scholarly journals EGG QUALITY TRAITS IN WG, GG AND GL JAPANESE QUAIL POPULATIONS

2019 ◽  
Vol 17 (1) ◽  
pp. 49-55 ◽  
Author(s):  
H. Lukanov ◽  
A. Genchev ◽  
P. Kolev
Keyword(s):  
Japanese Quail ◽  
Shell Thickness ◽  
Egg Quality ◽  
Shape Index ◽  
Egg Mass ◽  
Quality Traits ◽  
Egg Weight ◽  
Poultry Breeding ◽  
Average Shape

The aim of the study was to evaluate egg quality traits in three heavy Japanese quail populations created and reared in the Poultry Breeding Unit of the Trakia University – Bulgaria, marked as WG, GG and GL. In the experiments, 160 female birds from populations WG and GG, and 96 birds from population GL were tested up to the 6th production month. The main egg quality traits were controlled. The highest average egg weight was registered in WG group and the lowest in GL group, 14.04±0.32 g and 12.79±0.29 g respectively (p<0.05). The highest average Shape index was observed in group GG (78.31±0.53%), vs the lowest in WG quails (77.55±0.62%). Albumen proportion is almost 2/3 of egg mass, with average values from 57.14% in group WG tо 59.90% in group GG. Yolk proportion was about 30%, with smaller differences between the groups. The shell share from all tested groups comprised between 10.95 and 12.58% of egg weight. Average shell thickness was the greatest in eggs of WG quails (223.53±5.52 μm), and the lowest – in GG quails (216.91±6.83 μm). Egg quality traits were typical for the meat productive type of Japan quails.

scholarly journals Egg quality of Japanese quail in Serbia (Coturnix coturnix japonica)

2012 ◽  
Vol 28 (3) ◽  
pp. 425-431 ◽  
Author(s):  
Mirjana Djukic-Stojcic ◽  
N. Milosevic ◽  
L. Peric ◽  
I. Jajic ◽  
N. Tolimir
Keyword(s):  
Japanese Quail ◽  
Shell Thickness ◽  
Egg Quality ◽  
Breaking Strength ◽  
Shape Index ◽  
The Other ◽  
Coturnix Japonica ◽  
Egg Mass ◽  
Quality Traits

In the last years Japanese quail (Conturnix coturnix japonica) is becoming more popular as a source of meat and eggs. Information on egg quality characteristics has been limited mostly to chicken eggs. The aim of this paper is to enhance the knowledge on the quality of quail eggs. In this study external and internal quality traits of quail eggs from three different commercial farms will be presented. For egg mass, shape index, shell thickness, shell mass no significant difference was found between farms. For yolk colour, yolk and albumen mass, statistically significant differences were found between the three farms. The difference in shell breaking strength between farms A and B was not significant and significant differences were found between eggs from farm C. Yolk, albumen and shell percentage were in the same relation as the mass of these parameters. The worst albumen quality was recorded in eggs from farm A. The parameters yolk colour, Haugh Unit and egg proportions (albumen, yolk and shell) do not differ between chicken and quail eggs. On the other hand, parameters which differ are egg mass (about five times smaller at quail eggs), shape index, shell breaking strength and shell thickness, which was to be expected. The external and internal egg quality traits of quail eggs from three farms in Serbia do not differ from the results of quality traits from other countries. On the other hand, this investigation contributes the development of science, because it includes some parameters, which have so far not been published in literature by other researchers from this area.

scholarly journals RELATIONSHIP BETWEEN LAYING AGE AND REPEATABILITY OF EGG QUALITY TRAITS

2021 ◽  
Vol 21 ◽  
pp. 66-70
Author(s):  
S. N. Ibe ◽  
J. C. Okonkwo
Keyword(s):  
Linear Relationship ◽  
Shell Thickness ◽  
Egg Quality ◽  
Shape Index ◽  
Curvilinear Relationship ◽  
Quality Traits ◽  
General Increase ◽  
Egg Weight ◽  
Consistent Increase

