【摘要】 本文综合应用体细胞染色体分带、杂交一代 PMc MI 染色体构型统计和同工酶分析,研究了偃麦草属三个种的染色体组构成。结果表明:中间偃麦草不含与小麦同源的 B 组,有两个组部分同源,其染色体组可用 xE₁E₂表示。长穗偃麦草（10x）也不含 B 组,有四个组两两部分同源,是部分同源异源十倍体,染色体组公式为 xE₁E₁F₁F₂。四倍体偃麦草的两个染色体组间缺少同源性。更多还原

【Abstract】 The karyotype,C-banding,N-banding and meiosis of F₁ plants and isoenzyme electro- phoresis were analysed for the study of three species in Agropyron.It was showed that the B genome homologous to common wheat is not likely to exist in A.intermedium and the other two genomes were turned out to be homoeologous.The genome formula xE₁ E₂ was suggested for A.intermedium.The B genome was found not likely to exist in A.elongate. （10x）either,there are two pairs of homoeologous genomes in this species and the genome formula xE₁E₂F₁F₂ was suggested.It seemed that the two genomes of A.elongata（Ax）are not homoeologous.更多还原