scholarly journals Strain variations in some reproductive and production traits of purebred normal feather and naked neck FUNAAB Alpha chicken

2021 ◽  
Vol 48 (1) ◽  
pp. 12-23
Author(s):  
V. U. Oleforuh-Okoleh ◽  
O. C. Emeka ◽  
E. U. Obianwuna ◽  
B. S. Nnam
Keyword(s):  
Egg Production ◽  
Embryonic Mortality ◽  
Production Traits ◽  
Leg Length ◽  
Feed Conversion ◽  
Naked Neck ◽  
High Incidence ◽  
Chest Girth ◽  
Naked Neck Gene ◽  
Better Than

This study was conducted to investigate reproductive and production traits in purebred normal feather and naked neck strains of FUNAAB alpha chicken (FAC) breed. Forty-five weeks old birds comprising 70 hens and 13 cocks per strain selected from random-bred populations of each strain were purebred and used to study strain variations in fertility and embryonic mortality. Their progenies were compared for juvenile growth performance (day- old to 12 weeks of age), as well as short term egg production traits (from first lay to 280 days of age). Analysis of data using multivariate analysis with strain and hatch set as fixed factors revealed that though fertility was 6.75% higher in the naked neck strain, high incidence of embryonic mortality (41.79%) especially during the first and last 7 days of incubation resulted in poor hatchability (P<0.05). Though the normal feather chicks weighed 8.92% heavier than the naked neck at day-old, those from the naked neck had generally better feed conversion ration which translated to 8.55% heavier weight for them at 12 weeks of age (P<0.05). Generally, the naked neck strain was also superior (P<0.05) to the normal feather strain wing length, chest girth and leg length. Results on laying traits revealed that the normal feather hens performed better than the naked neck hens. They became sexually matured 1.87 weeks earlier than the naked neck hens, had a better feed conversion ratio of2.25 and 3.70% higher rate of egg production at 280 days of age. Egg production was at its peak at 25-28 weeks of age and declined from 37- 40 weeks of age in both strains. Our observation suggests that though possession of naked neck gene appeared to increase embryonic mortality, both strains can be successfully be incorporated in breeding plans for further genetic improvement and development of egg lines (using the normal feather strain) and meat lines (using the naked neck).     Cette étude a été menée pour étudier les traits reproducteurs et de production de la race normale de race pure et du cou nu de la race de poulet alpha FUNAAB (le 'FAC'). Les oiseaux de quarante-cinq semaines comprenant 70 poules et 13 coqs sélectionnés parmi les populations élevées au hasard de chaque souche étaient de race pure et utilisés pour étudier les variations de la fertilité et de la mortalité embryonnaire. Leurs descendances ont été comparées pour la performance de croissance juvénile (de jour à 12 semaines d'âge), aussi bien que les traits à court terme de production d'oeuf (du premier laïg à 280 jours d'âge). L'analyse des données utilisant l'analyse multivariée avec la souche et l'ensemble d'écoutille comme facteurs fixes a indiqué que bien que la fertilité ait été 6.75% plus élevée dans lasouche nue de cou, l'incidence élevée de mortalité embryonnaire (41.79%) particulièrement au cours des 7 premiers et derniers jours d'incubation a entraîné une mauvaise éclosion (P<0,05). Bien que les poussins à plumes normales pesaient 8,92 % plus lourd que le cou nu à l'âge d'un jour, ceux du cou nu avaient généralement une meilleure ration de conversion des aliments, ce qui se traduit par un poids 8,55 % plus lourd pour eux à l'âge de 12 semaines (P<0,05). En général, la tension nue de cou était également supérieure (P<0.05) à la longueur normale d'aile de contrainte de plume, à la circonférence de coffre et à la longueur de jambe. Les résultats sur les traits de ponte ont révélé que les poules à plumes normales ont obtenu de meilleurs résultats que les poules nues au cou. Ils sont devenus sexuellement mûris 1,87 semaines plus tôt que les poules cou nu, avait un meilleur ratio de conversion des aliments pour animaux de 2,25 et 3,70% plus élevé taux de production d'œufs à 280 jours d'âge. La production d'œufs était à son apogée à l'âge de 25-28 semaines et a diminué de 37- 40 semaines d'âge dans les deux souches. Notre observation suggère que bien que la possession du gène nu de cou semble augmenter la mortalité embryonnaire, les deux souches peuvent être avec succès incorporées dans les plans de reproduction pour davantage d'amélioration génétique et de développement des lignes d'oeuf (utilisant la souche normale de plume) et des lignes de viande (utilisant le cou nu).        

