THREE CANDIDATE GENES AND ITS ASSOCIATION WITH QUANTITATIVE VARIATION OF EGG PRODUCTION TRAITES OF LOCAL QUAIL BY USING PCR-RFLP

The aim of study was to investigate the potential candidate gene SEMA3E, TLX and GH and their association with the economic traits, which is becoming increasingly important in poultry breeding program. A total of 72 genomic DNA samples from three female local lines of quail including (desert, brown and white) were collected to determine the association of genes with reproduction trait using PCR-RFLP Technique. According to growth performance the Best Linear Unbiased Prediction (BLUP) value in selected females for high (H) and low (L) production traits was ranged from -9.2173 to 0.3827. This value is used to estimate body weight at first egg (BWFE), age at first egg (AFE), weight at first egg (WFE), Egg number per Bird (ENPH), Average egg weight (EWTA), and hen day (HD) in three lines. The results indicate that there was a wide intra specific SEMA3E, TLX and GH variability among these local quails which identifying twelve differences genotypes. The identified genotypes for all genes had a significantly (P<0.05) affected on the reproduction trait during first 150 days. The quail’s genotype AAABAA always exhibited the largest body weight at first egg in desert H line, while L line of white was greater in Egg number per bird and hen day of the genotype ACCCAC. No significant associations were observed between all loci and age at first egg trait among local quails. The results indicate that there are agreements between BLUP values with PCR-RFLP results to achieve a favorable selection response in reproductive performance of local quail in Kurdistan region, Iraqi.

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Estimation of genetic parameters of growth and egg production traits by animal model in IWK layer strain

Indian Journal of Animal Research ◽

10.18805/ijar.b-3638 ◽

2019 ◽

Author(s):

P. Chandan ◽

T.K. Bhattacharya ◽

U. Rajkumar ◽

L.L.L. Prince ◽

R.N. Chatterjee

Keyword(s):

Animal Model ◽

Body Weight ◽

Egg Production ◽

Heritability Estimate ◽

The Body ◽

Production Traits ◽

Economic Traits ◽

Egg Weight ◽

Egg Number ◽

Highly Correlated

Indian White Leghorn strain-IWK has been improved for higher egg weight as well as number over last twelve generations at ICAR-Directorate of Poultry Research, Hyderabad. The data collected on various economic traits of egg production were analyzed using REML approach of animal model. Current study showed that the heritability estimate of body weight, age at sexual maturity (ASM), egg numbers and egg weight was moderate to high, low to moderate, low and high, respectively. The body weight was positively correlated with egg weight but negatively correlated with egg numbers. The body weight at 16 and 20 weeks were negatively correlated with ASM and were very important for achieving early ASM. ASM was negatively correlated with egg numbers. The egg weight regressed as the egg number increased. The part period egg production EP52 was highly correlated with EP64; therefore EP52 can be used for selecting parents for higher egg number instead of EP64.

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PCR-SSCP and <i>Hin6</i>I PCR-RFLP detecting novel anonymous SNPs within ovine <i>PROP1</i> gene (Brief report)

Archives Animal Breeding ◽

10.5194/aab-51-622-2008 ◽

2008 ◽

Vol 51 (6) ◽

pp. 622-623

Author(s):

X. Lan ◽

C. Pan ◽

S. Hu ◽

H. Chen

Keyword(s):

