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作 者 ：卢宝荣 颜济 杨俊良

期 刊 ：云南植物研究 1988年 10卷 03期 页码：1-3

关键词：小麦族；鹅观草属；鹅观草；纤毛鹅观草；坚立鹅观草；染色体组分析；同工酶分析；

Keywords:Triticeae,

摘 要 ：本文通过对鹅观草属的三个种：鹅观草（Roegneria kamoji Ohwi）、纤毛鹅观草（R．ciliaris（Trin．）Nevski）和竖立鹅观草（R．japonensis（Honda）Keng）的染色体组分析和二种同工酶电泳酶谱的分析，研究了这三个种的系统关系。两个种均含有两个相同的染色体组。R．kamoji和R．ciliari、R.japonensis的杂种Fl减数分裂均不正常，不能结实；而R．ciliaris和 R．japonensis的正反交杂种F1 减数分裂规则，结实正常，两个种之间无生殖隔离。R. kamoji的酯酶和酸性磷酸酯酶同工酶谱与R．ciLiaris和R.japonensis有明显区别，而后二种的上述酶谱无明显差异。上述结果均一致地支持了将R. ciliaris和R.japonensis合并为一种的观点，将R．japonensis处理为R．ciliaris的变种。

Abstract:The biosystcmatic relationships among Roegneria kamoji Ohwi, K. ciliaris (Trin.) Nevski and R. japonensis (Honda) Keng in the tribe Triticeae Dumortier were studied in the present paper by the methods of gcnome analysis and clectropherogram analysis of two kinds of isozymes. The three species were all sclf-pollinatcd plants. The Fi hybrids of R. kamoji x R. ciliaris, R. kamoji x R. japonensis and R. ciliaris y. R. kamoji showed an irregular chromosome pairing in mciosis and completely no seed set; the chromosome pairing pattern was nearly 7 I + 14II . The reciprocal Fi hybrids of R. ciliaris x R, japonensis presented a regular chromosome pairing in meiosis and very high seed set) chro-mosome pairing pattern was almost 7 I; and no reproductive isolation between the two species was observed. The three species shared two common genomes (II KK or SS YY). The zymograms of esterasc and acid-phosphatasc isozymes in R. kamoji were obviously different from those in R. ciliaris and R. japonensis; but no distinct difference was found between the latter two species. Large variations in estcras and almost no variation in acid-phosphatase were observed in different populations of the three species respectively.

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