Repeatability of 22 -, 26, 30 - and 32 - week egg weight (EW)., shell thickness (ST), Haugh (1955) unit (HU), yolk index (Yl)and shape, index (SI) was estimated based on the first three eggs laid in the week by fifty - six commercial Harco pullets. There was a consistent increase in repeatability estimates for these traits as laying age progressed. The estimates ranged from 0.67 to 0.85, 0.53 to 0.84., 0.51 to 0.87, 0.20 to  0.61 and 0.26 to 0.52 for EW, ST, HU, YI and Si, respectively. While repeatability of EW  increased by 0.02 units per week, that of HU increased by 0.03 and 0.04 unit per week, respectively. Repeatability of EW, ST and HU showed a linear relationship with age, whereas that of YI and ȘI showed a linear relationship with age, whereas that of YI and SI showed a curvilinear relationship with age. The general increase in repeatability of each trait with age indicates that fewer records will be required to adequately characterize the inherent producing ability of each hen for the trait as laying age progressed. 

scholarly journals REPEATABILITY OF EGG NUMBER AND EGG QUALITY TRAITS IN COMMERCIAL PULLETS

2021 ◽  
Vol 21 ◽  
pp. 71-75
Author(s):  
J. C. Okonkwo ◽  
S. N. Ibe
Keyword(s):  
Genetic Gain ◽  
Shell Thickness ◽  
Egg Quality ◽  
Shape Index ◽  
Quality Traits ◽  
Egg Weight ◽  
Egg Number ◽  
Selection For ◽  
Haugh Unit

Repeatability estimates of 0.09 for egg number to 30 weeks of age; 0.67, 0.53, 0.51 0.20 and 0.26 for egg weight (EW), shell thickness (ST), Haugh unit (HU), yolk index (YI) and shape index (SI), respectively, at 22 weeks of age; and 0.85, 0.78, 0.82, 0.49 and 0.62 for the same traits, respectively at 30 weeks of age were obtained in a flock of exotic commercial pullets reared in cages. The expected relative genetic gain per generation of selection for repeated records was inversely related to the magnitude of repeatability. Thus, as laying progressed, repeatability estimates became higher and expected genetic gain from using additional records decreased and fewer records were required to characterize the pullets for inherent transmitting ability. While 4 eggs per hen areconsidered adequate for 22 - week EW, ST and HU, 8 eggs are required for YI and ŞI. The considered numbers of eggs for corresponding traits at 30 weeks are 3 and 4, respectively. Measurements on 10 eggs per hen are required for egg number to 30 weeks.

scholarly journals Quality of eggs from pasture rearing layers of different genotypes

2020 ◽  
Vol 36 (2) ◽  
pp. 181-190
Author(s):  
Zdenka Skrbic ◽  
Milos Lukic ◽  
Veselin Petricevic ◽  
Snezana Bogosavljevic-Boskovic ◽  
Simeon Rakonjac ◽  
...  
Keyword(s):  
Shell Thickness ◽  
Egg Quality ◽  
Egg Yolk ◽  
Vegetation Period ◽  
Shape Index ◽  
Quality Parameters ◽  
Egg Weight ◽  
Naked Neck ◽  
Quality Properties ◽  
Shell Quality

The comparison of physical quality properties of table eggs of commercial hybrid Tetra SL and two native indigenous breeds of hens, Banat Naked Neck and Svrljig hen, was performed in conditions of alternative production in the pasture system in portable cages without the floor. The experiment was conducted during the vegetation period, at the age of hens of 53-57 weeks. In order to produce good quality eggs, the diet was designed with a complete mixture based on maize and soybean. In addition, constant availability of pastures was ensured. Egg sampling was performed in the morning and the initial egg quality was examined based on egg weight, shape index, egg white, egg yolk and shell quality parameters. Layer hens of the commercial hybrid Tetra SL had significantly higher egg weight and better internal egg quality (p<0.01) compared to hens of Banat Naked Neck and Svrljig hens, except for the colour of the yolk, which was more intense in the same feeding and breeding conditions and the age of laying hens, in eggs of native breeds (p<0.01). Native breeds in relation to the commercial hybrid had lighter shell colour (p<0.01). Deformation and egg shell thickness differed (p<0.01) between all three genotypes. The determined rank of layer hen genotypes for shell thickness was: Tetra SL, Banat Naked Neck, Svrljig hen. However, the breaking force was without statistically confirmed difference between hen genotypes.

scholarly journals Influence of strain and production cycle on egg quality traits of two Nigerian indigenous chicken strains

