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Polyploid speciation, in which the entire genome is duplicated, is particularly frequent in plants, perhaps because polyploid plants often exhibit ecological differentiation, local dispersal, high fecundity, perennial life history, and self-fertilization or asexual reproduction.
The genetics of inbreeding depression
Inbreeding depression — the reduced survival and fertility of offspring of related individuals — occurs in wild animal and plant populations as well as in humans, indicating that genetic variation in…
PERSPECTIVE: SPONTANEOUS DELETERIOUS MUTATION
A broad array of data are reviewed that collectively support the hypothesis that deleterious mutations arise in flies at rate of about one per individual per generation, with the average mutation decreasing fitness by about only 2% in the heterozygous state.
The strength and genetic basis of reproductive isolating barriers in flowering plants
- D. Lowry, J. Modliszewski, K. Wright, Carrie A. Wu, J. Willis
- BiologyPhilosophical Transactions of the Royal Society B…
- 27 September 2008
A comprehensive analysis involving 19 pairs of plant taxa and reviewed contemporary knowledge of the genetic architecture of reproductive isolation and the relative role of chromosomal and genic factors in intrinsic postzygotic isolation found that prezyGotic isolation is approximately twice as strong as postzealous isolation, and that postmating barriers are approximately three times more asymmetrical in their action than premating barriers.
A genetic map in the Mimulus guttatus species complex reveals transmission ratio distortion due to heterospecific interactions.
A genetic linkage map of an interspecific cross between M. guttatus and M. nasutus suggests that substantial genetic divergence has occurred between these Mimulus species and discusses possible causes of the unequal representation of parental genomes in the F(2) generation.
Ecological Reproductive Isolation of Coast and Inland Races of Mimulus guttatus
- D. Lowry, Cotton R. Rockwood, J. Willis
- Environmental Science, BiologyEvolution; international journal of organic…
- 1 September 2008
Analysis of the population structure and reproductive isolation between coastal perennial and inland annual forms of the yellow monkeyflower suggests that adaptations to widespread habitats can lead to the formation of reproductively isolated species.
The BTB protein MEL-26 is a substrate-specific adaptor of the CUL-3 ubiquitin-ligase
The BTB-containing protein MEL-26 is identified as a component required for degradation of MEI-1 in vivo and in vitro, and displays properties of a substrate-specific adaptor in Cul3-based E3-ubiquitin ligases.
The Statistics of Bulk Segregant Analysis Using Next Generation Sequencing
A statistical framework for QTL mapping using bulk segregant analysis (BSA) based on high throughput, short-read sequencing is described and it is found that relatively large bulks maximize the power to detect QTLs even though this implies weaker selection and less extreme allele frequency differences.
ECOLOGICAL DIVERGENCE ASSOCIATED WITH MATING SYSTEM CAUSES NEARLY COMPLETE REPRODUCTIVE ISOLATION BETWEEN SYMPATRIC MIMULUS SPECIES
This work estimated the magnitude of pre- and postzygotic barriers between naturally occurring sympatric populations of Mimulus guttatus and M. nasutus and found that F1 hybrid flowering phenology overlapped more with M. Guttatus than M.nasutus, suggesting greater potential for introgression from M. nasalutus than for the reverse direction.
A Widespread Chromosomal Inversion Polymorphism Contributes to a Major Life-History Transition, Local Adaptation, and Reproductive Isolation
A set of experiments demonstrates the involvement of a chromosomal inversion in the adaptive transition between annual and perennial ecotypes of the yellow monkeyflower, Mimulus guttatus