Selfing and resource allocation in Schiedea salicaria (Caryophyllaceae), a gynodioecious species
نویسندگان
چکیده
منابع مشابه
Genetic variation of ecophysiological traits in two gynodioecious species of Schiedea (Caryophyllaceae).
Evolution of dimorphic breeding systems may involve changes in ecophysiological traits as well as floral morphology because of greater resource demands on females. Differences between related species suggest that ecophysiological traits should be heritable, and species with higher female frequencies should show greater sexual differentiation. We used modified partial diallel crossing designs to...
متن کاملSexual dimorphism and the genetic potential for evolution of sex allocation in the gynodioecious plant, Schiedea salicaria.
Sex allocation theory addresses how separate sexes can evolve from hermaphroditism but little is known about the genetic potential for shifts in sex allocation in flowering plants. We tested assumptions of this theory using the common currency of biomass and measurements of narrow-sense heritabilities and genetic correlations in Schiedea salicaria, a gynodioecious species under selection for gr...
متن کاملAsymmetrical Gene Flow in a Hybrid Zone of Hawaiian Schiedea (Caryophyllaceae) Species with Contrasting Mating Systems
Asymmetrical gene flow, which has frequently been documented in naturally occurring hybrid zones, can result from various genetic and demographic factors. Understanding these factors is important for determining the ecological conditions that permitted hybridization and the evolutionary potential inherent in hybrids. Here, we characterized morphological, nuclear, and chloroplast variation in a ...
متن کاملSexually dimorphic inflorescence traits in a wind-pollinated species: heritabilities and genetic correlations in Schiedea adamantis (Caryophyllaceae).
Sexual dimorphism may be especially pronounced in wind-pollinated species because they lack the constraints of biotically pollinated species that must present their pollen and stigmas in similar positions to ensure pollen transfer. Lacking these constraints, the sexes of wind-pollinated species may diverge in response to the different demands of pollen dispersal and receipt, depending on the ma...
متن کاملPhylogeographic patterns and demographic history of Schiedea globosa (Caryophyllaceae) on the Hawaiian Islands.
Geomorphological changes have been demonstrated to have had profound impacts on biodiversity, often leading to demographic expansions and contractions and allopatric divergence of taxa. We examined DNA sequence variation at two nuclear and one maternally inherited plastid locus among 10 populations of Schiedea globosa on the Hawaiian Islands to assess the primary factors shaping genetic structu...
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ژورنال
عنوان ژورنال: Journal of Evolutionary Biology
سال: 2004
ISSN: 1010-061X,1420-9101
DOI: 10.1111/j.1420-9101.2004.00835.x