نتایج جستجو برای: reproductive trait

تعداد نتایج: 170548  

Journal: :Remote Sensing 2021

The ability to measure and monitor wildlife populations is important for species management conservation. use of near-infrared spectroscopy (NIRS) rapidly detect physiological traits from scat other body materials could play an role in the conservation species. Previous research has demonstrated potential NIRS diseases such as novel COVID-19 saliva, parasites feces, numerous animal skin, hair, ...

Journal: : 2022

The study was conducted at the ruminant research station of general commission for agricultural research/Ministry Agriculture, as well laboratory genetic resources department livestock/Ministry Agriculture and college agriculture engineering science, with aim determine genotypic expression region (intron 2 part exon 3) LHX3 gene And its relationship to fertility rate in local Shami goats. For t...

2015
Francisco Güell Pelayo

Drawing from Julian Savulescu’s argument for the obligation to use technological interventions for the enhancement human life, the Principle of Procreative Beneficence (PPB) states that parents have a moral obligation to use available reproductive technologies, including techniques of genetic manipulation, to create children who have the best chance of enjoying the best possible life. The aim o...

Journal: :Genetics 2005
Zhao Lai Takuya Nakazato Marzia Salmaso John M Burke Shunxue Tang Steven J Knapp Loren H Rieseberg

New species may arise via hybridization and without a change in ploidy. This process, termed homoploid hybrid speciation, is theoretically difficult because it requires the development of reproductive barriers in sympatry or parapatry. Theory suggests that isolation may arise through rapid karyotypic evolution and/or ecological divergence of hybrid neospecies. Here, we investigate the role of k...

ژورنال: علوم آب و خاک 2000
خواجه ‌پور, محمدرضا , سیدی, فرامرز ,

Obtaining high seed and oil yields of sunflower requires coincidence of vegetative and reproductive stages of growth of the plant with suitable environmental conditions via selecting appropriate planting date. Since the suitable date of planting for sunflower cultivars under Isfahan environmental conditions was not determined, this experiment was conducted in 1996 at the Agricultural Research S...

2018
Jordana Neri Tânia Wendt Clarisse Palma-Silva

Reproductive isolation is of fundamental importance for maintaining species boundaries in sympatry. Here, we examine the genetic and morphological differences between two closely related bromeliad species: Vriesea simplex and Vriesea scalaris. Furthermore, we examined the occurrence of natural hybridization and discuss the action of reproductive isolation barriers. Nuclear genomic admixture sug...

Journal: :Nature reviews. Genetics 2002
Timothy R Birkhead Tommaso Pizzari

The female reproductive tract is where competition between the sperm of different males takes place, aided and abetted by the female herself. Intense postcopulatory sexual selection fosters inter-sexual conflict and drives rapid evolutionary change to generate a startling diversity of morphological, behavioural and physiological adaptations. We identify three main issues that should be resolved...

Journal: :PLoS Biology 2008
Benjamin P Oldroyd Madeleine Beekman

The "reproductive ground plan" hypothesis (RGPH) proposes that reproductive division of labour in social insects had its antecedents in the ancient gene regulatory networks that evolved to regulate the foraging and reproductive phases of their solitary ancestors. Thus, queens express traits that are characteristic of the reproductive phase of solitary insects, whereas workers express traits cha...

2011
Richard M. Merrill Bas Van Schooten Janet A. Scott Chris D. Jiggins

Ecological speciation proceeds through the accumulation of divergent traits that contribute to reproductive isolation, but in the face of gene flow traits that characterize incipient species may become disassociated through recombination. Heliconius butterflies are well known for bright mimetic warning patterns that are also used in mate recognition and cause both pre- and post-mating isolation...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2013
Andrew J Young Nigel C Bennett

In cooperatively breeding mammals and birds, intra-sexual reproductive competition among females may often render variance in reproductive success higher among females than males, leading to the prediction that intra-sexual selection in such species may have yielded the differential exaggeration of competitive traits among females. However, evidence to date suggests that female-biased reproduct...

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