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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：小麦 Triticum aestivum - Aegilops triuncialis 渗入系中脆性轴的基因的遗传定位。

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摘要

Aegilops triuncialis L. (2n=4 x =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 gamma -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 Br124(Brittle rachis of 124/00i) 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 gamma -irradiation.
机译：Aegilops triuncialis L.（2n = 4 x = 28，基因组公式UUCC）已用于获得“阿森纳收藏”之一，即 Triticum aestivum L的远缘杂交。渗入线124/00 i ，它是从 T的交叉处得到的。玉米“ Rodina”，带有 Ae的伽玛射线辐照的花粉。 Triuncialis 。但是，不希望有的基因可以被掺入到来自Ae的栽培品种中。 Triuncialis 。 Ae的峰值。 Triuncialis 与穗状花序底部单个节上的茎分开。它被定义为突触孢子渗漏。但是，在每个小尖峰下方，124/00 i 的尖峰出乎意料地脱开，显示出楔形脱节。脆性rachis基因 Br 124 （脆性rachis为124 / 00 的> i ）等位基因位于3A染色体短臂上的 Br2 。通过微卫星定位， Br 124 基因被 Xbarc19 （20.3 cM）和 Xgwm779括起来.1 （14.3 cM）位于3A染色体的短臂上。目前的研究表明，从突触孢子渗入到楔形脱节的显性突变发生在 Ae的配子中。 Triicialis 当 Ae。 Triuncialis花粉经伽马射线辐照处理。

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