【摘要】 研究了毛茛科鸭跖花属OxygraphisBunge 3种植物的核形态。其间期核均为复杂中央染色微粒型 ,前期染色体为中间型 ,染色体基数为x =8。脱萼鸭跖花O .delavayi的染色体明显大于鸭跖花O .glacialis和细叶鸭跖花O .tenuifolia的染色体。结果支持鸭跖花属是毛茛科毛茛亚族subtrib .Ranunculi nae的一个自然成员以及脱萼鸭跖花可能是该属的原始种的观点。更多还原

【Abstract】 Three species of the genus Oxygraphis Bunge (Ranunculaceae) were karyomorphologically studied. The interphase nuclei of complex chromocenter type, prophase chromosomes of interstitial type and basic chromosome number of x=8 were common to all the three species examined, but the chromosomes of O. delavayi were markedly larger than those of O. glacialis and of O. tenuifolia . The results support the viewpoints that Oxygraphis is a natural member of the subtribe Ranunculinae Spach, tribe Ranunculeae DC. in the subfamily Ranunculoideae and that O. delavayi might be the primitive species of this genus.更多还原