The structure of the Aegilops tauschii genepool and the evolution of hexaploid wheat
The structure of the Aegilops tauschii genepool and the evolution of hexaploid wheat
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DOI：
10.1007/s001220050942
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发表时间：
1998-09-01
影响因子：
5.4
通讯作者：
Zhang, HB
中科院分区：
文献类型：
--
作者：
Dvorak, J;Luo, MC;Zhang, HB
研究了六倍体小麦（Triticum aestivum）和稻瘟病菌（Aegilops tauschii） D基因组中53个单拷贝位点、rRNA位点Nor3和高分子量谷蛋白位点Glu1的限制性内切片段长度多态性。白纹伊蚊遗传变异分布。tauschii提示伊蚊和伊蚊之间的基因流动。tauschii ssp。绞杀藤和ssp。在伊朗有，但在外高加索较少。“strangulata”基因库比它在形态学基础上显示的更宽，包括ssp。在外高加索和东南（东南）里海伊朗和ssp。伊朗中北部和里海西南部。在后一个区域，Ae。陶氏形态变种‘meyeri’和‘typica’与ssp等距。它们都属于“strangulata”基因库。Ae的进化模型。Tauschii被提出。在地理区域的基础上，所有调查的T. aestivum形式的D基因组与外高加索，特别是亚美尼亚和伊朗里海西南部的“strangulata”基因库最接近。这表明，T. aestivum的主要起源地区是亚美尼亚，但里海的西南沿海地区和两个地区之间的走廊也可能发挥了作用。在所有被研究的脱粒和去壳型稻螟的D基因组中，几乎没有发现遗传分化，而且所有稻螟似乎都共享一个D基因组基因库。陶氏菌亲本参与了陶氏菌的进化。
Polymorphism in the lengths of restriction fragments at 53 single-copy loci, the rRNA locus Nor3, and the high-molecular-weight glutenin locus Glu1 was investigated in the D genome of hexaploid Triticum aestivum and that of Aegilops tauschii, the source of the T. aestivum D genome. The distribution of genetic variation in Ae. tauschii suggests gene flow between Ae. tauschii ssp. strangulata and ssp. tauschii in Iran but less in Transcaucasia. The "strangulata" genepool is wider than it appears on the basis of morphology and includes ssp. strangulata in Transcaucasia and southeastern (SE) Caspian Iran and ssp. tauschii in northcentral Iran and southwestern (SW) Caspian Iran. In the latter region, Ae. tauschii morphological varieties 'meyeri' and 'typica' are equidistant to ssp. strangulata in Transcaucasia, and both belong to the "strangulata" genepool. A model of the evolution of Ae. tauschii is presented. On the geographic region basis, the D genomes of all investigated forms of T. aestivum are most closely related to the "strangulata" genepool in Transcaucasia, Armenia in particular, and SW Caspian Iran. It is suggested that the principal area, of the origin of T. aestivum is Armenia, but the SW coastal area of the Caspian Sea and a corridor between the two areas may have played a role as well. Little genetic differentiation was found among the D genomes of all investigated free-threshing and hulled forms of T. aestivum, and all appear to share a single D-genome genepool, in spite of the fact that several Ae. tauschii parents were involved in the evolution of T. aestivum.