Beyond mean allelic effects: A locus at the major color gene MC1R associates also with differing levels of phenotypic and genetic (co)variance for coloration in barn owls

Evolution ◽  
2017 ◽  
Vol 71 (10) ◽  
pp. 2469-2483 ◽  
Author(s):  
Luis M. San-Jose ◽  
Valérie Ducret ◽  
Anne-Lyse Ducrest ◽  
Céline Simon ◽  
Alexandre Roulin
Keyword(s):  
Barn Owls ◽  
Color Gene

Influence of Social Behaviour on Prey-catching in Barn Owls

Bird Behavior ◽  
1990 ◽  
Vol 9 (1) ◽  
pp. 7-13 ◽  
Author(s):  
Rottraut Ille
Keyword(s):  
Social Behaviour ◽  
Barn Owls

scholarly journals Contamination by neonicotinoid insecticides in barn owls (Tyto alba) and Alpine swifts (Tachymarptis melba)

2021 ◽  
Vol 785 ◽  
pp. 147403
Author(s):  
Ségolène Humann-Guilleminot ◽  
Shirley Laurent ◽  
Pierre Bize ◽  
Alexandre Roulin ◽  
Gaétan Glauser ◽  
...  
Keyword(s):  
Tyto Alba ◽  
Neonicotinoid Insecticides ◽  
Barn Owls

scholarly journals Nidicolous beetle species richness is driven by Barn Owl’s nests occupancy and landscape structure

2021 ◽  
Author(s):  
Vivien Cosandey ◽  
Robin Séchaud ◽  
Paul Béziers ◽  
Yannick Chittaro ◽  
Andreas Sanchez ◽  
...  
Keyword(s):  
Species Richness ◽  
Landscape Structure ◽  
Barn Owl ◽  
Arthropod Community ◽  
Tyto Alba ◽  
Nest Material ◽  
Crop Fields ◽  
Nest Boxes ◽  
Bird Droppings ◽  
Barn Owls

AbstractBird nests are specialized habitats because of their particular composition including nest detritus and bird droppings. In consequence, they attract a specialized arthropod community considered as nidicolous, which includes species only found in bird nests (strictly nidicolous) or sometimes found in bird nests (facultatively nidicolous). Because the factors influencing the entomofauna in bird nests are poorly understood, in autumn 2019, we collected nest material in 86 Barn Owl (Tyto alba) nest boxes. We investigated whether the invertebrate species richness was related to Barn Owl nest box occupancy, the density of available nest boxes and the landscape structure. We found 3,321 nidicolous beetle specimens belonging to 24 species. Species richness of strictly nidicolous beetles was 2.7 times higher in nest boxes occupied by a family of Barn Owls the previous spring compared to unoccupied nest boxes. It was also higher in sites that were more often occupied by Barn Owls in the five previous years and in areas surrounded by a higher proportion of crop fields. For facultatively nidicolous beetles, the density of Barn Owl nest boxes enhanced the species richness. In conclusion, our study suggests that the strictly nidicolous beetles benefit from occupied nest boxes of Barn Owls, whereas facultatively nidicolous beetles look for nest boxes independently of whether Barn Owls occupy them. Our study highlights the importance of bird nests for a suite of invertebrates.

scholarly journals A Novel Pinkish-White Flower Color Variant Is Caused by a New Allele of Flower Color Gene W1 in Wild Soybean (Glycine soja)

Agronomy ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1001
Author(s):  
Jagadeesh Sundaramoorthy ◽  
Gyu Tae Park ◽  
Hyun Jo ◽  
Jeong-Dong Lee ◽  
Hak Soo Seo ◽  
...  
Keyword(s):  
Amino Acid ◽  
Amino Acid Substitution ◽  
Functional Activity ◽  
Glycine Soja ◽  
Wild Soybean ◽  
Flower Color ◽  
Loss Of Function ◽  
Protein Variation ◽  
Color Variant ◽  
Color Gene

The enzyme flavonoid 3′,5′-hydroxylase (F3′5′H) plays an important role in producing anthocyanin pigments in soybean. Loss of function of the W1 locus encoding F3′5′H always produces white flowers. However, few color variations have been reported in wild soybean. In the present study, we isolated a new color variant of wild soybean accession (IT261811) with pinkish-white flowers. We found that the flower’s pinkish-white color is caused by w1-s3, a single recessive allele of W1. The SNP detected in the mutant caused amino acid substitution (A304S) in a highly conserved SRS4 domain of F3′5′H proteins. On the basis of the results of the protein variation effect analyzer (PROVEAN) tool, we suggest that this mutation may lead to hypofunctional F3′5′H activity rather than non-functional activity, which thereby results in its pinkish-white color.

