Results 261 to 270 of about 25,530 (292)

Variation in the strength of association among pollination systems and floral traits: Evolutionary changes in the floral traits of Bornean gingers (Zingiberaceae)

American Journal of Botany, 2013
• Premise of the study: Diversification of floral traits in angiosperms is often attributed to have been driven by adaptations to pollinators. Nevertheless, phylogenetic studies on the relationships among evolutionary changes in floral traits and pollination systems are still limited.
Shoko, Sakai, Atsushi, Kawakita, Kazuyuki, Ooi, Tamiji, Inoue   +3 more
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Floral zygomorphy, the recurring evolution of a successful trait

BioEssays, 2004
AbstractThe flowers of the primitive angiosperm plants were radially symmetrical (actinomorphic). Flowers with bilateral symmetry (zygomorphic) evolved in several clades independently as an adaptation to specialized methods of pollination and played an important role in the diversification of flowering plants.
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Floral traits and pollination ecology of European Arum hybrids

Oecologia, 2015
Hybridisation is common in plants and can affect the genetic diversity and ecology of sympatric parental populations. Hybrids may resemble the parental species in their ecology, leading to competition and/or gene introgression; alternatively, they may diverge from the parental phenotypes, possibly leading to the colonisation of new ecological niches ...
Chartier, Marion, Liagre, Suzanne, Weiss-Schneeweiss, Hanna, Kolano, Bozena, Bessière, Jean-Marie, Schönenberger, Jurg, Gibernau, Marc   +6 more
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QTL dissection of floral traits in Streptocarpus (Gesneriaceae)

Euphytica, 2020
Flower shape and colour are key plant traits which are often strongly correlated with pollinator choice and reproductive isolation. To understand the genetic changes underlying variation in these traits, we performed the first QTL analyses of these traits in Streptocarpus (Gesneriaceae) using a segregating backcross (BC) population of (S.
Yun-Yu Chen, Kanae Nishii, Catherine Kidner, Christine Anne Hackett, Michael Möller   +4 more
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Floral trait variation in fourCyclamen (Primulaceae) species

Plant Systematics and Evolution, 1998
The purpose of this study is to examine floral trait variation between fourCyclamen species that show variation in their ability to reproduce in the absence of pollinators and in levels of inbreeding. Pollen and ovule production, pollen/ovule ratio, pollen volume, petal length and width, diameter of the corolla mouth, pistil and stamen length, and ...
L. Affre, J. D. Thompson
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Polymorphic Floral Traits in Linaria canadensis (Scrophulariaceae)

American Midland Naturalist, 1997
-This study examined several aspects of a previously unreported flower color polymorphism in the annual plant Linaria canadensis. Natural populations in southeastern Georgia contained mainly two petal color morphs: the 'dark' purple morph and the 'light' blue morph (two individuals of a completely 'white' albino morph were also found). The frequency of
Lorne M. Wolfe, Susan E. Sellers
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Genetics of floral traits of Jaltomata procumbens (Solanaceae)

Brittonia, 2016
Understanding the genetic control of key reproductive traits/characters facilitates better understanding of systematics and evolution. Accordingly, we employed hybridization studies to investigate the Mendelian genetics of eight floral traits of two divergent populations of Jaltomata procumbens, which appear to have undergone an evolutionary shift in ...
Thomas Mione, Gregory J. Anderson
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Genetic mechanisms of floral trait correlations in a natural population

Nature, 2002
Genetic correlations among traits are important in evolution, as they can constrain evolutionary change or reflect past selection for combinations of traits. Constraints and integration depend on whether the correlations are caused by pleiotropy or linkage disequilibrium, but these genetic mechanisms underlying correlations remain largely unknown in ...
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Resource‐ and pollinator‐mediated selection on floral traits

Functional Ecology, 2016
Summary Female reproductive success is predicted to be simultaneously limited by the availability of pollen and resources. Selection on floral traits results from both factors, but their relative importance and interaction is poorly understood.
Nina Sletvold, Matthew Tye, Jon Ågren
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Non-pollinator agents of selection on floral traits

2006
Abstract Despite the dominating role of pollinators in floral evolution, mounting evidence reveals significant additional, often antagonistic, influences of abiotic and biotic non-pollinator agents. Even when pollinators and other agents impose selection on floral traits in the same direction, the role of other agents is frequently ...
Sharon Y Strauss, Justen B Whittall
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