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近几年,叶绿体DNA的研究越来越受到重视,因为叶绿体不仅是植物光合作用的器官,而且DNA分子结构紧凑,相对于核DNA而言,分子量小,结构简单,更易从分予水平上作精细分析。另外,叶绿体DNA具有稳定性、进化缓慢性及编码序列的保守性,因而是研究植物系统发育的好材料。虽然在许多植物中,叶绿体DNA分子非常保守,环状结构大
In recent years, more and more attention has been paid to the research of chloroplast DNA because chloroplasts are not only the organs of plant photosynthesis, but also the structure of DNA molecules is compact. Compared with nuclear DNA, chloroplast has the advantages of low molecular weight, simple structure and easy grading Fine analysis. In addition, chloroplast DNA has the characteristics of stability, evolutionary slowness and conservation of coding sequence, and therefore is a good material for studying the phylogeny of plants. Although in many plants chloroplast DNA molecules are very conserved, the ring structure is large