No genetic substructuring in Artemisia subgenus Tridentatae despite strong ecotypic subspecies selection

Autor:	Edward M. Golenberg, D. Carl Freeman, E. Durant McArthur, David J. Stanton
Rok vydání:	2002
Předmět:	Genetic divergence Genetics Taxon Intergenic region Phylogenetic tree Evolutionary biology Haplotype Subgenus Biology Subspecies Biochemistry Ecology Evolution Behavior and Systematics Gene flow
Zdroj:	Biochemical Systematics and Ecology. 30:579-593
ISSN:	0305-1978
DOI:	10.1016/s0305-1978(01)00118-1
Popis:	Phylogenetic relationships within the subgenus Tridentatae of Artemisia (Asteraceae) were investigated using nuclear ITS and plastid intronic and intergenic sequences in the region of trn L Although the studied taxa are quite distinct morphologically and ecologically, extremely low levels of genetic divergence (average nucleotide differences among haplotypes is π =0.0040 and π =0.0019, for ITS and trn L, respectively) were observed. Haplotype networks indicate the common haplotypes are widely distributed both geographically and taxonomically and are marked by a high connectivity to other haplotypes. These patterns are consistent with older alleles distributed in populations. These results imply that differentiation within the Tridentatae is the result of strong ecotypic selection over a background of widespread hybridization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8982ec65a771993356bfd08150bc35e3 https://doi.org/10.1016/s0305-1978(01)00118-1 Zobrazit plný text záznamu Full Text from ScienceDirect