ZHU Tiantian,DU Tao,JIN Ling,et al.Genetic Diversity Analysis of Isatis indigotica Germplasm Materials by Chloroplast DNA Variation and ISSR Molecular Marker[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(18):117-126.
ZHU Tiantian,DU Tao,JIN Ling,et al.Genetic Diversity Analysis of Isatis indigotica Germplasm Materials by Chloroplast DNA Variation and ISSR Molecular Marker[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(18):117-126. DOI: 10.13422/j.cnki.syfjx.20221015.
Genetic Diversity Analysis of Isatis indigotica Germplasm Materials by Chloroplast DNA Variation and ISSR Molecular Marker
To analyze the sequence variation and genetic diversity of 47
Isatis indigotica
germplasm materials, and carry out the study on the genetic differentiation and structure.
Method
2
Genomic DNA of 47
I. indigotica
germplasm materials were extracted by kit extraction method. Two chloroplast DNA (cp DNA) sequences and five inter-simple sequence repeat (ISSR) primers were used for amplification and sequencing. Chromas, Mega 7.0, DanSP5, and GenALEx were used to calibrate, splice, and analyze the sequence characteristics. PERMUT and PopGen 1.31 were used to analyze the genetic diversity parameters and genetic structure, and NTSYS was used to obtain the unweighted pair-group method with arithmetic means(UPGMA) clustering tree plot of 47
I. indigotica
germplasm materials.
Result
2
A total of 129 samples from 47
I. indigotica
germplasm materials were successfully amplified and sequenced. The length of 2 cp DNA sequences after spliced was 1 412 bp, and there were 377 polymorphic variation loci, and 36 haplotypes. Fu and Li's D* test was significant (
P
<
0.01). The values of
Pi
,
H
S
, and
H
T
based on cp DNA were 0.119 89, 0.787, and 0.891, respectively. The genetic differentiation coefficients of gene differentiation coefficient(
Gst
), nucleotide differentiation coefficient(
Nst
), and fixation index(
Fst
) were 0.117, 0.468, and 0.488, respectively, and the gene flow (
Nm
) was 0.615. The mean values of PPB, Shannon information diversity index(
I
), Nei's genetic diversity index(
H
), and
Gst
based on ISSR were 78.85%, 0.334 8, 0.218 6, and 0.754 4, respectively, and the
Nm
value was 0.162 8.
Conclusion
2
I. indigotica
has high genetic diversity and abundant haplotypes at the species level, with abundant haplotypes. Genetic differentiation among different germplasm materials is obvious, and gene exchange is not frequent. Genetic variation mainly exists among populations. The population has accumulated various low-frequency gene mutations recently, suggesting that it has experienced significant regional expansion in the history.
关键词
菘蓝种质叶绿体DNA(cp DNA)简单重复序列(ISSR)分子标记遗传变异
Keywords
Isatis indigoticagermplasmchloroplast DNA (cp DNA)inter-simple sequence repeat (ISSR)genetic variation
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