Patterns of genetic differentiation in two annual bromegrasses, Bromus lanceolatus and B-hordeaceus (Poaceae)

被引：10
作者：
Ainouche, M
Misset, MT
Huon, A
机构：
[1] Laboratoire de Botanique, URA CNRS 1853, Campus Scientifique de Beaulieu
来源：
PLANT SYSTEMATICS AND EVOLUTION | 1996年 / 199卷 / 1-2期
关键词：
Ponceae; Bromus; allozyme variation; population genetics; ecogeographical differentiation;
D O I：
10.1007/BF00985918
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Infraspecific genetic differentiation was analysed in two tetraploid annual bromegrasses, Bromus lanceolatus (from N Africa) and B. hordeaceus (from N Africa and France). Genetic analysis of populations was based on allozyme polymorphisms at 17 loci. Different fixed heterozygous phenotypes were scored in both species, according to their allopolyploid origin. In N Africa, more variation occurred among populations of B. lanceolatus than of B. hordeaceus. The variation was not randomly distributed among populations of both species. In B. lanceolatus, differentiation was correlated with climatic variables rather than with geographic distance between populations. Higher correlation of genetic differentiation with geographic distance occurred in B. hordeaceus, particularly at large geographic scale, between French and N African populations. Within each region, the populations appeared weakly genetically differentiated, even when belonging to different subspecies.
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收藏
页码：65 / 78
页数：14
相关论文
共 39 条
[1]  
AINOUCHE M, 1995, IN PRESS GENOME
[2]  
AINOUCHE M, 1983, MEM SOC HIST NAT AFR, V13, P91
[3]  
BARRETT SCH, 1990, ISOZYMES PLANT BIOL, P106
[4]  
BARRETT SCH, 1990, PLANT POPULATION GEN, P282
[5]  
Brown AHD, 1981, EVOLUTION TODAY, P351
[6]  
CLEGG MT, 1972, P NATL ACAD SCI USA, V69, P1920
[7]   MULTILOCUS GENETIC-STRUCTURE OF ANCESTRAL SPANISH AND COLONIAL CALIFORNIAN POPULATIONS OF AVENA-BARBATA [J].
DELAVEGA, MP ;
GARCIA, P ;
ALLARD, RW .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1991, 88 (04) :1202-1206
[8]  
DELAVEGA MP, 1994, P NATL ACAD SCI USA, V88, P56
[9]  
DJELLOULI Y, 1988, PUBL ASS INT CLIMATO, V1, P257
[10]   GENETICS AND MORPHOLOGICAL EVOLUTION IN PLANTS [J].
GOTTLIEB, LD .
AMERICAN NATURALIST, 1984, 123 (05) :681-709
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