L. H. Bailey Hortorium, Cornell University, 14853, Ithaca, NY, USA.
Theor Appl Genet. 1985 Jul;70(4):369-76. doi: 10.1007/BF00273741.
The genes encoding the 18S∶25S ribosomal RNA gene repeat in soybean (Glycine max) and its relatives in the genus Glycine are surveyed for variation in repeat length and restriction enzyme site locations. Within the wild species of subgenus Glycine, considerable differences in repeat size occur, with a maximum observed in G. falcata. Repeat length and site polymorphisms occur in several species, but within individual plants only single repeat types are observed. The rDNA of the cultivated soybean and its wild progenitor, G. soja are identical at the level of this study, and no variation is found in over 40 accessions of the two species. Data from rDNA mapping studies are congruent with those of previous biosystematic studies, and in some instances give evidence of divergences not seen with other approaches.
对大豆（Glycine max）及其属内近缘种的编码 18S∶25S 核糖体 RNA 基因重复序列的基因进行了重复序列长度和限制酶位点位置的变异性调查。在亚属 Glycine 的野生种中，重复大小存在很大差异，在 G. falcata 中观察到最大差异。在几个物种中存在重复长度和位点多态性，但在单个植物中仅观察到单一重复类型。本研究水平上，栽培大豆及其野生祖先 G. soja 的 rDNA 完全相同，在两个物种的 40 多个品系中没有发现变异。rDNA 作图研究数据与以前生物系统学研究的数据一致，在某些情况下提供了其他方法未见的分歧证据。