scholarly journals DOMINANCE AND EPISTASIS IN HETEROSIS OF WHITE LEGHORN STRAIN CROSSES

1987 ◽  
Vol 67 (3) ◽  
pp. 663-680 ◽  
Author(s):  
R. W. FAIRFULL ◽  
R. S. GOWE ◽  
J. NAGAI
Keyword(s):  
Body Weight ◽  
Sexual Maturity ◽  
Egg Production ◽  
Significant Contribution ◽  
Production Traits ◽  
White Leghorn ◽  
Cross Combination ◽  
Commercial Strain ◽  
Better Than

Four unrelated pure strains of White Leghorns including a grandparent strain from industry and 12 two-strain, 24 three-strain, 24 four-strain and 12 F2 strain crosses produced contemporaneously were used to examine the role of dominance and epistasis in heterosis. A control strain and a commercial strain were also included. For egg weight, the heterosis observed closely approximated that expected due to dominance alone. For sexual maturity and body weight, dominance was the major component of heterosis, but epistasis made a significant contribution — additive by additive (A × A) genetic effects for sexual maturity and 140-d body weight, and parental epistasis for mature body weight. Both dominance and epistasis played a significant role in heterosis for egg production traits. A × A, dominance by dominance (D × D) and additive by dominance (A × D) epistasis were all important for hen-housed egg production and hen-housed egg yield. For hen-day rate of egg production, A × A epistasis was significant only early in the laying year (to 273 d), A × D and D × D were significant to 385 d and in the full year (to 497 d); however, none (A × A, A × D and D × D) was significant near the end of lay (386–497 d). Overall heterosis estimates for full year egg production measured as hen-housed egg production to 497 d or hen-day rate from housing to 497 d clearly showed that on average two-strain crosses were superior to three-strain crosses which were superior to four-strain crosses which in turn exceeded the F2 crosses. Nevertheless, several three-strain crosses had performance for egg production that was equal to or better than the two-strain cross with the highest egg production. Thus, in commerce, where the level of egg production is of great economic importance, the testing and use of a specific three-way cross combination will usually result in a better commercial product. Key words: Heterosis, egg production genetics, epistasis, stocking rate, strain cross, White Leghorn

scholarly journals Performance of Rhode Island Red, Black Australorp, and Naked Neck crossbreds under alternative production systems

2020 ◽  
Vol 50 (4) ◽  
pp. 564-577
Author(s):  
M. Usman ◽  
A. Mahmud ◽  
J. Hussain ◽  
A. Javid
Keyword(s):  
Surface Area ◽  
Rhode Island ◽  
Production System ◽  
Egg Production ◽  
Egg Quality ◽  
Production Systems ◽  
Egg Volume ◽  
Egg Weight ◽  
Naked Neck ◽  
Better Than

The effects of the production system, breed cross, and their interaction on performance, egg quality, and hatching traits were evaluated. Rhode Island Red and Black Australorp were crossed with Naked Neck chickens (first generation RNN, and BNN, respectively). These crosses were mated among themselves and crossed to produce four crossbreds: RR (RNN x RNN), BB (BNN x BNN), RB (RNN x BNN), and BR (BNN x RNN). Thirty-six pullets and 9 cockerels from each crossbred were maintained in three production systems: the aviary system (AV), conventional cages (CC), and enriched cages (EC). Thus there were 48 pullets and 12 cockerels in each production system. Bodyweight, egg production percentage, and egg weight were highest in EC, followed by CC and AV. Higher egg weight, egg surface area, and egg volume were also observed in EC compared with CC and AV. Fertility and hatchability were higher and early embryonic mortality was lower in AV than in EC and CC. Bodyweight, egg production percentage, egg weight, egg volume, and surface area were higher for RB and BR than for BB and RR. Fertility and hatchability were similar for RB and BR. RR was similar to BR, but lower than RB. BB had the lowest fertility and hatchability. Thus, chickens in EC performed better than in the other systems, except that hatching traits were better in AV. RB and BR performed better than BB and RR.Key words: breed crosses, chicken, egg quality, hatchability

