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首页> 外文期刊>Genome >Decoding ice plants: challenges associated with barcoding and phylogenetics in the diverse succulent family Aizoaceae
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Decoding ice plants: challenges associated with barcoding and phylogenetics in the diverse succulent family Aizoaceae

机译：解码冰植物：在不同多肉质家庭中与条形码和系统发育相关的挑战

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摘要

Aizoaceae is the largest succulent plant family in the world, including in excess of 1800 species. Despite its richness, a large proportion of its taxa are listed as data deficient and as such, has been identified as the top priority for taxonomic research in South Africa. Limitations to accurate taxonomic identification of taxa in the family may be partly attributed to the degree of technical knowledge required to identify taxa in the Aizoaceae. DNA barcoding may provide an alternative method of identification; however, the suitability of commonly used gene regions has not been tested in the family. Here, we analyse variable and parsimony informative characters (PIC), as well as the barcoding gap, in commonly used plastid regions (atpB-rbcL, matK, psbA-trnH, psbJ-petA, rpl16, rps16, trnD-trnT, trnL-trnF, trnQ-rps16, and trnS-trnG) and the nuclear region ITS (for Aizooideae only) across two subfamilies and two expanded clades within the Aizoaceae. The relative percentage of PIC was much greater in subfamilies Aizooideae and Mesembryanthemoideae than in Ruschioideae. Although nrITS had the highest percentage of PIC, barcoding gap analyses identified neither ITS nor any chloroplast region as suitable for barcoding of the family. From the results, it is evident that novel barcoding regions need to be explored within the Aizoaceae.
机译：Aizoaceae是世界上最大的多汁植物家庭，包括超过1800种。尽管其丰富性，但大部分的分类群被列为数据缺乏，因此已被确定为南非的分类学研究的首要任务。对家庭中最准确的分类学分类识别的限制可能部分归因于鉴定AizoAceae识别出征的技术知识的程度。 DNA条形码可以提供一种替代的鉴定方法;然而，常用的基因区域的适用性尚未在家庭中进行测试。在这里，我们分析可变和分析信息性质（PIC），以及常用的塑性区域（ATPB-RBCL，MATK，PSBA-TRN，PSBJ-PETA，RPL16，RPS16，TRND-TRNT，TRNL- TRNF，TRNQ-RPS16和TRNS-TRNG）和核区域（仅适用于AIZOOIDEAE），横跨两种亚属植物和两种扩大的植物内的植物中的植物。亚属嗜哪种子脂膜和枸杞中的相对百分比大得多比在鲁西葡萄原体中。尽管NRITS具有最高百分比的PIC，但是条形码间隙分析既不均不适用于家庭的条形码的叶绿体区域。从结果中，很明显，需要在Aizoaceae内探索新的条形码区域。

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