Thyroid Stimulating Hormone ◽

Animal Breeding ◽

Potential Candidate ◽

Production Traits ◽

Coding Regions ◽

Potential Candidate Gene ◽

Pcr Rflp ◽

Ruminant Animals ◽

Prop1 Gene ◽

Breeding And Genetics

Abstract. PROP1 plays a direct or indirect key role in the ontogenesis of pituitary gonadotropes, as well as somatotropes, lactotropes and caudomedial thyrotropes (WU et al., 1998). Mutations of PROP1 are responsible for deficiencies of POU1F1, GH, prolactin (PRL) and thyroid stimulating hormone (TSH) in Snell and Jackson dwarf mice and in man, as well as deficiencies of LH and FSH, suggesting that the PROP1 gene is a potential candidate gene associating with production traits in animal breeding and genetics. To date, no polymorphism of PROP1 gene has been reported in ruminant animals except bovine (PAN et al., 2007). So, the objective of this study is to investigate the polymorphism of all coding regions within ovine PROP1 gene by PCR-SSCP, DNA sequencing and PCR-RFLP methods, which will possibly contribute to conducting association analysis and evaluating them as genetic markers in animal breeding and genetics.

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ASSOCIATION BETWEEN BODY WEIGHT AND SOME EGG PRODUCTION TRAITS IN A STRAIN OF COMMERCIAL LAYER

Nigerian Journal of Animal Production ◽

10.51791/njap.v15i.1220 ◽

2021 ◽

Vol 15 ◽

pp. 119-125

Author(s):

K. L. AYORINDE ◽

A. A. TOYE

Keyword(s):

Body Weight ◽

Shell Thickness ◽

Egg Production ◽

Production Traits ◽

Egg Weight ◽

Weight Range ◽

Quadratic Equations ◽

Satisfactory Performance ◽

Body Weights ◽

Egg Number

Fifty 28 weeks old layers were reared in individual cages for 9 Weeks to detect the effect weight has on some production traits. Body Weight was positively though non- significantly (P.0.05) correlated with egg number, egg weight and negatively with Shell thickness (r =-0.12) and egg index (r=-0.15). Estimates of optimum 28-week body weights, as determined from second-degree (quadratic) equations, indicated that for satisfactory performance a body weight range of 1728 to 1814g is required, Breeding and good management especially feeding are thought to be capable of maintaining this weight range.

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Mathematical Modelling of Egg Production Curves of Shikabrown Parents

Nigerian Journal of Animal Production ◽

10.51791/njap.v44i1.432 ◽

2020 ◽

Vol 44 (1) ◽

pp. 61-75

Author(s):

A. Ahmadu ◽

M. Kabir ◽

A. O. Iyiola-Tunji ◽

O. M. Akinsola ◽

H. Igbadun

Keyword(s):

Body Weight ◽

Linear Model ◽

Egg Production ◽

Research Programme ◽

Coefficient Of Determination ◽

Production Traits ◽

Egg Weight ◽

Mean Values ◽

Egg Number ◽

Better Than

This study was conducted to evaluate egg production curves of Shikabrown parents, using mathematical models. A total of 200 birds: 100 from each of the two strains of Shikabrown® parents (sire and dam) lines at the Breeding Unit of Poultry Research Programme, National Animal Production Research Institute (NAPRI) were used for the study. The birds were obtained from the selected lines (sire and dam) and were denoted as Strain A and Strain B, respectively. Body weight (BWT), age at sexual maturity (ASM), egg number (EGGNO), and egg weight (EWT) were examined. Four non-linear models (Logistic, Richard, Gompertz, and Exponential) and a linear model were used to predict the efficiency of weekly bodyweight and egg production traits. The adequacies of the models were fitted using R Package, version 3.0.3. High coefficients of determination for BWT (R2 = 0.84 - 0.93) were recorded in the models for both Strains. Strain A had higher R2 (0.93) for BWT in Richard, Gompertz and Exponential models while Strain B recorded (R2 = 0.89) in Logistic, Richard and Gomprtz models. High coefficient of determination was obtained in a reproductive trait; egg number; in which almost all the models gave (R2 = 0.70). Exponential model recorded a higher R2 (0.93) for EGGNO in strain A. EWT in strain A recorded higher R2 (0.96) coefficient of determination across the four nonlinear models except linear model with (R2 = 0.95) for egg weight. Significant differences (P<0.05) were observed in the birds' performance for BWT and EWT, with strain B having a higher BWT (1.59±0.01) and Strain A having a higher EWT (48.75±0.17). Similarly, age of birds in lay had a concomitant significant differences (P<0.05) in their BWT as well as their EWT. The birds performed better for BWT and EWT in week 26 and 27 for both Strains. It was concluded that Strain significantly (P<0.05) had effect on BWT and EWT of Shikabrown® parent with Stain B performing better than Strain A in the former trait and strain A better than strain B in the latter trait. R2 identified differences between Strains in predicting egg production traits. Strain B was adjudged good and profitable because the Strain had the highest mean values in body weight and egg number and it is being recommended as one of the lines for future improvement of Shikabrown® .