scholarly journals COMPARATIVE INVESTIGATION OF EGG PRODUCTION IN WG, GG AND GL JAPANESE QUAIL POPULATIONS

2018 ◽  
Vol 16 (4) ◽  
pp. 334-343 ◽  
Author(s):  
H. Lukanov ◽  
A. Genchev ◽  
P. Kolev
Keyword(s):  
Japanese Quail ◽  
Egg Production ◽  
Comparative Investigation ◽  
Production Traits ◽  
Feed Conversion ◽  
Egg Weight ◽  
Production Type ◽  
Poultry Breeding

The aim of the study was to evaluate egg production 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 female birds from population GL were tested up to the 6th production month. The main egg production traits were controlled. The highest egg production for the period was demonstrated in group GL (79.84±4.46%), followed by group GG (76.33±3.40%) and group WG (72.11±4.16%). Quails from the WG group were outlined with least efficient feed conversion per egg (74.49±1.21 g feed), while those from the GL group: with the most efficient one – 64.93±1.41 g (p<0.01). The highest average egg weight in descending order was observed in the WG group (14.04±0.32 g), GG group (13.65±0.27 g) and GL group (12.79±0.29 g). The Japanese quail populations created and maintained at the Trakia University showed a potentially good egg production for the production type they belonged to, which makes them attractive for use in interline hybridisation schedules, including for production of autosexing stock layers.

Production traits and hatching of a Barred Rock 1 pure line, its feather sexable strains and their crosses

2012 ◽  
Vol 52 (10) ◽  
pp. 945 ◽  
Author(s):  
Ismail Durmus ◽  
Huseyin Goger ◽  
Sahnur Demirtas ◽  
Sermin Yurtogullari
Keyword(s):  
Rhode Island ◽  
Sexual Maturity ◽  
Egg Production ◽  
Pure Line ◽  
Embryonic Mortality ◽  
Production Traits ◽  
Egg Weight ◽  
Significant Difference ◽  
Early Embryonic Mortality

The study was carried out to identify some production traits of the pure Barred Rock 1 (BR1) line and rapid × slow feathering line crosses derived from the BR1 pure line, in addition to F1 crosses of all these dam lines with Rhode Island Red 1 sire line. The BR1 line previously used a brown layer dam line for barred/non-barred day-old chick auto-sexing and synthetic slow and rapid wing feathering lines. Parent lines showed significant differences in sexual maturity and egg production (P < 0.01) and early embryonic mortality (P < 0.05). However, there was no significant difference in weight at sexual maturity, average egg weight, hatchability of fertile eggs, hatchability of total eggs set, and middle and late embryonic mortalities. A significant difference was found among F1 crosses with respect to weight at sexual maturity (P < 0.05), but no significant difference (P > 0.05) could be determined for age at sexual maturity and egg production. Overall, rapid feathering hens had better production traits than slow feathering hens. The dual crossbred parent lines exhibited almost the same level of egg production traits compared with the pure line.

Effect of triticale, lucerne pellets, furazolidone, ethoxyquin and oxycarotenoids on egg yolk colour and performance of crossbred layers

1978 ◽  
Vol 18 (92) ◽  
pp. 396 ◽  
Author(s):  
H Karunajeewa
Keyword(s):  
Ethyl Ester ◽  
Egg Production ◽  
Production Efficiency ◽  
Acid Ethyl Ester ◽  
Egg Yolk ◽  
Production Traits ◽  
Feed Conversion ◽  
Egg Yolks ◽  
And Performance ◽  
Reduced Rate

