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1.武汉理工大学 化学化工与生命科学学院,武汉 430070
2.中国医学科学院&北京协和医学院 药用植物研究所 国家中医药管理局中药资源保护重点研究室,北京 100193
Received:04 November 2019,
Published Online:17 December 2019,
Published:05 March 2020
移动端阅览
Chu-hong YANG, Ying-xian CUI, Li-ping NIE, et al. Chloroplast Genomic Analysis of
Chu-hong YANG, Ying-xian CUI, Li-ping NIE, et al. Chloroplast Genomic Analysis of
目的:
2
测定相近石韦
Pyrrosia assimilis
叶绿体基因组,分析其序列特征并探讨相近石韦本草基因组学研究。
方法:
2
应用高通量测序技术对相近石韦进行了叶绿体全基因组测序,利用生物信息学方法分析其结构特征和系统发育关系。
结果:
2
相近石韦叶绿体基因组呈环形双链结构,全长154 964 bp,鸟嘌呤和胞嘧啶(GC)总量41.2%;共注释到131个基因,包括88个蛋白编码基因,35个转运RNA(tRNA)基因和8个核糖体RNA(rRNA)基因;共检测到43个散在重复序列和56个简单重复序列(SSR);编码亮氨酸的密码子使用频率最高,编码色氨酸的密码子数最少;叶绿体基因组全局比对分析筛选出5个高变异区(
psbA
,
rrn
16,
petA
-
psbJ
,
ndhC
-
trnM
和
psbM
-
petN
);系统发育树显示相近石韦与波氏石韦
P
.
bonii
亲缘关系较近。
结论:
2
相近石韦叶绿体基因组中非编码区变异高于编码区,大单拷贝区(LSC)和小单拷贝区(SSC)变异大于反向重复区(IR),筛选出的5个高变区可作为石韦属物种鉴定的候选DNA条形码。相近石韦的叶绿体基因组学研究为其他石韦属药用植物在分子鉴定、遗传基因转化、抗性蛋白表达及次生代谢途径解析等方面的研究提供了参考。
Objective:
2
The complete chloroplast genome of
Pyrrosia assimilis
was sequenced
its sequence characteristics was analyzed and herbgenomics of
P
.
assimilis
was discussed.
Method:
2
Its complete chloroplast genome sequence was determined through high-throughput sequencing technology
and its structural characteristics and phylogenetic relationships were analyzed by bioinformatics.
Result:
2
The chloroplast genome of
P
.
assimilis
was a circular double-chain structure with a total length of 154 964 bp
and the total content of guanine and cytosine (GC) was 41.2%. A total of 131 genes were annotated
including 88 protein-coding genes
35 transfer RNA (tRNA) genes and 8 ribosomal RNA (rRNA) genes. A total of 43 dispersed repetitive sequences and 56 simple sequence repeats (SSRs) were detected. The frequency of codon encoding leucine was the highest
while the number of codon encoding tryptophan was the lowest. Five highly divergent regions (
psbA
rrn
16
petA
-
psbJ
ndhC
-
trnM
and
psbM
-
petN
) were screened
phylogenetic analysis showed that
P
.
assimilis
was closely related to
P
.
bonii
.
Conclusion:
2
Comparative analysis of the complete chloroplast genome of
P
.
assimilis
reveals that non-coding regions exhibited a higher divergence than the coding regions
the large single copy region (LSC) and small single copy region (SSC) are more divergent than the reverse repeat region (IR)
the selected five highly variable regions can be used as specific DNA barcodes for identification of
Pyrrosia
species. Study on the chloroplast genome of
P
.
assimilis
can provide a reference for the molecular identification
genetic transformation
expression of resistance protein and secondary metabolism pathway analysis of other
Pyrrosia
medicinal plants.
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