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比较叶绿体基因组分析表明,与中国茶相比,印度茶(阿萨姆种 cv TV1)起源不同。

Comparative analysis of chloroplast genomes indicated different origin for Indian tea (Camellia assamica cv TV1) as compared to Chinese tea.

机构信息

ICAR-National Institute for Plant Biotechnology, LBS Centre, IARI, New Delhi, 110012, India.

Tocklai Tea Research Institute, Tea Research Association, Jorhat, Assam, 785008, India.

出版信息

Sci Rep. 2021 Jan 8;11(1):110. doi: 10.1038/s41598-020-80431-w.

Abstract

Based upon the morphological characteristics, tea is classified botanically into 2 main types i.e. Assam and China, which are morphologically very distinct. Further, they are so easily pollinated among themselves, that a third category, Cambod type is also described. Although the general consensus of origin of tea is India, Burma and China adjoining area, yet specific origin of China and Assam type tea are not yet clear. Thus, we made an attempt to understand the origin of Indian tea through the comparative analysis of different chloroplast (cp) genomes under the Camellia genus by performing evolutionary study and comparing simple sequence repeats (SSRs) and codon usage distribution patterns among them. The Cp genome based phylogenetic analysis indicated that Indian Tea, TV1 formed a different group from that of China tea, indicating that TV1 might have undergone different domestications and hence owe different origins. The simple sequence repeats (SSRs) analysis and codon usage distribution patterns also supported the clustering order in the cp genome based phylogenetic tree.

摘要

根据形态特征,茶树在植物学上分为 2 个主要类型,即阿萨姆和中国,它们在形态上非常不同。此外,它们之间很容易相互授粉,因此也描述了第三个类别,柬埔寨类型。虽然茶的起源被普遍认为是印度、缅甸和中国毗邻地区,但中国和阿萨姆类型茶的确切起源尚不清楚。因此,我们试图通过对茶树属不同叶绿体(cp)基因组进行进化研究,并比较它们之间的简单重复序列(SSR)和密码子使用分布模式,来了解印度茶的起源。基于 cp 基因组的系统发育分析表明,印度茶 TV1 与中国茶形成了不同的群体,表明 TV1 可能经历了不同的驯化,因此起源不同。简单重复序列(SSR)分析和密码子使用分布模式也支持 cp 基因组基于系统发育树的聚类顺序。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c357/7794434/fa0fa0df3b8a/41598_2020_80431_Fig1_HTML.jpg

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