Results 61 to 70 of about 41,163 (289)
PLoS 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
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Rate of Adaptation in Large Sexual Populations
, 2010 Adaptation often involves the acquisition of a large number of genomic changes which arise as mutations in single individuals. In asexual populations, combinations of mutations can fix only when they arise in the same lineage, but for populations in ...
Fisher, Daniel S. +2 more
core +2 more sources
Exploring the relationship between tychoparthenogenesis and inbreeding depression in the Desert Locust, Schistocerca gregaria [PDF]
, 2017 Tychoparthenogenesis, a form of asexual reproduction in which a small proportion of unfertilized eggs can hatch spontaneously, could be an intermediate evolutionary link in the transition from sexual to parthenogenetic reproduction.
Blondin, Laurence +4 more
core +1 more source
INBREEDING DEPRESSION UNDER JOINT SELFING, OUTCROSSING, AND ASEXUALITY [PDF]
Evolution, 1997 Partial asexual reproduction was introduced into a model of inbreeding depression due to nearly recessive lethal mutations in a partially selfing population. The frequencies of asexuality, selfing, and outcrossing were either constant or occurred in cycles of a single sexual generation followed by one or more asexual generations.
Christina A, Muirhead, Russell, Lande
openaire +2 more sources
Fhod3 in zebrafish supports myofibril stability during growth of embryonic skeletal muscle
Developmental Dynamics, EarlyView.Abstract Background Actin filament organization in cardiomyocytes critically depends on the formin Fhod3, but a role for Fhod3 in skeletal muscle development has not yet been described. Results We demonstrate here that in zebrafish mutated for one of two fhod3 paralog genes, fhod3a, skeletal muscle of the trunk appears normal through 2 days post ...
Aubrie Russell +3 more
wiley +1 more source
Floral biology and reproductive mechanisms of the Ocimum canum Sims (Lamiaceae) [PDF]
Biotemas, 2008 The Ocimum genus (Lamiaceae) presents essential oils used in the pharmaceutical, perfume, cosmetics and culinary industries. The aim of this paper was to study the fl oral biology and breeding mechanisms of Ocimum canum Sims.
Cláudio Lúcio Fernandes Amaral +5 more
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Rice Science, 2015 An investigation was carried out with three newly developed temperature sensitive genic male sterile (TGMS) lines for their floral traits, seed production potential and outcrossing ability in ten cross combinations. In the TGMS lines, fertile pollens had
S.J. Arasakesary +3 more
doaj +1 more source
GENETIC VARIATION FOR OUTCROSSING AMONG CAENORHABDITIS ELEGANS ISOLATES [PDF]
Evolution, 2006 The evolution of breeding systems results from the existence of genetic variation and selective forces favoring different outcrossing rates. In this study we determine the extent of genetic variation for characters directly related to outcrossing, such as male frequency, male mating ability, and male reproductive success, in several wild isolates of ...
Teotónio, H, Manoel, D, Phillips, PC
openaire +4 more sources
Nordic Journal of Botany, EarlyView.Pollen limitation, a decrease in seed production due to insufficient pollen receipt, may influence plant demography and the evolution of sexual systems. Its empirical estimation of pollen supplementation of some of the flowers on an individual is well known to be prone to overestimation due to potential resource reallocation among the individual's ...
Xia Jiang +6 more
wiley +1 more source
Etude par les isozymes de la pollinisation libre de génotypes d'hévéas sauvages (Hevea brasiliensis Muell. Arg.) en verger à graines [PDF]
Biotechnologie, Agronomie, Société et Environnement, 2006 Survey of the open pollination by isozymes in a wild rubber trees (Hevea brasiliensis Muell. Arg.) seeds orchard. The Côte dʼIvoire has a wild rubber tree population for which an improvement in a seeds orchard is suggested by open pollination.
Clément-Demange A. +4 more
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