Phylogeny and maternal donors of Elytrigia Desv. sensu lato (Triticeae; Poaceae) inferred from nuclear internal-transcribed spacer and trnL-F sequences.
Phylogeny and maternal donors of Elytrigia Desv. sensu lato (Triticeae; Poaceae) inferred from nuclear internal-transcribed spacer and trnL-F sequences.
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Elytrigia Desv 的系统发育和母体供体。
DOI：
10.1186/s12870-017-1163-7
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发表时间：
2017-11-21
影响因子：
5.3
通讯作者：
Zhou YH
中科院分区：
文献类型：
--
作者：
Yang Y;Fan X;Wang L;Zhang HQ;Sha LN;Wang Y;Kang HY;Zeng J;Yu XF;Zhou YH
背景：偃麦草属是小麦族中形态、细胞学、生态学和分布多样的一个属。偃麦草属的分类和系统地位仍有争议。利用核内转录间隔区（nrITS）序列和叶绿体trnL-F区序列研究了偃麦草属（Elytrigia Desv.）结果：（1）E、F、P、St和W基因组之间的亲缘关系较近，与H和Ns基因组的亲缘关系较远。Ee和Ebare同性恋。(2)在Est基因组物种中，E基因组是二倍体含E基因组的偃麦草属物种的起源，St基因组是假鹅观草属物种的起源。(3)二倍体种Et. elongata分化。(4)Et. stipifolia和Et.根据nrITS数据，varnensis序列是多样的。(5)Et. Lolioides含有St和H基因组，属于Escherichus s. L. (6)偃麦草属E基因组二倍体种是Et. nodosa（PI547344），Et. farcta等。蓬蒂卡湖密花属（Pycnantha，Et.）scirpea和Et.斯基西卡。至少有两个物种作为异源多倍体（Est和EStP基因组）的母体供体。L.不同的物种含有不同的基因组，应划分为不同的属。然而，偃麦草属物种间的基因组关系密切。二倍体种由于渐渗和不同的地理来源而被区分。研究结果还表明，同一物种和不同物种的相同基因组具有不同的母体供体。进一步的分子生物学和细胞学研究将有助于我们对系统发育结果进行更具体、更准确的评价。
Background:Elytrigia Desv. is a genus with a varied array of morphology, cytology, ecology, and distribution in Triticeae. Classification and systematic position of Elytrigia remain controversial. We used nuclear internal-transcribed spacer (nrITS) sequences and chloroplast trnL-F region to study the relationships of phylogenetic and maternal genome donor of Elytrigia Desv. sensu lato.Results:(1) E, F, P, St, and W genomes bear close relationship with one another and are distant from H and Ns genomes. Eeand Ebare homoeologous. (2) In ESt genome species, E genome is the origin of diploid Elytrigia species with E genome, St genome is the origin of Pseudoroegneria. (3) Diploid species Et. elongata were differentiated. (4) Et. stipifolia and Et. varnensis sequences are diverse based on nrITS data. (5) Et. lolioides contains St and H genomes and belongs to Elymus s. l. (6) E genome diploid species in Elytrigia serve as maternal donors of E genome for Et. nodosa (PI547344), Et. farcta, Et. pontica, Et. pycnantha, Et. scirpea, and Et. scythica. At least two species act as maternal donor of allopolyploids (ESt and EStP genomes).Conclusions:Our results suggested that Elytrigia s. l. species contain different genomes, which should be divided into different genera. However, the genomes of Elytrigia species had close relationships with one another. Diploid species were differentiated, because of introgression and different geographical sources. The results also suggested that the same species and the same genomes of different species have different maternal donor. Further study of molecular biology and cytology could facilitate the evaluation of our results of phylogenetic in a more specific and accurate way.
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影响因子：
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作者：
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通讯作者：
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DOI：
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发表时间：
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期刊：
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