Geographic structure of genetic variation in the widespread woodland grass<i>Milium effusum</i>L. A comparison between two regions with contrasting history and geomorphology

Tyler, Torbjörn

doi:10.1139/g02-079

Cited by 9 publications

(18 citation statements)

References 36 publications

(33 reference statements)

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“…The analysis of the partition of allelic variation is less common, although it has been often applied in plant studies (e.g. Petit et al1998;Comps et al 2001;Tyler 2002;Persson et al 2004;Stefenon et al 2008). Allelic richness is a measure of genetic variation somehow different from gene diversity.…”

Section: Discussionmentioning

confidence: 99%

Management of genetic diversity of subdivided populations in conservation programmes

et al. 2009

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Population subdivision must be explicitly considered in the management of conservation programmes, as most populations of wild species at risk of extinction and those kept in captivity are spatially structured. The partition of gene and allelic diversity in within-and between-subpopulation components allows for the integral management of populations. We summarise the main aspects of this partition and some of its applications in terms of priorisation of populations for conservation and establishment of synthetic populations. The procedures for the maintenance of diversity in subdivided populations making use of molecular markers and its implementation by the software METAPOP are illustrated with empirical data.

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Section: Discussionmentioning

confidence: 99%

Management of genetic diversity of subdivided populations in conservation programmes

et al. 2009

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“…Thus, A ST considers the pairwise differences in absence/presence of alleles for each particular pair of subpopulations and, therefore, provides a specific assessment of the distances between subpopulations with respect to allelic composition. It has been argued that q ST largely depends on the distribution of rare alleles, notably whether they tend to be clustered in some subpopulations (high q ST ) or are distributed more evenly so that one subpopulation is representative of the whole population (low q ST ) (Comps et al 2001;Tyler 2002;Stefenon et al 2008). This is not very straightforward though.…”

Section: Discussionmentioning

confidence: 99%

“…The parameter q ST has been called A ST by several authors (e.g. Comps et al 2001;Tyler 2002;Persson et al 2004;Stefenon et al 2008). However, we will keep the original term to avoid further notation.…”

Section: Gene and Allelic Differentiation Between Subpopulationsmentioning

confidence: 99%

A new method for the partition of allelic diversity within and between subpopulations

Caballero

Rodríguez‐Ramilo

2010

Conserv Genet

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A method is proposed for the analysis of allelic diversity in the context of subdivided populations. The definition of an allelic distance between subpopulations allows for the partition of total allelic diversity into withinand between-subpopulation components, in a way analogous to the classical partition of gene diversity. A new definition of allelic differentiation, A ST , between subpopulations results from this partition, and is contrasted with the concept of allelic richness differentiation. The partition of allelic diversity makes it possible to establish the relative contribution of each subpopulation to within and between-subpopulation components of diversity with implications in priorisation for conservation. A comparison between this partition and that corresponding to allelic richness is illustrated with an example. Computer simulations are used to investigate the behaviour of the new statistic A ST in comparison with F ST for a finite island model under a range of mutation and migration rates. A ST has less dependence on migration rate than F ST for large values of migration rate, but the opposite occurs for low migration rates. In addition, the variance in the estimates of A ST is higher than that of F ST for low mutation rates, but the opposite for high mutation rates.

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“…Conert et al . (), Tyler () and Valdés & Scholz also mention M. effusum subsp. alpicola Chrtek ( M .…”

mentioning

confidence: 99%

“…In the UK, for instance, this cultivar is sold by 55 suppliers across the country (Royal Horticultural Society ) and also in the US it is recommended for shady, moist habitats (Gunnel, Goodspeed & Anderson ). Allozyme studies have suggested the species to be highly variable with less genetic diversity in northern populations, but without clear geographic distribution of the diversity (Tyler ).…”

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confidence: 99%

Biological Flora of the British Isles: Milium effusum

et al. 2017

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Summary1. This account presents information on all aspects of the biology of Milium effusum L. (Wood Millet) that are relevant to understanding its ecological characteristics and behaviour. The main topics are presented within the standard framework of the Biological Flora of the British Isles: distribution, habitat, communities, responses to biotic factors, responses to environment, structure and physiology, phenology, floral and seed characters, herbivores and disease, history, and conservation. 2. The grass Milium effusum is a common species of mature woodland in central and southern England, but is less common in the wetter parts of northern England, Wales, Scotland and Ireland. Worldwide, the species is native to many temperate, boreal, subarctic and subalpine parts of the northern hemisphere: from eastern North America across most of Europe (excluding Mediterranean climates) to the Ural Mountains and Black Sea, extending eastwards to the Himalaya, Korea and Japan. 3. Wood Millet is a shade-tolerant, relatively tall grass (up to 1Á8 m) producing up to 700 caryopses per individual. It is characteristic of temperate deciduous woodland, but can also occur in other woodland and forest types and even in scrub, alpine meadows, along railways and roads, and on rocks. In woods, it is one of the most conspicuous plants of the herb layer in the early summer after the disappearance of spring flowering species. While the species is generally considered an ancient woodland indicator in England and western Europe, it is also known to colonize secondary, postagricultural forests relatively rapidly in other areas such as Denmark, southern Sweden and Poland. 4. The species has a wide amplitude in terms of soil acidity and nutrient availability, but predominantly grows on soils of intermediate soil fertility and soil pH and with high organic matter concentration. However, M. effusum can tolerate large quantities of tree-leaf litter on the forest floor and is able to grow on very acidic soils. 5. Changes in land use, climate, densities of large herbivores and atmospheric deposition of nitrogen are having effects on populations of Wood Millet. Significant responses of the life-history traits and population characteristics have been detected in response to environmental variation and to experimental treatments of temperature, nutrients, light and acidity. In many of its habitats across its range, *Nomenclature of vascular plants follows Stace (2010) and, for non-British species, Flora Europaea.

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Geographic structure of genetic variation in the widespread woodland grassMilium effusumL. A comparison between two regions with contrasting history and geomorphology

Cited by 9 publications

References 36 publications

Management of genetic diversity of subdivided populations in conservation programmes

Management of genetic diversity of subdivided populations in conservation programmes

A new method for the partition of allelic diversity within and between subpopulations

Biological Flora of the British Isles: Milium effusum

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