Inheritance of Egg-Colour in the Parasitic Cuckoos

Nature ◽  
1933 ◽  
Vol 132 (3343) ◽  
pp. 822-822 ◽  
Author(s):  
V. C. WYNNE-EDWARDS
Keyword(s):  
Egg Colour

scholarly journals Estimation of Genetic Parameters for Body Weight and Some Colour Traits in the Seventh-generation Index Selected Nigeria Heavy Local Chicken Ecotype

2021 ◽  
Author(s):  
I.J. Ohagenyi ◽  
F.C. Iregbu ◽  
V.C. Udeh
Keyword(s):  
Body Weight ◽  
Genetic Parameters ◽  
Genetic Correlations ◽  
The Body ◽  
Pedigree Selection ◽  
Egg Colour ◽  
Local Chicken ◽  
Range Test ◽  
Estimation Of Genetic Parameters ◽  
Selection Of

Background: This study was conducted to estimate the genetic parameters of body weight and some colour traits in seventh generation (G7) index selected Nigerian Heavy Local Chicken Ecotype (NHLCE) progenies at point of lay to 12 weeks. Methods: 5 sires and 12 hens were used to generate the progenies used for the experiment. Traits measured included weekly body weight, egg colour, beak colour and feather colour. Data collected were subjected to one way analysis of variance in a Paternal half sib analysis using Animal model of SAS (2003). Four weeks body weight measurements, egg colour, beak colour and feather colour for 5 sires ranged from 1.29±0.05 1.54±0.07; 2.55±0.02 to 4.00±0.02; 2.45±0.02 to 4.83±0.02 and 1.73±0.02 to 4.58±0.04 respectively. Result: The new Duncan’s multiple range test shows that sire families are similar (p greater than 0.05) in the body weight and beak colour, but significantly differed (p greater than 0.05) in the egg colour and feather colour. The heritability estimates of mature body weight for week 3 was medium, while estimates of heritability for weekly mature body weight for weeks 1, 2 and 4, egg colour, beak colour and feather colour of NHLCE were low heritability. Low h2 of traits suggest that progeny and pedigree selection could be employed for improvement of the egg colour, beak colour and feather colour of NHLCE. The study showed positive genetic correlations between beak colour and egg colour, negative genetic correlations between beak and feather colour. This means that no decision can be taken in isolation as the selection of one trait will have consequences on other traits.

The evolution of egg colour and patterning in Australian songbirds

Evolution ◽  
2021 ◽  
Author(s):  
Kiara L L'Herpiniere ◽  
Amy R Tims ◽  
Daisy Englert Duursma ◽  
Simon C Griffith
Keyword(s):  
Egg Colour

The evolution of egg colour and patterning in birds

2006 ◽  
Vol 81 (03) ◽  
pp. 383 ◽  
Author(s):  
R. M. Kilner
Keyword(s):  
Egg Colour

An assessment of possible intraspecific brood parasitism in ring-billed gulls

1984 ◽  
Vol 62 (9) ◽  
pp. 1680-1684 ◽  
Author(s):  
Peter M. Fetterolf ◽  
Hans Blokpoel
Keyword(s):  
Brood Parasitism ◽  
Egg Laying ◽  
Present Evidence ◽  
Intraspecific Brood Parasitism ◽  
Egg Shape ◽  
Larus Delawarensis ◽  
Egg Colour ◽  
Lower Fertility ◽  
Nest Initiation

Ring-billed gull (Larus delawarensis) egg colour, egg dimensions, egg shape, egg-laying intervals, nest initiation dates, and fertility were documented at several different colonies over a 6-year period. Significantly greater variability in egg dimensions and egg shape, lower fertility, and atypical laying intervals in mixed-coloured clutches compared with even-coloured clutches suggest that more than one female laid eggs in mixed-coloured clutches. We present evidence that some odd-coloured eggs were laid by females that parasitized nests.

scholarly journals Increase of clutch size triggers clutch destruction behaviour in common moorhens (Gallinula chloropus) during the incubation period

Behaviour ◽  
2013 ◽  
Vol 150 (2) ◽  
pp. 215-223 ◽  
Author(s):  
Longwu Wang ◽  
Canchao Yang ◽  
Yu-Cheng Hsu ◽  
Anton Antonov ◽  
Arne Moksnes ◽  
...  
Keyword(s):  
Incubation Period ◽  
Clutch Size ◽  
Brood Parasitism ◽  
Egg Laying ◽  
Egg Recognition ◽  
Conspecific Brood Parasitism ◽  
Egg Discrimination ◽  
Incubation Stage ◽  
Egg Colour ◽  
Egg Destruction

Conspecific brood parasitism (CBP) is common in a variety of animal taxa, including birds. In coots (Fulica spp.), and the closely related moorhens (Gallinula spp.), such parasitism is especially common, and hosts experience considerable costs through increased chick competition soon after hatching. Hence, these birds have evolved egg recognition and rejection abilities, e.g., egg counting, burying the foreign eggs, assigning them suboptimal positions within the mixed clutch, or deserting parasitized clutches. For common moorhens (Gallinula chloropus) it has been shown that desertion of parasitized nests pays most at the early egg laying stage. Later on, the costs of desertion exceed the costs of brood parasitism and acceptance is favoured. Here we tested moorhen egg discrimination behaviour during the incubation stage when acceptance of foreign eggs is expected. Four treatments were applied: (1) single added non-mimetic pale blue egg, (2) single added non-mimetic white chicken egg, (3) four foreign conspecific eggs added to the clutch and (4) four foreign conspecific eggs exchanged for four host eggs. Moorhens responded by egg destruction (47%) only to the increased clutch size but not to foreign egg colour and size match. In three nests where egg destruction occurred, all the eggs in the mixed clutch were destroyed by pecking, in two other nests one of the foreign eggs were pecked, while two other nests were deserted. These results are puzzling since moorhens have been shown to possess refined egg recognition abilities. To our knowledge, such destruction of parasitized clutches by moorhens during incubation has not previously been reported. We suggest that after clutch completion, moorhens use increase in clutch size as a cue to determine if they have been parasitized, and some individuals choose to reject parasitic eggs by deserting or destroying the whole clutch.

Dinosaur egg colour had a single evolutionary origin

Nature ◽  
2018 ◽  
Vol 563 (7732) ◽  
pp. 555-558 ◽  
Author(s):  
Jasmina Wiemann ◽  
Tzu-Ruei Yang ◽  
Mark A. Norell
Keyword(s):  
Evolutionary Origin ◽  
Egg Colour

AN AUTOSOMAL RECESSIVE (NEUROPTERA: CHRYSOPIDAE) MUTANT IN A NEUROPTERAN

1971 ◽  
Vol 103 (6) ◽  
pp. 906-907 ◽  
Author(s):  
Maurice J. Tauber ◽  
Catherine A. Tauber
Keyword(s):  
Autosomal Recessive ◽  
Green Lacewing ◽  
Complete Penetrance ◽  
Chrysopa Carnea ◽  
Egg Colour

AbstractBlue, a non-sex-linked mutant of the green lacewing, Chrysopa carnea Stephens, is recessive and shows complete penetrance. Unlike the coloration of the larva or imago, egg colour, which is due to the yolk, is the same as that of the maternal phenotype.

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