Results 71 to 80 of about 21,292 (252)

Mating system parameters in a high density population of andirobas in the Amazon forest. [PDF]

open access: yes, 2017
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.
CAMPOS, T. de   +6 more
core  

Pollination biology and outcrossing rates in hermaphroditic schiedea lydgatei (Caryophyllaceae) [PDF]

open access: yesAmerican Journal of Botany, 1997
The influence of outcrossing and pollination biology on the maintenance of hermaphroditism was studied for Schiedea lydgatei (Caryophyllaceae: Alsinoideae), a species endemic to Moloka‘i in the Hawaiian Islands. Schiedea lydgatei is the only hermaphroditic species in an otherwise dimorphic clade and hermaphroditism is likely the result of a reversal ...
J, Norman, S, Weller, A, Sakai
openaire   +2 more sources

Multiple cis‐regulatory elements collaborate to control mdka expression in telencephalic neural stem cells of adult zebrafish during constitutive and regenerative neurogenesis

open access: yesThe FEBS Journal, EarlyView.
midkine‐a (mdka), a pan‐injury response gene in vertebrates, is precisely regulated in the zebrafish telencephalon by a modular cis‐regulatory architecture. This control ensures proper expression during development, adult brain homeostasis, and regeneration.
Jincan Chen   +6 more
wiley   +1 more source

Time-Dependent Reliability Analysis of Mechanical Structures using an Analytical Approach [PDF]

open access: yesInternational Journal of Advanced Design and Manufacturing Technology, 2017
Time-dependent reliability analysis of mechanical structures is concerned by the use of an outcrossing approach. In this approach the so-called outcrossing rate plays a critical role and thus it is important to estimate it as straight ward as possible ...
Mohammad Reza Moarefzadeh
doaj  

Relationship between empty seed and genetic factors in European beech (Fagus sylvatica L.)

open access: yesSilva Fennica, 2003
The relationship between percentage of empty seed (Pes) and genetic factors was explored in an isolated stand of European beech (Fagus sylvatica L.). Nine allozyme loci (GOT-B, IDH-A, LAP-A, MDH-B, MDH-C, MNR-A, 6-PGDH-A, PGI-B and PGM-A) were used to
Wang, K.
doaj   +1 more source

Nocturnal Lepidopterans as Essential Pollinators of Aspidosperma pyrifolium (Apocynaceae), a Keystone Tree in the Caatinga Dry Forest

open access: yesJournal of Applied Entomology, EarlyView.
ABSTRACT Pollination is a key ecosystem service, yet most studies focus on diurnal interactions, often overlooking nocturnal pollinators such as hawkmoths and settling moths. In arid environments, nocturnal pollination plays a crucial role in maintaining native plant species of high biocultural value, as seen in the Caatinga dry forest.
Joel A. Queiroz   +3 more
wiley   +1 more source

Pollen Performance in Clarkia Taxa with Contrasting Mating Systems: Implications for Male Gametophytic Evolution in Selfers and Outcrossers

open access: yesPlants, 2013
We tested three predictions regarding the joint evolution of pollen performance and mating system. First, due to the potential for intense intrasexual competition in outcrossing populations, we predicted that outcrossers would produce faster-growing ...
Alisa A. Hove, Susan J. Mazer
doaj   +1 more source

Hybridity of mainly asexually propagating duckweeds in genus Lemna – dead end or breakthrough?

open access: yesNew Phytologist, EarlyView.
Summary The cosmopolitan, mainly vegetatively propagating, organ‐reduced monocotyledonous aquatic duckweeds are the smallest and fastest growing angiosperms, distributed world‐wide and flower rarely in nature. Recently, we reported intra‐ and interspecific hybrids and ploidy variants in the genus Lemna.
Yuri Lee   +10 more
wiley   +1 more source

Sistema de reprodução em populações de Eschweilera ovata (Cambess.) Miers Mating system in Eschweilera ovata (Cambess.) Miers populations

open access: yesRevista Árvore, 2006
O sistema de reprodução de duas populações de Eschweilera ovata foi quantificado por análise de isoenzimas em estrutura de progênies usando os modelos misto de reprodução e cruzamentos correlacionados.
Eduardo Gusson   +2 more
doaj   +1 more source

Substitution Mapping of the Major Quantitative Trait Loci Controlling Stigma Exsertion Rate from Oryza glumaepatula

open access: yesRice, 2020
Background Stigma exsertion rate (SER) is a key determinant for the outcrossing ability of male sterility lines (MSLs) in hybrid rice seed production. In the process of domestication, the outcrossing ability of cultivated rice varieties decreased, while ...
Quanya Tan   +13 more
doaj   +1 more source

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