In the first of two factorial experiments, 26-week-old crossbred pullets were fed for a period of 24 weeks diets with lucerne either in the form of meal or crumbled pellets, with or without 25 p.p.m. furazolidone and with 1 p.p.m. of either G-apo-8'-carotenoic acid ethyl ester or canthaxanthin. In the second experiment, crossbred hens aged 58 weeks were fed for a period of 16 weeks either triticale or wheat, or triticale plus wheat or wheat plus oats on a free choice basis with a concentrate mixture containing either 0 or 333 p.p.m. of ethoxyquin. Lucerne pellets reduced rate of egg production, hen-housed production, efficiency of feed conversion and the income per bird. It increased feed intake by 3.2 per cent and egg yolk colour by 2 per cent. Furazolidone increased hen-housed production and efficiency of feed conversion but had no effect on egg yolk colour. Pullets given diets with canthaxanthin laid eggs with higher yolk colour scores and specific gravity and converted feed more efficiently than those given the diets with G-apo-8'-carotenoic acid ethyl ester. The depressive effect of lucerne pellets on egg production and feed conversion was overcome by both furazolidone and canthaxanthin. Triticale reduced the concentration of oxycarotenoids in egg yolks, Hens given triticale tended to eat more, convert feed less efficiently and gained less liveweight than those given wheat, but rate of egg production and egg weight were unaffected. The performance of hens given triticale plus wheat fell between that of those given either triticale or wheat as the sole cereal. Hens given wheat plus oats tended to lay fewer but heavier eggs with lower yolk colour and gained less liveweight than those given wheat. Ethoxyquin increased the concentration of oxycarotenoids in egg yolks but had no effect on other production traits.

scholarly journals Determination of relative economic weights of growth and egg production traits in Nigerian indigenous chicken

2021 ◽  
Vol 41 (2) ◽  
pp. 1-11
Author(s):  
C. C. Ogbu ◽  
E. E. Nwachukwu ◽  
C. C. Nwosu
Keyword(s):  
Body Weight ◽  
Egg Production ◽  
Body Weight Gain ◽  
Production Traits ◽  
Feed Conversion ◽  
Indigenous Chicken ◽  
Economic Weights ◽  
Chicken Carcass ◽  
Economic Weight ◽  
Gain Loss

The relative economic weight (REW) of a trait is the additional gain/loss from a unit change in the trait relative to other traits in an individual. They are used to calculate aggregate economic values for purposes of genetic improvement in animals. The present study was designed to evaluate the bio-economic variables of growth and 16 weeks egg production parameters: egg number (EN16) egg weight (EWT16) body weight at first egg (BWTFE), body weight at 16 week of lay (BWTE16), cost of feed, and revenue from eggs and chicken carcass, 16 feed conversion ratio (FCR ), and body weight gain (BWG16) in the Nigerian indigenous chicken, and to determine the economic weights (EW) and REW of EN16, EWT16 and BWTE16 for G0, G1, and G2 generations. A total of 250 pullets (20 week old, point of lay) from a population of heavy body weight local chickens were used for the study. The birds were housed individually in cages, fed optimally on layers mash (G and G : 100g/bird/day; G : 0 1 2 125g/bird/day) and given water ad libitum. Data included EN , EWT , BWTE , BWTFE, 16 16 16 and prices of feed, eggs and spent hens, FCR , and BWG . Data on EN , EWT , BWTE , 16 16 16 16 16 and BWTFE were compared across generations using ANOVAand with other variables were used to generate the EW of the traits. The EW were then standardized relative to that of BWTE . Results showed that EW and REW of EN , EWT , and BWTE were 7.47 and 3.15, 16 16 16 16 13.67 and 5.77 and -2.37 and -1.00, respectively in G ; 13.07 and 3.82, 23.69 and 6.93, and - 0 3.42 and -1.00, respectively in G ; 16.80 and 2.89, 30.75 and 5.28 and -5.82 and -1.00, 1 respectively in G generation. Thus EN and EWT enhanced while BWTE depressed the 2 16 16 16 worth of the hen as a layer. EWT was more important than EN and both were more 16 16 important than BWTE economically. Therefore, EWT and EN are the major bio-economic 16 variables of the local hen as an egg chicken.

scholarly journals Egg production and quality assessment of Nigerian indigenous chicken genotypes and their crosses with Marshall