2020 ◽  
Vol 45 (2) ◽  
pp. 29-39
Author(s):  
V. U. Oleforuh-Okoleh ◽  
U. M. Chukwuemeka ◽  
G. O. Adeoye
Keyword(s):  
Egg Quality ◽  
Shape Index ◽  
Internal Quality ◽  
Production Cycle ◽  
Strain Effect ◽  
Quality Traits ◽  
Indigenous Chicken ◽  
Egg Weight ◽  
Naked Neck ◽  
Egg Shape

Records obtained from purebred normal feather and naked neck Nigerian indigenous chicken strains were used to assess the influence of strain and production cycle on external and internal egg quality traits. The assessment commenced from first lay to 120 days of lay, classified into four production cycles (PC): PC1 (1-30 days of lays), PC2 (31-60 days of lays), PC3 (61-90 days of lays), and PC4 (91-120 days of lays). Mean egg weight, length and breadth were 4.34% heavier, 2.10% longer and 1.72% wider in the normal feather than in the naked neck (p<0.05). No disparity due to strain effect was found in egg shape index. Eggshells from the two strains had similar weight but varied in thickness with shells from the naked neck being 0.02mm thicker than those from the normal feather (p<0.05). Eggs from the normal feather were 7.13, 5.76, 5.00, 7.10 and 8.11% superior in albumen weight, yolk height, albumen height, yolk index, and albumen index, respectively compared to its naked neck counterpart (p<0.05). Production cycle significantly influenced all external egg quality studied. An increase of 16.21% in egg weight was obtained by PC4. Egg length and breadth increased consistently with each subsequent PC (p<0.05) whereas egg shape index decreased with PC (p<0.05). Higher values were recorded for yolk weight, yolk and albumen length and width in each subsequent production cycle. Haugh unit, yolk and albumen height had best values at PC2. Our findings indicate that strain type and production cycle highly influenced egg quality traits of Nigerian indigenous chickens with the normal feather showing superiority. Furthermore, the best internal quality was obtained at PC2 (31-60 days of lay). Our findings could be useful in choosing selection criterion traits in breeding plans for the development of different layer lines of normal feather and naked neck.

scholarly journals Fertility of Uncontrolled Village Flock Eggs and Comparison of Quality Traits of Table-Eggs Produced in Different Production Systems

2021 ◽  
Vol 9 (2) ◽  
pp. 356-361
Author(s):  
Musa Sarıca ◽  
Kadir Erensoy ◽  
Ayşe İpek Özsoy
Keyword(s):  
Shell Thickness ◽  
Egg Quality ◽  
Production Systems ◽  
Shape Index ◽  
Organic Production ◽  
Internal Quality ◽  
Quality Traits ◽  
Storage Duration ◽  
Free Range ◽  
The Village

In this study, the eggs produced in uncontrolled village conditions were compared to free-range, organic and cage-system in two seasons, in autumn and spring, in terms of external and internal quality traits. In the autumn and spring period, 110 eggs were collected from the village eggs and 50 eggs from other production systems. In order to determine the fertility in the village eggs, 60 eggs were placed in a laboratory type incubator in both seasons and fertility control was made at the 18th day. All data of egg quality traits were performed by taking the average of the two seasons. Egg shape index, shell ratio, shell thickness, shell cleanness, shell defects, albumen and yolk traits differed significantly among production systems (P < 0.05). The lowest shape index, shell thickness and shell cleanness were found in village eggs. Higher shell rates were determined from eggs in cage and organic production compared to others (P < 0.05). The yolk height and yolk index were the lowest and the yolk colors were the darkest in the white cage eggs (P < 0.05). Brown cage eggs showed the better results in the majority of their quality traits. However, they had a higher meat and blood-spot level than other systems. In addition, the presence of cockerels in the village flocks caused the fertile eggs and approximately 85% fertility was obtained. Our results showed that it has become obvious that the village hen and free range hen eggs which can be marketed in high prices compared to the commercial eggs, have no superiority in terms of the traits they are considered. Besides, as they are significantly fertile, especially in hot summer months, according to storage duration and conditions, the probability of embryo development for these eggs has turned to be of high importance for consumption.

scholarly journals Changes in egg quality traits associated with long-term selection for lower yolk cholesterol content in Japanese quail

