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PATHWAYS, MECHANISMS, AND RATES OF POLYPLOID FORMATION IN FLOWERING PLANTS
The results indicate that the triploid bridge pathway can contribute significantly to autopolyploids formation regardless of the mating system, and to allopolyploid formation in outcrossing taxa.
THE EVOLUTION OF SELF‐FERTILIZATION AND INBREEDING DEPRESSION IN PLANTS. I. GENETIC MODELS
Genetic models are constructed which allow inbreeding depression to change with the mean selfing rate in a population by incorporating both mutation to recessive and partially dominant lethal and sublethal alleles at many loci and mutation in quantitative characters under stabilizing selection.
EVOLUTION OF THE MAGNITUDE AND TIMING OF INBREEDING DEPRESSION IN PLANTS
- B. Husband, D. Schemske
- Biology, PsychologyEvolution; international journal of organic…
- 1 February 1996
The hypothesis that most early acting inbreeding depression is due to recessive lethals and can be purged through inbreeding, whereas much of the late‐acting inbreeding depressions are due to weakly deleterious mutations and is very difficult to purge, even under extreme inbreeding is supported.
Evolution and the latitudinal diversity gradient: speciation, extinction and biogeography.
Two major hypotheses for the origin of the latitudinal diversity gradient are reviewed, including the time and area hypothesis and the diversification rate hypothesis, which hold that tropical regions diversify faster due to higher rates of speciation, or due to lower extinction rates.
NEOPOLYPLOIDY IN FLOWERING PLANTS
The fertility of early generation polyploids increases rapidly, owing largely to selection against meiotic configurations that generate unbala..., casting doubt on the paradigm that allopolyploids should be more frequent due to their inherent fertility.
Is There a Latitudinal Gradient in the Importance of Biotic Interactions
The hypothesis that biotic interactions are more important in the tropics is supported, but additional research is needed on latitudinal comparisons of rates of molecular evolution for genes involved inBiotic interactions, estimates of gradients in interaction strength, and phylogenetic comparisons of the traits that med...
COMPONENTS OF REPRODUCTIVE ISOLATION BETWEEN THE MONKEYFLOWERS MIMULUS LEWISII AND M. CARDINALIS (PHRYMACEAE)
The results suggest that ecological factors resulting from adaptive divergence are the primary isolating barriers in this system of Mimulus lewisii and M. cardinalis, sister species of monkeyflowers.
THE EVOLUTION OF SELF‐FERTILIZATION AND INBREEDING DEPRESSION IN PLANTS. II. EMPIRICAL OBSERVATIONS
A bimodal distribution of outcrossing rates was observed for natural plant populations, with more primarily selfing and primarily outcrossing species, and fewer species with intermediate outcrossing…
THE BIOLOGY OF SPECIATION
- James M Sobel, Grace F. Chen, Lorna R. Watt, D. Schemske
- BiologyEvolution; international journal of organic…
- 1 February 2010
It is argued that natural selection is a ubiquitous part of speciation, and given the many ways in which stochastic and deterministic factors may interact during divergence, it is questioned whether the ecological speciation concept is useful.
Evaluating approaches to the conservation of rare and endangered plants
- D. Schemske, B. Husband, M. Ruckelshaus, C. Goodwillie, I. Parker, J. Bishop
- Environmental Science
- 1 April 1994
Evaluating approaches to the conservation of rare and endangered plants and their impacts on threatened and endangered species in the wild is a good place to start.