MATING SYSTEM AND GENETIC DIFFERENTIATION IN DASYPYRUM-VILLOSUM (POACEAE) IN ITALY

被引：8

作者：

DEPACE, C ^{[1
]}

QUALSET, CO ^{[1
]}

机构：

[1] UNIV CALIF DAVIS,GENET RESOURCES CONSERVAT PROGRAM,DAVIS,CA 95616

来源：

PLANT SYSTEMATICS AND EVOLUTION | 1995年 / 197卷 / 1-4期

关键词：

POACEAE; TRITICEAE; ISOZYME VARIATION; MORPHOLOGICAL VARIATION; POPULATION DIVERGENCE; MATING SYSTEM; RDNA RFLP;

D O I：

10.1007/BF00984637

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Genetic differentiation at the morphological, isozyme, and DNA levels among seven Dasypyrum villosum (Poaceae, Triticeae, 2n = 14, VV genomes) populations from Italy was studied. A measure of the mating system was also obtained. Genetic diversity was mainly distributed within populations (90%) rather than among populations (10%), typical for most allogamous species. Interpopulation diversity, however, was greatest between the most geographically distant populations (about 750 km apart, 911 m altitude difference). The mating system was estimated to vary from 55 to 100% outcrossing. One population (I-16, Bomarzo) deviated from the others in its uniform early flowering habit and presence of isozyme alleles not found in other populations. It had genetic diversity similar to other populations for isozyme (Got-V2, Got-V3, and Est-VF) and ribosomal RNA (Nor-Vl) loci. This population is believed to be the product of a few migrant founder seeds and its unique characters point out that generalized population biology parameters of genetic diversity are not sufficient for describing species variation nor for developing conservation strategies.

引用

页码：123 / 147

页数：25

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