Isozymes in Larrea divaricata and Larrea tridentata (Zygophyllaceae):: A study of two amphitropical vicariants and autopolyploidy

被引：19

作者：

Cortes, MC

Hunziker, JH

机构：

[1] Inst Bot Darwin, RA-1642 San Isidro, Argentina

[2] INTA Balcarce, Estac Expt Agropecuatia, RA-7620 Balcarce, Argentina

来源：

GENETICA | 1997年 / 101卷 / 02期

关键词：

amphitropical vicariants; autopolyploidy; isozymes; Larrea;

D O I：

10.1023/A:1018337526589

中图分类号：

Q3 [遗传学];

学科分类号：

071007 ; 090102 ;

摘要：

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.

引用

页码：115 / 124

页数：10

共 27 条

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