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首页> 外文期刊>Genetic Resources and Crop Evolution >Chloroplast DNA non-coding sequences variation in Aegilops tauschii Coss.: evolutionary history of the species
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Chloroplast DNA non-coding sequences variation in Aegilops tauschii Coss.: evolutionary history of the species

机译：牛肝菌叶绿体DNA非编码序列变异：该物种的进化史

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摘要

Sequences of four chloroplast DNA non-coding regions, about 3,000 bp in total, were analysed in 112 Aegilops tauschii accessions, 56 of ssp. tauschii and 56 of ssp. strangulata, representing all of the species range. One inversion, 8 insertions/deletions, 18 base pair substitutions and 5 microsatellite loci were found. The data revealed that Ae. tauschii originated in Caucasia. Neither of the two Ae. tauschii subspecies was an ancestor to one another. Aegilops tauschii divided into ssp. tauschii and ssp. strangulata at the very beginning of its existence as a species. Subspecies tauschii was the first to start geographic expansion and relatively rapidly occupied a vast area from Caucasia—eastward up to central Tien Shan and western Himalayas. In contrast to ssp. tauschii, geographic spread of ssp. strangulata was a complicated, multi-stage and slow process. At the beginning of ssp. strangulata evolutionary history its major phylogenetic lineage for a lengthy time span had existed as a small isolated population. Several forms of ssp. strangulata, better adapted to relatively moister and cooler habitats, had originated. Each of these forms has gradually forced out ssp. tauschii from some part of its area in the west, up to central Kopet-Dag.
机译：在112个tauschii的Aegilops tauschii品种（56个ssp）中分析了总共约3,000 bp的四个叶绿体DNA非编码区的序列。陶西（Tauschii）和ssp。56 strangulata，代表所有物种范围。发现一个倒位，8个插入/缺失，18个碱基对替换和5个微卫星基因座。数据显示，Ae。 tauschii起源于高加索。两个Ae都没有。 tauschii亚种是彼此的祖先。 taegchii的埃及盾草分为ssp。陶氏菌和ssp。 strangulata在其作为物种存在的一开始就存在。 tauschii亚种是第一个开始地理扩展的物种，从高加索地区向东直至天山中部和喜马拉雅山西部相对较快地占据了广阔的区域。与ssp相反。 tauschii，ssp的地理分布。绞窄是一个复杂，多阶段且缓慢的过程。在ssp的开头。 strangulata的进化历史长期以来，其主要的系统进化谱系以孤立的小种群存在。 ssp的几种形式。起源于更湿润和凉爽的生境的地龙。这些形式中的每一种都已逐渐淘汰了ssp。 tauschii从其西部的某个区域一直到Kopet-Dag的中部。

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