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Inheritance of a hair character in Helianthemum oelandicum var. canescens and allele frequencies in natural populations

Widén, Björn LU (2017) In Plant Systematics and Evolution p.1-17
Abstract

Helianthemum oelandicum var. canescens (Hartm.) Fr. is an endemic taxon with a restricted distribution (less than 10 km2) in the southernmost part of the Baltic island of Öland, SE, Sweden. The taxon varies with respect to stellate hairs. Most plants can be classified into two morphs, the stellated morph (with a dense carpet of stellate hairs on the abaxial surface of the leaves) and the bristled morph (without a carpet of stellate hairs). In crosses between plants assumed to be homozygous for the trait that characterises the phenotypes of the two morphs, F1 offspring was indistinguishable from the bristled morph. Segregation in F2 did not deviate from the expected 3:1 ratio (bristled morph/stellated morph), indicating one... (More)

Helianthemum oelandicum var. canescens (Hartm.) Fr. is an endemic taxon with a restricted distribution (less than 10 km2) in the southernmost part of the Baltic island of Öland, SE, Sweden. The taxon varies with respect to stellate hairs. Most plants can be classified into two morphs, the stellated morph (with a dense carpet of stellate hairs on the abaxial surface of the leaves) and the bristled morph (without a carpet of stellate hairs). In crosses between plants assumed to be homozygous for the trait that characterises the phenotypes of the two morphs, F1 offspring was indistinguishable from the bristled morph. Segregation in F2 did not deviate from the expected 3:1 ratio (bristled morph/stellated morph), indicating one major gene with a dominant allele for the phenotype of the bristled morph and a recessive allele for the phenotype of the stellated morph. Besides the Mendelian inheritance of the presence/absence of a whitish cover of stellate hairs, the density of hairs appeared to be further modified by quantitative genes. The frequency of the recessive allele for the phenotype of the stellated morph varied among populations and showed a geographical structure. Possible mechanisms behind the spatial variation in indumentum are discussed.

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author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Allele frequency, Helianthemum, Major gene, Mendelian inheritance, Pubescence
in
Plant Systematics and Evolution
pages
17 pages
publisher
Springer
external identifiers
  • scopus:85029789837
ISSN
0378-2697
DOI
10.1007/s00606-017-1457-0
language
English
LU publication?
yes
id
f73d46d8-f24a-4575-8f99-903f60b6c4c2
date added to LUP
2017-10-05 13:23:40
date last changed
2018-01-07 12:20:48
@article{f73d46d8-f24a-4575-8f99-903f60b6c4c2,
  abstract     = {<p>Helianthemum oelandicum var. canescens (Hartm.) Fr. is an endemic taxon with a restricted distribution (less than 10 km<sup>2</sup>) in the southernmost part of the Baltic island of Öland, SE, Sweden. The taxon varies with respect to stellate hairs. Most plants can be classified into two morphs, the stellated morph (with a dense carpet of stellate hairs on the abaxial surface of the leaves) and the bristled morph (without a carpet of stellate hairs). In crosses between plants assumed to be homozygous for the trait that characterises the phenotypes of the two morphs, F1 offspring was indistinguishable from the bristled morph. Segregation in F2 did not deviate from the expected 3:1 ratio (bristled morph/stellated morph), indicating one major gene with a dominant allele for the phenotype of the bristled morph and a recessive allele for the phenotype of the stellated morph. Besides the Mendelian inheritance of the presence/absence of a whitish cover of stellate hairs, the density of hairs appeared to be further modified by quantitative genes. The frequency of the recessive allele for the phenotype of the stellated morph varied among populations and showed a geographical structure. Possible mechanisms behind the spatial variation in indumentum are discussed.</p>},
  author       = {Widén, Björn},
  issn         = {0378-2697},
  keyword      = {Allele frequency,Helianthemum,Major gene,Mendelian inheritance,Pubescence},
  language     = {eng},
  month        = {09},
  pages        = {1--17},
  publisher    = {Springer},
  series       = {Plant Systematics and Evolution},
  title        = {Inheritance of a hair character in Helianthemum oelandicum var. canescens and allele frequencies in natural populations},
  url          = {http://dx.doi.org/10.1007/s00606-017-1457-0},
  year         = {2017},
}