2021 ◽  
Vol 43 (2) ◽  
pp. 28-36
Author(s):  
O. A Bassey ◽  
U Akpan ◽  
C. O. N. Ikeobi ◽  
O. A Adebambo ◽  
O.M.O Idowu
Keyword(s):  
Reproductive Performance ◽  
Egg Production ◽  
Egg Quality ◽  
Quality Trait ◽  
Quality Traits ◽  
Production Traits ◽  
Indigenous Chicken ◽  
Egg Weight ◽  
Better Than ◽  
Haugh Unit

This study focused on investigating the reproductive performance of Nigerian indigenous chickens and their crosses with Marshall. The genotypes were normal-feathered (Nn), frizzle-feathered (Ff) and naked neck (Na) chickens, while the crossbreds with Marshall (M) breed were MNn, MFf and MNa respectively (Marshall being the sire while the indigenous are dams). Data were taken on; weekly egg production, weight at first egg and age at first egg. Genotype significantly (P<0.05) influenced egg production traits. Egg weight ranged from 23.71±1.06g to 26.13±0.94g for indigenous purebreds and 39.75±0.75g to 48.06±0.57g for crossbreds. Age at first egg were 165.63±0.61 days (Nn), 170.60±0.75 days (Na) and 173.57±0.52 days (Ff), 188.71±1.67 days (MNn), 187.50±3.16 days (MNa) and 185.25±5.44 days (MFf). Also, genotype significantly (P<0.05) influenced egg quality traits. Heritability for first egg production traits were 0.37 (Nm), 0.16 (Na) and 0.66 (Fz) while heritability estimates for egg quality trait (haugh unit) were 0.14, 0.07 and 0.08 for Nm, Na and Fz birds, respectively The crossbreds performed better than the indigenous purebreds in egg production traits. The Nigerian indigenous chicken can therefore be improved upon for better egg production traits using the Marshall breed.

scholarly journals Naked-neck and frizzled feather fowls are high performance laying local chicken in Nigeria

2020 ◽  
Vol 44 (5) ◽  
pp. 9-13
Author(s):  
R. J. Nosike ◽  
J. C. Ezike ◽  
C. N. Odukwe ◽  
O. F. Nwakpu ◽  
C. N. Okocha ◽  
...  
Keyword(s):  
High Performance ◽  
Egg Production ◽  
The Other ◽  
Production Data ◽  
Naked Neck ◽  
Mean Values ◽  
Laying Performance ◽  
Egg Number ◽  
Local Chicken ◽  
Better Than

The study was conducted to investigate the effect of genotype on the laying performance of Nigerian local chicken. The experiment was carried out using 99 local chicken of the three genotypes, comprising of 90 hens and 9 cocks (33 frizzle feather, 33 naked-neck feather and 33 normal feathered). Eggs were collected from the different genotypes for 8 weeks. The laying performance traits were egg number, hen-housed (%) and hen-day (%) egg production. Data collected were subjected to ANOVA in a completely randomised design. The hen-day egg production showed significant differences (P<0.05) in all the weeks. Naked-neck genotype performed better in terms of hen-day egg production than the other two genotypes and had highest values in week 1 (27.14±0.01), week 5 (27.60±0.09), week 7 (34.53±1.13) andweek 8 (16.30±0.03). Therewere significant differences (P<0.05) in all the weeks for hen-housed egg production and naked-neck also performed better than the frizzled and normal feather apart from week 2, 3 and 6. The naked-neck genotype had highest mean values in week 1, 4, 5, 7 and 8 with 27.18±0.06, 25.70±0.02, 19.33±0.67, 24.08±0.22 and 11.39±0.03 respectively for hen-housed egg production. The naked-neck had significantly (P<0.05) higher values for egg number when compared with frizzle and normal feathered genotypes. The values ranged between 5.67±0.67 to 2.00±0.10 (naked-neck), 6.33±0.33 to 2.67±0.67 (frizzle) and 3.33±0.33 to 1.33±0.33 (normal). It is therefore, reasonable to incorporate the naked-neck and frizzled feather genotypes of local chicken in producing locally-adapted commercial eggs

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