2008 ◽  
Vol 53 (No. 3) ◽  
pp. 119-127 ◽  
Author(s):  
J. Baumgartner ◽  
Z. Končeková ◽  
J. Benková ◽  
D. Peškovičová ◽  
J. Simenovová ◽  
...  
Keyword(s):  
Egg Quality ◽  
Shape Index ◽  
Cholesterol Content ◽  
Quality Traits ◽  
Egg Weight ◽  
Term Selection ◽  
Edible Part ◽  
Selection For ◽  
Yolk Cholesterol

In the present paper we describe the basic results of long-term selection for low yolk cholesterol content in Japanese quail and its influence on development and relationship with other egg quality traits during nineteen selected generations. The changes in a selected low cholesterol line were compared with changes in an unselected control line to obtain the real selection response to estimated traits. There was a significant decrease in yolk cholesterol content from 1 815 mg/100 g of fresh yolk (P generation) to 1 522 mg/100 g yolk (S19 generation). According to the value of regression coefficient <I>b</I> the decrease per one generation was 15.71 mg/100 g yolk. The decrease in cholesterol of the edible part of egg was also effective and it significantly decreased by 11.29 mg/100 g of the edible part of egg in each generation. There were only insignificant changes in egg weight, but we found a significant increase in yolk weight during selected generations. According to the regression analysis the increase in yolk weight was 0.019 mg/100 g per one generation. There were a positive but insignificant increase also in albumen weight, shell weight and weight of the edible part of egg. We found a small and insignificant decrease in shape index. We determined very high and significant positive correlations between cholesterol content in yolk and cholesterol content in the edible part of egg (0.801+++) and significant negative correlations between yolk cholesterol content and egg weight (–0.515+), yolk weight (–0.468+) and weight of the edible part of egg (–0.475). There were only low, positive and insignificant correlations between yolk cholesterol content and yolk egg proportion and egg shape index.

scholarly journals Impact of Different Rearing Systems and Age on Bovans White Layer’s Performance, Egg Quality Traits and Synthesis of Heat Shock Protein 70 kDa

2018 ◽  
Vol 18 (4) ◽  
pp. 1045-1060 ◽  
Author(s):  
Yasin Baykalir ◽  
Ulku Gulcihan Simsek
Keyword(s):  
Heat Shock Protein 70 ◽  
Egg Production ◽  
Egg Quality ◽  
Shape Index ◽  
Quality Traits ◽  
Conventional System ◽  
Shell Weight ◽  
Organic System ◽  
Egg Weight ◽  
System P

AbstractThis study was conducted to investigate the performance of laying hens and to determine possible age-related changes on external and internal quality traits of their eggs and synthesis of heat shock protein 70 kDa (HSP70) in the conventional cage and organic rearing systems. For this purpose, 4 different Bovans White hybrid flocks of the same age were monitored in each of these two systems for 52 weeks. While a total of 360 eggs were examined to determine the effects of rearing system and age (30 and 60 weeks) on egg quality traits, 48 liver tissue samples were examined for the analysis of HSP70. Egg production (hen-day) and dirty egg ratio were higher in the organic rearing system (P<0.05). The age at 50% yield, the age at peak of lay, and peak production rate were calculated as 156, 218.75 days and 95.98% in the conventional system, and 155.75, 201.50 days, and 96.56% in the organic system, respectively (P>0.05). While egg weight, albumen weight, yolk weight, shell weight, shape index, and yolk colour were higher in the organic system, the crude ash ratio of eggshell and shell ratio were higher in the conventional system (P<0.05). It was also found that the egg weight, albumen weight, yolk weight, shell weight, and the percentage of yolk were higher at 60 weeks of age (P<0.001). The percentage of shell and albumen, shape index, and yolk colour were higher at 30 weeks of age (P<0.001). The interactions between rearing system and age were statistically significant in terms of shell thickness, shape index, crude ash ratio, and yolk colour (P<0.001). Stress protein (HSP70) level was affected only by the rearing system and was higher in the organic system (P<0.001). As a result, the organic system can be considered as advantageous in terms of egg production and quality traits and the eggs of young hens exhibited better properties. The high level of HSP70 in the organic system could indicate that hens were affected by the environmental conditions at higher rates and/or the hens reared in the organic system had a stronger antioxidant defence system.

scholarly journals The Effect of Genotype and Age of Layer Breeders on Egg Quality Traits

