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Genetic and morphological differentiation across a contact zone between two postglacial immigration lineages of Helianthemum nummularium (Cistaceae) in southern Scandinavia

Soubani, Eman LU ; Hedrén, Mikael LU and Widén, Björn LU (2015) In Plant Systematics and Evolution 301(5). p.1499-1508
Abstract
Helianthemum nummularium (L.) Mill. has two subspecies in southern Scandinavia, which differ in an indumentum character that is inherited as a Mendelian gene with two alleles. The dominant allele is the genetic basis for the key character of subsp. obscurum (absence of a dense felt of stellate hairs on the abaxial surface of the leaf), whereas the recessive allele is the genetic basis for the key character of subsp. nummularium (presence of a dense felt of stellate hairs). Subsp. obscurum occurs in southwest Scandinavia, whereas subsp. nummularium occurs in southeast Scandinavia. The distributions of the two subspecies overlap in a wide zone in south Sweden, where natural populations consist of a mixture of the two subspecies in various... (More)
Helianthemum nummularium (L.) Mill. has two subspecies in southern Scandinavia, which differ in an indumentum character that is inherited as a Mendelian gene with two alleles. The dominant allele is the genetic basis for the key character of subsp. obscurum (absence of a dense felt of stellate hairs on the abaxial surface of the leaf), whereas the recessive allele is the genetic basis for the key character of subsp. nummularium (presence of a dense felt of stellate hairs). Subsp. obscurum occurs in southwest Scandinavia, whereas subsp. nummularium occurs in southeast Scandinavia. The distributions of the two subspecies overlap in a wide zone in south Sweden, where natural populations consist of a mixture of the two subspecies in various proportions. Eighty-five percent of the investigated populations in this zone are polymorphic. A significant positive correlation exists between latitude/longitude across the zone and the frequency of the recessive indumentum allele. There is no significant difference in the leaf shape between the two subspecies, but there is a geographical trend across the zone. Twenty-seven populations displayed six plastid DNA haplotypes in Scandinavia. The geographic distribution of four of these haplotypes supports an eastern postglacial immigration lineage, whereas the distribution of two others haplotypes supports a postglacial immigration lineage from southwest. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Helianthemum, Hybrid zone, Plastid DNA, Indumentum, Allele frequency, Shape analysis
in
Plant Systematics and Evolution
volume
301
issue
5
pages
1499 - 1508
publisher
Springer
external identifiers
  • wos:000352724700015
  • scopus:84939979335
ISSN
1615-6110
DOI
10.1007/s00606-014-1170-1
language
English
LU publication?
yes
id
b3c2decc-d1fe-4dfc-befb-697117d76c62 (old id 5401347)
date added to LUP
2015-05-19 11:51:13
date last changed
2017-01-01 03:11:27
@article{b3c2decc-d1fe-4dfc-befb-697117d76c62,
  abstract     = {Helianthemum nummularium (L.) Mill. has two subspecies in southern Scandinavia, which differ in an indumentum character that is inherited as a Mendelian gene with two alleles. The dominant allele is the genetic basis for the key character of subsp. obscurum (absence of a dense felt of stellate hairs on the abaxial surface of the leaf), whereas the recessive allele is the genetic basis for the key character of subsp. nummularium (presence of a dense felt of stellate hairs). Subsp. obscurum occurs in southwest Scandinavia, whereas subsp. nummularium occurs in southeast Scandinavia. The distributions of the two subspecies overlap in a wide zone in south Sweden, where natural populations consist of a mixture of the two subspecies in various proportions. Eighty-five percent of the investigated populations in this zone are polymorphic. A significant positive correlation exists between latitude/longitude across the zone and the frequency of the recessive indumentum allele. There is no significant difference in the leaf shape between the two subspecies, but there is a geographical trend across the zone. Twenty-seven populations displayed six plastid DNA haplotypes in Scandinavia. The geographic distribution of four of these haplotypes supports an eastern postglacial immigration lineage, whereas the distribution of two others haplotypes supports a postglacial immigration lineage from southwest.},
  author       = {Soubani, Eman and Hedrén, Mikael and Widén, Björn},
  issn         = {1615-6110},
  keyword      = {Helianthemum,Hybrid zone,Plastid DNA,Indumentum,Allele frequency,Shape analysis},
  language     = {eng},
  number       = {5},
  pages        = {1499--1508},
  publisher    = {Springer},
  series       = {Plant Systematics and Evolution},
  title        = {Genetic and morphological differentiation across a contact zone between two postglacial immigration lineages of Helianthemum nummularium (Cistaceae) in southern Scandinavia},
  url          = {http://dx.doi.org/10.1007/s00606-014-1170-1},
  volume       = {301},
  year         = {2015},
}