCAAGTCTCG/TGTTAAACCTCAACCTCGCA (AG)9 286 1 0.43 BaSSR009 GGGAACATACATATCAGATTGTGG/TTCCCACAGAAGCCATTCTC (AG)23 225 3 0.67 BaSSR012 ACGAAACCCCAGAAGAAAGC/GATCATTCCTCCCCTCTTCC (AGA)7 181 3 0.71 BaSSR013 AAAGTGGAACCCTGTGAACG/AATCGGCGGTAACTCCTTCT (GAA)8 264 2 0.58 BaSSR015 TGGATAAGGGAACAAGGCTG/GAAGATTCACGAGCTCCAGG (GCT)8 241 3 0.58 BaSSR016 AGCACCTCACCAAACTGGAC/CAACAGTTCCAGCAGCTTCA (TGC)8 169 2 0.53 BaSSR019 GAAGTCTTTGCGATTGAGAAAAA/TCCCATTGTACACGACCCTT (GAA)15 280 4 0.72 BaSSR020 CAAAAAGTGGGTTCGAGGAG/CGCAAAACTCTTCCTTCCAC (AAG)7 238 3 0.71 BaSSR022 CATCACCTAACCGATTGCCT/TCTTGTTTCTGTGGCGTGAG (AACC)6 131 3 0.70 BaSSR023 GTCGAGAGAACCTTTCGTGC/GCCCATATCAGCCTCGTTTA (TTTC)7 257 2 0.51 BaSSR032 TAAGGAAGGCGAAAGTTGGA/AGAGAATCAGCTTCCCGTCA (TTGGT)7 249 2 0.53 BaSSR037 GATTCTCTTTCGCGATTCGT/ATCTTGTTTTCGCCCTGACA (TTTGG)6 278 2 0.53 BaSSR043 TAGCTGCAGCAACAATCGTC/GATGTGCAAGCAAGGATTGA (AAAAG)5 217 2 0.47 BaSSR045 TCCATCTGAACGGTTCTTTG/CATAGATCCATTGCTTAGCGG (CTGTTA)6 185 2 0.50 BaSSR046 CACGAATGTGAAGCAGCAGT/GTAGCCAGGTCGTGGTTGTT (CACCCA)5 277 6 0.82 -
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