Low allozymic variation in the Bidens pilosa L. complex (Asteraceae)

被引：8

作者：

Grombone-Guaratini, MT

Semir, J

Solferini, VN

机构：

[1] Univ Estadual Campinas, Inst Biol, Dept Bot, Campinas, SP, Brazil

[2] Univ Estadual Campinas, Inst Biol, Dept Genet & Evolucao, Campinas, SP, Brazil

来源：

BIOCHEMICAL GENETICS | 2005年 / 43卷 / 7-8期

基金：

巴西圣保罗研究基金会;

关键词：

allozyme; Bidens pilosa complex; genetic variability; plastic genotypes; weed species;

D O I：

10.1007/s10528-005-6774-2

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Bidens alba, B. subalternans, and B. pilosa form a complex group based on their morphological similarities. Bidens pilosa L. and B. subalternans DC. are herbs with a wide distribution in agricultural and disturbed areas. Bidens alba (L.) DC. varies in size from herb to subshrub and has a coastal distribution. Enzyme electrophoresis was used to evaluate genetic diversity in 12 populations of Bidens. All but three loci (Lap-1, Est, and Got) were monomorphic. Est-1 and Got were polymorphic only in B. alba. Lap-1 was polymorphic only in B. pilosa and B. subalternans. The estimates of genetic variability were low for all three taxa and all of the populations studied. Genetic diversity varied from 0.01 to 0.03. Mean genetic identities were high among populations of each species (0.99 for B. alba and 1.00 for B. pilosa and B. subalternans) and among the three species (1.00). Bidens pilosa and B. subalternans could be considered a single species if the taxonomy of the group were based solely on isozyme data.

引用

页码：335 / 345

页数：11

共 45 条

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