Inheritance of glabrous plants in Helianthemum oelandicum var. oelandicum and spatial patterns of allele frequencies in local populations

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Abstract

Helianthemum oelandicum var. oelandicum is an endemic taxon on the Baltic island of Öland, SE Sweden. Plants can be classified into two morphs: the bristled morph (with bristles and with or without scattered stellate hairs) and the glabrous morph (without bristles and stellate hairs). In crosses between plants assumed to be homozygous for the trait that characterises the phenotypes of the two morphs, offspring in F1 could not be distinguished from the bristled morph. Segregation in F2 did not deviate from the expected 3:1 ratio (bristled morphs/glabrous morphs), indicating one major gene with a dominant allele for the phenotype of the bristled morph and a recessive allele for the phenotype of the glabrous morph. Besides the Mendelian inheritance of presence/absence of hairs, the density of hairs appeared to be further modified by quantitative genes. The frequency of the recessive allele for the phenotype of the glabrous morph varied among local populations and showed a geographical structure, both on local and regional scales. Possible mechanisms behind the spatial variation in indumentum are discussed.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Botany

Keywords

  • Allele frequency, Helianthemum, Major gene, Mendelian inheritance, Natural population, Periodical inundation, Pubescence, Topography
Original languageEnglish
Pages (from-to)1199-1219
JournalPlant Systematics and Evolution
Volume304
Issue number10
Early online date2018 Sep 7
Publication statusPublished - 2018
Publication categoryResearch
Peer-reviewedYes