Genetic diversity and phylogeography in two diploid ferns, Asplenium fontanum subsp fontanum and A-petrarchae subsp bivalens, in the western Mediterranean

被引:25
作者
Hunt, H. V. [1 ,2 ]
Ansell, S. W. [1 ]
Russell, S. J. [1 ]
Schneider, H. [1 ]
Vogel, J. C. [1 ]
机构
[1] Nat Hist Museum, Dept Bot, London SW7 5BD, England
[2] Univ Cambridge, Dept Genet, Cambridge CB2 3EH, England
基金
英国自然环境研究理事会;
关键词
allozyme electrophoresis; Asplenium; chloroplast DNA; fern phylogeography; rock fern; STARCH-GEL ELECTROPHORESIS; POPULATION-STRUCTURE; POSTGLACIAL COLONIZATION; BREEDING SYSTEMS; GLACIAL REFUGIA; LATE QUATERNARY; PATTERNS; HETEROZYGOSITY; DISTRIBUTIONS; CONSEQUENCES;
D O I
10.1111/j.1365-294X.2009.04402.x
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
Asplenium fontanum subsp. fontanum and A. petrarchae subsp. bivalens are diploid rock ferns of limestone outcrops of the western Mediterranean region. Asplenium fontanum subsp. fontanum occurs from Valencia through northeastern Spain to the Alpes-Maritimes and Swiss Jura. Asplenium petrarchae subsp. bivalens occurs only on Majorca, in Valencia and possibly in southern Spain. We analysed allozyme and chloroplast genetic marker diversity in 75 populations of A. fontanum subsp. fontanum and 12 populations of A. petrarchae subsp. bivalens sampled from across their respective ranges. The two species show similar levels of species and population genetic diversity to one another and to other diploid European Asplenium taxa. Both are predominantly outbreeding, as indicated by F-IS = 0.108 and 0.167 respectively. Substantial between-population differentiation results largely from differentiation between regions. Isolation by distance operates over limited geographic ranges, up to 50 km. In A. fontanum subsp. fontanum, the major geographical differentiation between Valencia and the rest of the taxon range probably represents an ancient range fragmentation. A less pronounced differentiation divides populations in the SW from those in the NE of the range, with evidence for a biogeographic link between the eastern Pyrenees and southeastern France. High diversity in the Pyrenees may either represent ancient population differentiation, or a suture zone. In A. petrarchae subsp. bivalens, populations on Majorca exhibit a subset of the genetic diversity present in Valencia, although the two regions are strongly differentiated by differing allele frequencies. Dispersal from the mainland may have founded Majorcan populations, although a role for in situ island survival cannot be excluded.
引用
收藏
页码:4940 / 4954
页数:15
相关论文
共 71 条
[1]  
[Anonymous], 1978, EVOLUTION GENETIC PO
[2]  
[Anonymous], ATLAS PRESENT POLLEN
[3]  
[Anonymous], [No title captured]
[4]  
BENNERT HW, 1990, FARNBLATTER, V21, P15
[5]  
CARRO FJP, 1992, ANALES JARDIN BOT MA, V49, P187
[6]  
Casgrain P., 2001, The R package for multivariate and spatial analsis
[7]   Genetic variation in rare and common plants [J].
Cole, CT .
ANNUAL REVIEW OF ECOLOGY EVOLUTION AND SYSTEMATICS, 2003, 34 :213-237
[8]  
Comps B, 2001, GENETICS, V157, P389
[9]   POPULATION GENETIC CONSEQUENCES OF SMALL POPULATION-SIZE - IMPLICATIONS FOR PLANT CONSERVATION [J].
ELLSTRAND, NC ;
ELAM, DR .
ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS, 1993, 24 :217-242
[10]   Detecting the number of clusters of individuals using the software STRUCTURE: a simulation study [J].
Evanno, G ;
Regnaut, S ;
Goudet, J .
MOLECULAR ECOLOGY, 2005, 14 (08) :2611-2620