2020 ◽  
Vol 36 (2) ◽  
pp. 228-236
Author(s):  
S. O. Olawumi ◽  
J. T. Ogunlade
Keyword(s):  
Egg Quality ◽  
Shape Index ◽  
Age Effect ◽  
Quality Traits ◽  
Eggshell Thickness ◽  
External Quality ◽  
Egg Weight ◽  
Effect Of Age ◽  
Haugh Unit

The external and internal qualities of 120 eggs (60:60) from Isa Brown (IB) and Bovan Nera (BN) layer breeders were evaluated at 15th and 30th week of their production. The genotypes differed significantly (P<0.09) m external egg quality traits except egg weight and egg length. IB recorded higher values in egg width, eggshell weight, eggshell thickness, shape index and shell ratio than BN, while the reverse trend was for egg length. This implies that IB genotype produced eggs with thicker shells than BN, which invariably will lead to a reduction in the rate of cracks and leakages both on the farm and in the hatchery thereby enhancing better hatchability. The age effect was significant (P<0.05) for all the external egg quality traits. The analysis showed that eggs produced at 30th week were better in terms of external quality traits with the exception of egg shape index. There was positive and significant (P <0.05) interaction effect between genotype and age on eggshell width and shell ratio but not for other traits. As regards internal egg quality traits, the genotypes differed significantly (P<0.05) in all the traits except yolk width, yolk height and albumen weight. IB recorded higher (P<0.05) values in yolk weight, albumen width and yolk ratio than BN, while the latter recorded higher values in albumen height, albumen ratio and haugh unit (HU) than the former The effect of age on internal traits was positive and significant (P<0.05) with the exception f yolk width, albumen width, yolk ratio and albumen ratio. The result showed that the 30th week analyses recorded higher (P<0.05) values in these traits than 15th week. This implies that the quality of breeding eggs improves with the advancing age of the birds. Breed x age interactions were significant for yolk weight and albumen width but not found for other traits. IB genotype was considered the best for external egg quality traits and produced thicker eggshell. However, BN genotype produced superior egg quality than lB having recorded higher values (P< 0.05) in HU, which is a determinant of egg quality

scholarly journals Egg quality in different lines of New Hampshire and Giriraja chicken

2021 ◽  
Vol 49 (2) ◽  
pp. 108-118
Author(s):  
N Baskota ◽  
M Sharma ◽  
N Bhattrai ◽  
D Neupane ◽  
RK Yadav ◽  
...  
Keyword(s):  
New Hampshire ◽  
Significant Variation ◽  
Shell Thickness ◽  
Egg Quality ◽  
Shape Index ◽  
Quality Parameters ◽  
Quality Parameter ◽  
Egg Weight ◽  
Egg Diameter ◽  
Better Than

This study was undertaken to evaluate the egg quality parameters of New Hampshire and Giriraja by maintaining four different flocks (lines) of New Hampshire viz. NH-Khajura, NH-Parwanipur, NH-Khumaltar and NH-Pokhara and three different flocks (lines) of Giriraja viz. GR-Pakhribas, GR-Khumaltar and GR-Tarhara. The 40-60 weeks of hatchability, fertility, external and internal egg quality parameters were studied and recorded. A total of 200 birds (40 weeks of age) of each New Hampshire and Giriraja from each line were maintained on deep litter system. Results from this study indicated the significant effect of genotype and respective lines on fertility and hatchability of eggs. Significant (P<0.05) variation in fertility and no significant variation in hatchability for genotypes were found. However, in terms of fertility and hatchability, there were significant variations in different lines. In case of egg weight:  no significant (P<0.01) variation was obtained for genotype but lines comparison showed significant variation. Other external egg quality parameters like egg length, egg diameter, shape index, shell thickness were examined for evaluating the genotype and line effect. In all these external egg quality parameters, there were significant (P<0.01) effect of both genotype and lines of birds. For internal egg qualities, yolk weight (g), yolk index, albumen weight and albumen index were checked. Genotype had no significant (P<0.01) effect but lines had significant (P<0.01) effect on yolk weight. In case of yolk index, both genotype and lines of bird had no significant effect. For albumen weight and albumen index, genotype of birds had no significant (P<0.01) effect but lines of bird had significant (P<0.01) effect on both parameters. The study showed that the egg quality parameters of NH (Khajura) were better than that of GR. Among different lines New Hampshire (Khajura) showed better performance in terms of egg quality parameter. Bang. J. Anim. Sci. 2020. 49 (2): 108-118

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