Associations between Allele Frequencies in Festuca Ovina and Habitat Variation in the Alvar Grasslands on the Baltic Island of Oland

Prentice, Honor C.; Lönn, Mikael; Lefkovitch, L. P.; Runyeon, Helena

doi:10.2307/2261593

Cited by 89 publications

(129 citation statements)

References 54 publications

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“…The presence of the PgiC2(f ) locus was not retained in the final models for electromorphs 1 or 2. As in earlier studies [32,40], both these electromorphs show significant associations with abiotic (pH and/or moisture) and biotic variables (the percentage covers of bare ground and different categories of vegetation cover, respectively) characterizing the grassland plant communities in the sampled microhabitats (cf. figure 1 and electronic supplementary material, table S4).…”

Section: Resultssupporting

confidence: 72%

A horizontally transferred nuclear gene is associated with microhabitat variation in a natural plant population

Prentice

Lönn

et al. 2015

Proc. R. Soc. B.

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Horizontal gene transfer involves the non-sexual interspecific transmission of genetic material. Even if they are initially functional, horizontally transferred genes are expected to deteriorate into non-expressed pseudogenes, unless they become adaptively relevant in the recipient organism. However, little is known about the distributions of natural transgenes within wild species or the adaptive significance of natural transgenes within wild populations. Here, we examine the distribution of a natural plant-to-plant nuclear transgene in relation to environmental variation within a wild population. Festuca ovina is polymorphic for an extra (second) expressed copy of the nuclear gene ( PgiC ) encoding cytosolic phosphoglucose isomerase, with the extra PgiC locus having been acquired horizontally from the distantly related grass genus Poa. We investigated variation at PgiC in samples of F. ovina from a fine-scale, repeating patchwork of grassland microhabitats, replicated within spatially separated sites. Even after accounting for spatial effects, the distributions of F. ovina individuals carrying the additional PgiC locus, and one of the enzyme products encoded by the locus, are significantly associated with fine-scale habitat variation. Our results suggest that the PgiC transgene contributes, together with the unlinked ‘native’ PgiC locus, to local adaptation to a fine-scale mosaic of edaphic and biotic grassland microhabitats.

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Section: Resultssupporting

confidence: 72%

A horizontally transferred nuclear gene is associated with microhabitat variation in a natural plant population

Prentice

Lönn

et al. 2015

Proc. R. Soc. B.

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“…The distribution area contains arid districts, semi-arid, semi-humid and humid regions. High levels of genetic diversity in natural populations are associated with a wide range of ecological types and niche variation (Prentice et al, 1995). Habitat fragmentation and deterioration resulting from Quaternary glaciations, following an arid trend and human activities of northern China, are most likely factors leading to high genetic diversity and high population differentiation in this species (Tables 3 and 4).…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity and genetic structure of the Daurian Partridge (Perdix dauuricae) in China, assessed by microsatellite variation

Cao¹,

Liu²,

Wang³

et al. 2010

Chinese Birds

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The Daurian Partridge (Perdix dauuricae) is a kind of hunting bird with high economic value. Genetic diversity and structure in the Daurian Partridge were studied by analyzing eight microsatellite loci in 23 populations found throughout the range of the species in China. The objectives were to evaluate the consequences on genetic diversity and differentiation of Daurian Partridge populations and to obtain a profound genetic insight for future management decisions and for effective measures to protect and exploit Daurian Partridges. The results showed that microsatellites were polymorphic in all Daurian Partridge populations, with a high level of genetic diversity over all the loci, especially in the Qaidam Basin populations which have the highest level of diversity. Significant genetic divergence was observed among different groups as well as between populations within the same group; most pairwise F ST values were highly significant. Both phylogenetic trees and Bayesian clustering analyses revealed clear differentiation among the 23 populations of the Daurian Partridge, which were classified into two genetically differentiated groups. A bottleneck analysis indicated that Daurian Partridge populations have experienced a recent bottleneck. Our study argues that the Qaidam populations, North China populations, JN population, ZJC population, and Liupan Mountain populations should be paid special attention in order to retain adequate population sizes for maintaining genetic diversity.

