GENETIC-VARIABILITY OF FAGUS-SYLVATICA L IN ITALY - THE ROLE OF POSTGLACIAL RECOLONIZATION

被引:63
作者
LEONARDI, S
MENOZZI, P
机构
[1] Istituto di Ecologia, Università di Parma, Parma, 43100, Viale delle Scienze
关键词
FAGUS SYLVATICA; GENETIC VARIABILITY; GEOGRAPHICAL VARIATION; POSTGLACIAL COLONIZATION;
D O I
10.1038/hdy.1995.101
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Genetic variability of 21 Italian populations of beech (Fagus sylvatica L.) was studied using starch gel electrophoresis and nine polymorphic enzyme gene loci. Expected mean heterozygosity varied from 13.6 per cent to 20.3 per cent. Observed heterozygosity was less than expected in all but two populations. No association between allele frequencies and soil type or altitude was found. As in other forest tree species, the among-populations component of variability was low (average F-ST=0.046). Despite low genetic differentiation, principal components analysis of allelic frequencies revealed a geographical pattern. The first principal component, significantly correlated with latitude and longitude, showed a clear separation of southern and northern populations. The statistical significance of the geographical pattern was tested by a resampling technique (bootstrap). The origin of Italian beech populations from eastern and southern refugia during the last glaciation is discussed. First principal component values and the higher allele variability found in southern populations seem to concord with the palynological evidence for a southern origin of beech in the peninsular part of Italy.
引用
收藏
页码:35 / 44
页数:10
相关论文
共 49 条
[1]  
[Anonymous], 1987, MOL EVOLUTIONARY GEN, DOI DOI 10.7312/NEI-92038
[2]  
[Anonymous], GENETIC VARIATION EU
[3]  
[Anonymous], 1971, MULTIVARIATE ANAL TE
[4]  
BERTOLDI R, 1980, Ateneo Parmense Acta Naturalia, V16, P147
[5]  
Bertoldi R., 1989, MEMORIE SOC GEOLOGIC, V42, P139
[6]   GENETIC-VARIATION OF THE CROATIAN BEECH STANDS (FAGUS-SYLVATICA L) - SPATIAL DIFFERENTIATION IN CONNECTION WITH THE ENVIRONMENT [J].
COMPS, B ;
THIEBAUT, B ;
SUGAR, I ;
TRINAJSTIC, I ;
PLAZIBAT, M .
ANNALES DES SCIENCES FORESTIERES, 1991, 48 (01) :15-28
[7]   ALLOZYMIC VARIABILITY IN BEECHWOODS (FAGUS-SYLVATICA L) OVER CENTRAL-EUROPE - SPATIAL DIFFERENTIATION AMONG AND WITHIN POPULATIONS [J].
COMPS, B ;
THIEBAUT, B ;
PAULE, L ;
MERZEAU, D ;
LETOUZEY, J .
HEREDITY, 1990, 65 :407-417
[8]   GENETIC-STRUCTURE OF THE EUROPEAN BEECH STANDS (FAGUS-SYLVATICA L) - F-STATISTICS AND IMPORTANCE OF MATING SYSTEM CHARACTERISTICS IN THEIR EVOLUTION [J].
CUGUEN, J ;
MERZEAU, D ;
THIEBAUT, B .
HEREDITY, 1988, 60 :91-100
[9]   GEOGRAPHICAL VARIATION OF LODGEPOLE PINE IN RELATION TO POPULATION HISTORY [J].
CWYNAR, LC ;
MACDONALD, GM .
AMERICAN NATURALIST, 1987, 129 (03) :463-469
[10]  
DEBEAULIEU JL, 1984, REV PALEOBIOL, P11