Abstract: Agropyron mongolicum keng., the narrow linear-spiked diploid species (2n = 14) from Inner Mongolia was hybridized with the broad pectinate-spiked diploid (2n = 14) A.cristatum cv.Fair-way from Montana state of America.Interspecific hybridization was conducted for combining their hard re-sistan gene from A.mongoliicum and superior quality gene from Fairway.the F₁ hybrid was diploid and morhpologically intermediate to to their parents.Chromosome pairing at metaphase I in the hybrid averaged2.09I, 4.86Ⅱ,0.48Ⅲ,0.24Ⅳand 0.19Ⅴ per cell,demonstrating that the two parental genomes are very similar.The F₁ hybrid was partially fertile so that pe opportunity was offered for gene exchange and transfer.

Key words: A.mongolicum, Fairway, Interspecific hybridization, Cytogenetic analysis

摘要： 蒙古冰草隶属于冰草属的二倍体种(2n＝14),原产于内蒙古。航道冰草是从北美引进的栽培品种隶属于扁稳冰草种,亦为二倍体种(2n＝14)。为了将蒙古冰革的优良抗性基因和航道冰草的优良品质基因相结合,进行二倍体种间的远缘杂交。杂种F1全部为二倍体,其形态学特征介于双亲之间。杂种F1PMCMⅠ的染色体平均配对构型为:2.09Ⅰ、4.86Ⅱ、0.48Ⅲ、0.24Ⅳ及0.19Ⅴ。杂种F

关键词: 蒙古冰草, 航道冰草, 种间杂交, 细胞学分析