Cortes M C, Hunziker J H
Estación Experimental Agropecuaria/INTA/Balcarce, C.C. 276, 7620, Balcarce, Argentina.
Genetica. 1997 Oct;101(2):115-24. doi: 10.1023/A:1018337526589.
Electrophoretic variants for seven isozyme systems - probably encoded by 18 structural gene loci - in diploid populations of Larrea divaricata and diploid and tetraploid populations of its North American vicariant derivative L. tridentata were assayed by polyacrilamide and starch gel electrophoresis. High molecular similarity of diploid and tetraploid cytotypes of L. tridentata supports the hypothesis of interracial autopolyploidy. The absence of fixed heterozygosity and additive profiles indicates a low level of divergence between the parental diploids and the tetraploids. The phenogram based on the I coefficient showed the similarities between the populations of diploid L. divaricata and also between the diploid populations of L. tridentata. Both groups of diploid populations were more distantly connected to tetraploid L. tridentata.
通过聚丙烯酰胺和淀粉凝胶电泳分析了二倍体种群的 Larrea divaricata 以及其北美替代衍生物 L. tridentata 的二倍体和四倍体种群中七个同工酶系统的电泳变体——可能由 18 个结构基因位点编码。L. tridentata 的二倍体和四倍体细胞型的高分子相似性支持了种间同源多倍体的假说。不存在固定杂合性和加性图谱表明亲本二倍体和四倍体之间的分化程度较低。基于 I 系数的聚类图显示了二倍体 L. divaricata 种群之间以及 L. tridentata 二倍体种群之间的相似性。两组二倍体种群与四倍体 L. tridentata 的联系更为疏远。
