草地学报

›› 1997, Vol. 5 ›› Issue (4): 221-227.DOI: 10.11733/j.issn.1007-0435.1997.04.001

• 研究论文 •    下一篇

冰草的远缘杂交及杂种分析

云锦凤, 李瑞芬, 米福贵   

  1. 内蒙古农牧学院, 呼和浩特市, 010018
  • 出版日期:1997-11-15 发布日期:1997-11-15
  • 基金资助:
    国家自然科学基金39560060

Interspecific Hybridization and Hybrid Analysis of Crested Wheatgrass

Yun Jinfeng, Li Ruifen, Mi Fugui   

  1. Inner Monglia Institute of Agricultural and Animal Husbandry, Huhhot 010018
  • Online:1997-11-15 Published:1997-11-15

PDF

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

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