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“…A manutenção ou aumento de divergências morfológicas entre ecótipos pode ser favorecida pela assincronia no processo de floração entre as áreas (Prentice 1984, Prentice et al 1995, o que dificultaria o cruzamento entre indivíduos de cerrado e de vereda em condições naturais.…”

Section: Discussionunclassified

“…polytricha entre indivíduos relativamente próximos traz importantes implicações na determinação de áreas de preservação, conservação e manejo da flora silvestre (Black et al 1995). Perda de parte da variabilidade genética de uma população pode ocorrer, caso áreas delimitadas sejam inferiores ao mínimo necessário para a manutenção de ecó-tipos, aparentemente não detectáveis fenotipicamente (Prentice et al 1995). Se divergências entre ecótipos forem gradativamente acentuadas e mantidas por seleção disruptiva, uma nova variedade ou subspécie de Cabralea canjerana poderá surgir em áreas de vereda, desde que a heterogeneidade ambiental desta área de transição seja mantida e que custos para a plasticidade aumentem com o grau de especialização (Lortie & Aarssen 1996).…”

Section: Discussionunclassified

Potencial plástico de Cabralea canjerana subsp. polytricha (Adr. Juss.) Penn. (Meliaceae) e seu papel na formação de ecótipos em áreas de cerrado e vereda, Uberlândia, MG

Fuzeto¹,

Lomônaco²

2000

Rev. bras. Bot.

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Potencial plástico deABSTRACT -(Plastic potential of Cabralea canjerana subsp. polytricha (Adr. Juss.) Penn. (Meliaceae) and its role on the ecotype formation in savanna and palm swamp areas, Uberlândia, MG). The ecotype formation of Cabralea canjerana subsp. polytricha in areas of savanna and palm swamp in an ecological reserve in Uberlândia, MG, was studied, using a quantitative genetic model to measure phenotypic plasticity. Ecotypes were characterised by the height of the individuals, weight of fruits and seeds, number of viable seeds per fruit and synchronization of the flowering period. There is great genetic variability in important fitness characters of the subspecies. The genotypes respond phenotypically to the environmental heterogeneity produced by the savanna/palm swamp gradient in two of the three measured characters. The plastic responses were distinct among genotypes in both direction and intensity. Asynchrony of the flowering period and the action of seed dispersers may contribute to increase the divergences of the ecotypes in the study area.RESUMO -(Potencial plástico de Cabralea canjerana subsp. polytricha (Adr. Juss.) Penn. (Meliaceae) e seu papel na formação de ecótipos em áreas de cerrado e vereda, Uberlândia, MG). A formação de ecótipos em Cabralea canjerana subsp. polytricha foi estudada em áreas de cerrado e vereda de uma reserva ecológica no município de Uberlândia, MG, utilizando modelos de genética quantitativa para medida de plasticidade fenotípica. Os ecótipos foram caracterizados quanto à altura dos indivíduos, peso de frutos e sementes, número de sementes viáveis por fruto e sincronização no período de floração. Existe grande variabilidade genética para caracteres importantes na determinação do valor adaptativo da subspécie. Os genótipos respondem fenotipicamente à heterogeneidade ambiental, provocada pelo gradiente cerrado/vereda, em dois dos três caracteres observados. As respostas plásticas foram distintas entre os genótipos, quanto à direção e intensidade. Assincronia temporal de floração e o modo de ação de dispersores de sementes podem contribuir para a evolução da divergência entre ecótipos na área estudada.

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Associations between Allele Frequencies in Festuca Ovina and Habitat Variation in the Alvar Grasslands on the Baltic Island of Oland

Cited by 89 publications

References 54 publications

A horizontally transferred nuclear gene is associated with microhabitat variation in a natural plant population

A horizontally transferred nuclear gene is associated with microhabitat variation in a natural plant population

Genetic diversity and genetic structure of the Daurian Partridge (Perdix dauuricae) in China, assessed by microsatellite variation

Potencial plástico de Cabralea canjerana subsp. polytricha (Adr. Juss.) Penn. (Meliaceae) e seu papel na formação de ecótipos em áreas de cerrado e vereda, Uberlândia, MG

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