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首页> 外文期刊>Journal of genetics >Nucleotide diversity and phylogenetic relationships among Gladiolus cultivars and related taxa of family Iridaceae
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Nucleotide diversity and phylogenetic relationships among Gladiolus cultivars and related taxa of family Iridaceae

机译：鸢尾泡菜品种的核苷酸多样性和系统发育关系

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摘要

The plastid genome regions of two intergenic spacers, psbA-trnH and trnL-trnF, were sequenced to study the nucleotide diversity and phylogenetic relationships among Gladiolus cultivars. Nucleotide diversity of psbA-trnH region was higher than trnL-trnF region of chloroplast. We employed Bayesian, maximum parsimony (MP) and neighbour-joining (NJ) approaches for phylogenetic analysis of Gladiolus and related taxa using combined datasets from chloroplast genome. The psbA-trnH and trnL-trnF intergenic spacers of Gladiolus and related taxa-like Babiana, Chasmanthe, Crocus, Iris, Moraea, Sisyrinchium, Sparaxis and two out group species (Hymenocallis littoralis and Asphodeline lutea) were used in the present investigation. Results showed that subfamily Iridoideae have sister lineage with subfamily Ixioideae and Crocoideae. H. littoralis and A. lutea were separately attached at the base of tree as the diverging Iridaceae relative's lineage. Present study revealed that psbA-trnH region are useful in addressing questions of phylogenetic relationships among the Gladiolus cultivars, as these intergenic spacers are more variable and have more phylogenetically informative sites than the trnL-trnF spacer, and therefore, are suitable for phylogenetic comparison on a lower taxonomic level. Gladiolus cultivars are extensively used as an ornamental crop and showed high potential in floriculture trade. Gladiolus cultivation still needs to generate new cultivars with stable phenotypes. Moreover, one of the most popular methods for generating new cultivars is hybridization. Hence, information on phylogenetic relationships among cultivars could be useful for hybridization programmes for further improvement of the crop.
机译：为了研究唐菖蒲品种间的核苷酸多样性和系统发育关系，对两个基因间间隔区psbA-trnH和trnL-trnF的质体基因组进行了测序。叶绿体psbA-trnH区的核苷酸多样性高于trnL-trnF区。我们使用来自叶绿体基因组的组合数据集，采用贝叶斯、最大简约（MP）和邻接（NJ）方法对唐菖蒲及其相关分类群进行系统发育分析。本研究使用了唐菖蒲和相关分类群（如巴比亚纳、查斯曼特、番红花、鸢尾、桑属、剑麻属、Sparacis）的psbA-trnH和trnL-trnF基因间隔区，以及两个外类群物种（沿海膜壳藻和黄体水仙花水仙花水仙花水仙花水仙花水仙花水仙花水仙花水仙花水仙花水仙花水仙花水仙花水仙花水仙花水仙草）。结果表明，环烯醚萜亚科与硬蜱亚科和番红花亚科有姊妹谱系。红毛鸢尾和黄毛鸢尾分别附着在树的底部，作为鸢尾科亲缘的分支。目前的研究表明，psbA-trnH区域有助于解决唐菖蒲品种间的系统发育关系问题，因为这些基因间间隔子比trnL-trnF间隔子更可变，具有更多系统发育信息位点，因此，适合在较低的分类水平上进行系统发育比较。唐菖蒲品种作为观赏作物被广泛使用，在花卉产业中显示出巨大的潜力。唐菖蒲栽培仍需培育表型稳定的新品种。此外，培育新品种最常用的方法之一是杂交。因此，品种间亲缘关系的信息可用于进一步改良作物的杂交计划。

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