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| Research Progress of Chloroplast Genome in Lagerstroemia spp. |
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| DOI：10.16768/j.issn.1004-874X.2022.10.006 |
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| Abstract: |
| There are about 60 species of Lagerstroemia in the world, and more than 500 species have been cultivated.
Lagerstroemia species is an excellent garden ornamental plant. In addition to bright color and the characteristics of air
purification, it has important value in garden and horticultural applications. At present, due to the frequent interspecific
hybridization and gene introgression, the morphological classification system can not satisfy the genetic diversity study of
Lagerstroemia. With the development of modern biotechnology, studies based on chloroplast genome have shown obvious
advantages in the study of species relationship. DNA fragments and simple repeat sequences extracted from chloroplast
genomes are often used as molecular markers for identification and classification of plants. So far, the chloroplast genomes of
22 species of Lagerstroemia have been sequenced. The phylogenetic relationships of 22 species of Lagerstroemia have been
analyzed by Bayes’ method, and 22 species of Lagerstroemia are monophyletic groups. It is concluded that the chloroplast genome size is about 150 kbp, the largest is L. venusta with a length of 152 521 bp, and the smallest was L. guilinensis with a
length of 151 968 bp. The length of LSC region is 83-84 kbp, the length of SSC region is 16 kbp, the length of IR region is 25
kbp, and the content of GC in chloroplast genome is 37.6%-37.7%. The research reviews the structure of chloroplast genome
of Lagerstroemia and its application in DNA barcoding, SSR and phylogeny in order to understand the research status of the
chloroplast genomes of Lagerstroemia and improve the evaluation and understanding of the application of Lagerstroemia
in landscape architecture. It will lay a foundation for further research on germplasm resources identification, genetics and
phylogeny of Lagerstroemia based on chloroplast genome and provide data support for breeding more Lagerstroemia plants
used in garden sightseeing. |
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