甘肃省栽培当归染色体组型及其核仁组织者区域的研究

应用常规染色体制片技术和ＡｇＮＯ＿３分带技术对产于甘肃岷县和渭源县的两个栽培当归居群的染色体核型和ＮＯＲｓ作了研究。结果表明：两个栽培当归居群的染色体数目均为２ｎ＝２２，它们与野生当归核型的差异较大。两个居群之间的差异虽较小，但已发现有一定的形态分歧。为此，作者认为染色体分析可能会成为今后优良当归类群选育的辅助指标之一。

The Karyotypes and NORs of Two Cultivated Strains of Agnelica sinensis(Oliv)Diels

The karyoytpes and NORs of two native strains of A. sinensis cultivated in Minand Weiyuan counties in Gansu were studied by the conventional chromosomal preparationand AgNO_3 banding methods. The results revealed that the diploid numbers of these twostrains were 2n=22. The karyotypes were consisted of 10 subtelocentric,2 submetacentricand 10 telocentric chromosomes for the strain from Min county, and 8 subtelocentric, 4 sub-metacentric and 10 tolecentric chromosomes for the strain from Weiyuan county. There wasa pair of satellites and a pair of NORs located on the external short arms of the 4th and 3rdchromosome of the strains from Min anid Weiytian counties respectively. It was found that there were a little differences between the cultivated and wild A.sinensis.