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首页> 外文期刊>Genetic Resources and Crop Evolution >Genetic mapping of the gene for brittle rachis in a Triticum aestivum—Aegilops triuncialis introgression line
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Genetic mapping of the gene for brittle rachis in a Triticum aestivum—Aegilops triuncialis introgression line

机译：普通小麦-黑麦草（Aegilops triuncialis）基因渗入系中脆性轴的基因的遗传定位

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Aegilops triuncialis L. (2n = 4x = 28, genome formula UUCC) has been used to obtain one of the “Arsenal collection”, the distant hybridization of Triticum aestivum L. The introgression line 124/00i, which was derived from the cross of T. aestivum ‘Rodina' with γ-irradiated pollen of an accession of Ae. triuncialis. However, undesirable genes can be incorporated into the cultivated varieties from Ae. triuncialis. The spikes of Ae. triuncialis disarticulate from stems at a single node at the bottom of the spikes. It was defined as a synaptospermic diaspore. However, the spike of 124/00i unexpectedly disarticulate below each spikelet showing wedge type of disarticulation. The brittle rachis gene Br 124 (B rittle r achis of 124 /00 i ) of 124/00i was allelic to Br2 located on the short arm of chromosome 3A. From the microsatellite mapping, the Br 124 gene was bracketed by Xbarc19 (20.3 cM) and Xgwm779.1(14.3 cM) on the short arm of chromosome 3A. The present study suggested that the dominant mutation from synaptospermic diaspore to wedge type disarticulation occurred in the gamete of Ae. triuncialis when Ae. triuncialis pollen was treated with γ-irradiation.
机译：Aegilops triuncialis L.（2n = 4x = 28，基因组公式UUCC）已用于获得“小麦集合体”之一，即普通小麦的远缘杂交。渗入系124/00 i ，它是从普通小麦（Roys。T. Rodina）与γ射线辐射的花粉（Ae）的花粉杂交而来。 Triuncialis。但是，不希望有的基因可以掺入到Ae的栽培品种中。 Triuncialis。 Ae的穗状花序。 Triuncialis与穗状花序底部的单个节上的茎分开。它被定义为滑膜透孔性孢子。但是，在每个小尖峰下方，124/00 i 的尖峰出人意料地脱开，显示出楔形脱节。 124/00 i 的脆性rachis基因Br 124 （B rittle r achis 124/00 i ）等位基因位于3A染色体的短臂。根据微卫星定位，Br 124 基因在3A染色体短臂上被Xbarc19（20.3 cM）和Xgwm779.1（14.3 cM）括起来。本研究表明，从突触精子渗入到楔形脱节的显性突变发生在Ae的配子中。 Triuncialis当Ae。用γ射线处理了Triuncialis花粉。

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