小麦族鹅观草属三个物种的关系研究

Relation studies on Roegneria amurensis, R.ciliaris and R.japonensis(Poaceae:Triticeae)

关键词:  鹅观草属  毛叶鹅观草  纤毛鹅观  竖立鹅观草  形态学  染色体组  减数分裂

Key words:  Roegneria  R.amurensis  R.ciliaris  R.japonensis  morphology  genome  meiosis

摘要:

通过形态学特征比较、种间杂交、染色体组配对和繁育学资料,探讨鹅观草属拟披碱草组纤毛草系中的三个物种毛叶鹅观草、纤毛鹅观草和竖立鹅观草间的亲缘关系。结果表明毛叶鹅观草与纤毛鹅观草、竖立鹅观草存在一定的生殖障碍,纤毛鹅观草和竖立鹅观草不存在生殖障碍。建议将毛叶鹅观草作为纤毛鹅观草的亚种,而竖立鹅观草作为纤毛鹅观草的变种处理较为适宜。

Abstract:

According to morphology,chromosome pairing,and fertility,the genomic constitution and the relationship of three species of Roegneria were investigated,and make sure of. The main result is that:it had a little of generative obstacle between R.amurensis and R.ciliaris or R.amurensis and R.japoensis,but no between R.ciliaris and R.japonensis. It was supposed that R.amurensis should be the subspecies of R.ciliaris,and R.japonensis should be the variety of R.ciliaris.