Results 21 to 30 of about 8,699 (213)

Evolution of Caenorhabditis elegans host defense under selection by the bacterial parasite Serratia marcescens.

open access: yesPLoS ONE, 2017
Parasites can impose strong selection on hosts. In response, some host populations have adapted via the evolution of defenses that prevent or impede infection by parasites.
McKenna J Penley   +2 more
doaj   +1 more source

Yeast Sex: Surprisingly High Rates of Outcrossing between Asci

open access: yesPLoS ONE, 2010
Saccharomyces yeasts are an important model system in many areas of biological research. Very little is known about their ecology and evolution in the wild, but interest in this natural history is growing. Extensive work with lab strains in the last century uncovered the Saccharomyces life cycle.
Helen A Murphy, Clifford W Zeyl
openaire   +4 more sources

Molecular evidence of outcrossing rate variability in Brassica napus [PDF]

open access: yesEuphytica, 2011
A leafy crop of Brassica napus L. called nabicol has been grown by farmers in northwestern Spain for many years, being an important horticultural product during the winter season. A collection of landraces of a Brassica napus leafy crop called nabicol is kept at 'Misión Biológica de Galicia' (CSIC-Spain) which can be used to search for desirable ...
Soengas Fernández, María del Pilar   +4 more
openaire   +2 more sources

Mating system parameters in a high density population of andirobas in the Amazon forest

open access: yesPesquisa Agropecuária Brasileira, 2013
The objective of this work was to estimate the mating system parameters of a andiroba (Carapa guianensis) population using microsatellite markers and the mixed and correlated mating models.
Tatiana de Campos   +6 more
doaj   +1 more source

Plant Mating Systems Often Vary Widely Among Populations

open access: yesFrontiers in Ecology and Evolution, 2018
Most flowering plants are hermaphroditic, yet the proportion of seeds fertilized by self and outcross pollen varies widely among species, ranging from predominant self-fertilization to exclusive outcrossing.
Michael R. Whitehead   +4 more
doaj   +1 more source

Conspecific crop-weed introgression influences evolution of weedy rice (Oryza sativa f. spontanea) across a geographical range.

open access: yesPLoS ONE, 2011
BackgroundIntrogression plays an important role in evolution of plant species via its influences on genetic diversity and differentiation. Outcrossing determines the level of introgression but little is known about the relationships of outcrossing rates,
Han-Bing Xia   +4 more
doaj   +1 more source

Floral traits influencing outcrossing rate in rice

open access: yes, 1997
This article 'Floral traits influencing outcrossing rate in rice' appeared in the International Rice Research Notes series, created by the International Rice Research Institute (IRRI) to expedite communication among scientists concerned with the development of improved technology for rice and rice-based systems.
Ramalingam, J.   +3 more
openaire   +1 more source

Isolation and Characterization of Microsatellite Markers for the Cleistogamous Species Lamium amplexicaule (Lamiaceae)

open access: yesApplications in Plant Sciences, 2013
Premise of the study: Lamium amplexicaule is a cleistogamous plant that produces both closed flowers (obligately self-pollinated) and open flowers (potentially outcrossed).
Bojana Stojanova   +3 more
doaj   +1 more source

Does anthocyanin affect outcrossing rates in Datura Stramonium (Solanaceae)? [PDF]

open access: yesAmerican Journal of Botany, 2000
In this paper, I investigate whether the presence or absence of anthocyanin is neutral with respect to reproduction in Datura stramonium. The observations concern the portion of the life cycle spanning pollination to germination. Pollinators do not appear to distinguish between floral morphs, as revealed by nonbiased distribution of fluorescent powder ...
openaire   +2 more sources

Outcrossing rates in the gynomonoecious‐gynodioecious species Dianthus sylvestris (Caryophyllaceae) [PDF]

open access: yesAmerican Journal of Botany, 2003
Some species described as gynodioecious are truly gynomonoecious‐gynodioecious. Three distinct phenotypes may be found in their natural populations—female and hermaphrodite pure‐sexed plants bearing either only pistillate or perfect flowers, respectively, and mixed plants bearing both types of flowers.
Carine L, Collin, Jacqui A, Shykoff
openaire   +2 more sources

Home - About - Disclaimer - Privacy