Objective To detect the chromosomal origin of supernumerary marker chromosome(SMC) and derivative chromosome which was obliterate in origin.

目的检测来源不明的额外标记染色体和衍生染色体。

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This article reviewed studies on chromosomal locating of resistance toBarley Yellow Mosaic Virus (BYMV) in barley. (1) Resistance gene was-located by marker gene methoud;

本文综述了大麦黄花叶病（BYMV）抗性基因的染色体定位研究。

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