The complete chloroplast genome of Walla Patta,Gyrinops walla(Thymelaeaceae), an agarwood-producing tree species from Sri Lanka

Abstract

Gyrinops walla is an important agarwood-producing tree and threatened species from Sri Lanka. Herein, we assembled and characterized the complete chloroplast (cp) genome of G. walla as a genomic resource for conservation purposes. The 175,130 bp long genome is comprised of 87,376 bp large single-copy (LSC) and 3316 bp small single-copy (SSC) regions, which are separated by two inverted repeat (IR) region, each with a size of 42,291 bp. A total of 140 genes were predicted for the cp genome, which includes 94 protein-coding, 38 tRNA, and eight rRNA genes. Phylogenetic analysis showed that G. walla is fully resolved in a sister position to Aquilaria in the family Thymelaeaceae. The data provided will be useful for study on the molecular phylogenetics and evolution of Thymelaeaceae in the future.

Advancements in agarwood germplasm resources, quality evaluation, and formation mechanism

“…沉香行业早期按照产地将沉香划分为莞香 系、惠安系和星洲系, 其中莞香系(中国的海南、广 东、广西和云南等地)主要基原植物为白木香(可能混 有少量云南产云南沉香); 惠安系(越南、柬埔寨、泰 国、老挝、缅甸等国家和地区)主要基原植物为柯拉 斯那沉香; 而星洲系(马来西亚、印尼、文莱、菲律 宾、巴布亚新几内亚等国家和地区)主要基原植物为 马来沉香和小果沉香 [7,11] . 属于同一亚群, 而瓦拉拟沉香植物则为进化关系的外 群 [13,14] . DNA条形码研究发现马来沉香植物叶绿体来 源的matK可在种间水平区分物种, 结合ITS(核基因)和 trnL-trnF则可区分同种植物的亚种 [15,16] .…”