scholarly journals Night vision in barn owls: Visual acuity and contrast sensitivity under dark adaptation

2012 ◽  
Vol 12 (13) ◽  
pp. 4-4 ◽  
Author(s):  
J. Orlowski ◽  
W. Harmening ◽  
H. Wagner
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Dark Adaptation ◽  
Night Vision ◽  
Barn Owls

scholarly journals Extensive, Nonrandom Diversity of Excision Footprints Generated by Ds-Like Transposon Ascot-1Suggests New Parallels with V(D)J Recombination

1998 ◽  
Vol 18 (7) ◽  
pp. 4337-4346 ◽  
Author(s):  
Vincent Colot ◽  
Vicki Haedens ◽  
Jean-Luc Rossignol
Keyword(s):  
Extensive Study ◽  
Empty Site ◽  
Site Factors ◽  
Original Sequence ◽  
Ascobolus Immersus ◽  
High Degree ◽  
Hairpin Formation ◽  
Processing Steps ◽  
Color Gene

ABSTRACT Upon insertion, transposable elements can disrupt or alter gene function in various ways. Transposons moving through a cut-and-paste mechanism are in addition often mutagenic when excising because repair of the empty site seldom restores the original sequence. The characterization of numerous excision events in many eukaryotes indicates that transposon excision from a given site can generate a high degree of DNA sequence and phenotypic variation. Whether such variation is generated randomly remains largely to be determined. To this end, we have exploited a well-characterized system of genetic instability in the fungus Ascobolus immersus to perform an extensive study of excision events. We show that this system, which produces many phenotypically and genetically distinct derivatives, results from the excision of a novel Ds-like transposon,Ascot-1, from the spore color gene b2. A unique set of 48 molecularly distinct excision products were readily identified from a representative sample of excision derivatives. Products varied in their frequency of occurrence over 4 orders of magnitude, yet most showed small palindromic nucleotide additions. Based on these and other observations, compelling evidence was obtained for intermediate hairpin formation during the excision reaction and for strong biases in the subsequent processing steps at the empty site. Factors likely to be involved in these biases suggest new parallels between the excision reaction performed by transposons of thehAT family and V(D)J recombination. An evaluation of the contribution of small palindromic nucleotide additions produced by transposon excision to the spectrum of spontaneous mutations is also presented.

scholarly journals Local adaptation and matching habitat choice in female barn owls with respect to melanic coloration

2011 ◽  
Vol 25 (1) ◽  
pp. 103-114 ◽  
Author(s):  
A. N. DREISS ◽  
S. ANTONIAZZA ◽  
R. BURRI ◽  
L. FUMAGALLI ◽  
C. SONNAY ◽  
...  
Keyword(s):  
Local Adaptation ◽  
Habitat Choice ◽  
Barn Owls ◽  
Matching Habitat Choice

scholarly journals Interactions Among Dosage-Dependent Trans-Acting Modifiers of Gene Expression and Position-Effect Variegation in Drosophila

Genetics ◽  
1998 ◽  
Vol 150 (1) ◽  
pp. 251-263 ◽  
Author(s):  
Utpal Bhadra ◽  
Manika Pal Bhadra ◽  
James A Birchler
Keyword(s):  
Gene Expression ◽  
Quantitative Traits ◽  
Position Effect ◽  
Position Effect Variegation ◽  
Developmental Transitions ◽  
Eye Color ◽  
Dosage Effects ◽  
Effect Variegation ◽  
Hierarchical Manner ◽  
Color Gene

Abstract We have investigated the effect of dosage-dependent trans-acting regulators of the white eye color gene in combinations to understand their interaction properties. The consequences of the interactions will aid in an understanding of aneuploid syndromes, position-effect variegation (PEV), quantitative traits, and dosage compensation, all of which are affected by dosage-dependent modifiers. Various combinations modulate two functionally related transcripts, white and scarlet, differently. The overall trend is that multiple modifiers are noncumulative or epistatic to each other. In some combinations, developmental transitions from larvae to pupae to adults act as a switch for whether the effect is positive or negative. With position-effect variegation, similar responses were found as with gene expression. The highly multigenic nature of dosage-sensitive modulation of both gene expression and PEV suggests that dosage effects can be progressively transduced through a series of steps in a hierarchical manner.

Time Coding in Electric Fish and Barn Owls

1986 ◽  
Vol 28 (1-3) ◽  
pp. 122-133 ◽  
Author(s):  
Catherine E. Carr
Keyword(s):  
Electric Fish ◽  
Barn Owls ◽  
Time Coding
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