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Influence of H-FABP gene polymorphisms on slaughter value of hybrid pigs

Acta Agraria Debreceniensis ◽

10.34101/actaagrar/57/2177 ◽

2018 ◽

pp. 55-60

Author(s):

Andrea Nyisalovits ◽

János Posta ◽

Levente Czeglédi ◽

Diána Juhász ◽

László Babinszky

Keyword(s):

Gene Mutations ◽

Intramuscular Fat ◽

Fat Content ◽

Potential Candidate ◽

Production Traits ◽

Potential Candidate Gene ◽

Pcr Rflp ◽

The Impact ◽

Intramuscular Fat Content ◽

Fabp Gene

The H-FABP gene was defined as a potential candidate gene influencing the fat deposition traits, primarily the intramuscular fat content. The aim of this study is to define whether the previously reported gene mutations are connected with the slaughter traits measured in a standard slaughterhouse. The study included data from 405 gilts and barrows from 2 different samples. The two chosen mutation (HFABP1: c. 103 T>C, HFABP2: c. 1970 T>C) were detected in one reaction with PCR-RFLP (Polymerase Chain Reaction-Restriction Fragment Lenght Polymorphism) method with HinfI restrictoin enzyme. The allel frequencies are as follows: 103T(H)=0.75; 103C(h)=0.25, 1970T=0.32; 1970C=0.68. A HFABP1 mutation has significant effect on backfat thickness and lean meat % at stable 1 (sample 1), but there were no effect at stable 2 (sample 2). The analysis of values of production traits, depending on HFABP2 genotype did not reveal significant differences. Based on this study we can’t get a clear conclusion on the impact of polymorphisms on production parameters. In the examined flock the allele frequency of mutation in 5 'UTR is identical to the literature data, i. e. the more favorable variant regarding the intramuscular fat content is predominant in the population.

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SAPU-SAPU FISH (Hyposarcus pardalis) AS A SINGLE PROTEIN SOURCE FOR LAYING MOJOSARI DUCKS

Journal of the Indonesian Tropical Animal Agriculture ◽

10.14710/jitaa.41.3.117-124 ◽

2016 ◽

Vol 41 (3) ◽

pp. 117-124 ◽

Cited By ~ 1

Author(s):

B. Indarsih ◽

A. Asnawi ◽

D. K. Purnamasari

Keyword(s):

Body Weight ◽

Feed Intake ◽

Egg Production ◽

Egg Quality ◽

Production Performance ◽

Protein Source ◽

Egg Mass ◽

Final Body Weight ◽

Egg Number ◽

Single Protein

The present study was conducted to evaluate the optimum level of dietary inclusion and the form of feeding sapu-sapu fish (SSF) as a single protein source for feed components of small holder Mojosari duck farming. A total of 180 twenty four wk-old laying ducks were fed with two forms (sun-dried and ground-fresh) and three levels of SSF (10, 20 and 30%) from 24 to 32 wk of age. Experimental diets were formulated containing 105.1; 141.5 and 177.9 g/kg crude protein and 3078; 3065 and 3052 kcal metabolizable energy (ME) /kg diet. Production performance and egg quality were measured. The form of SSF had a significant effect (P<0.0001) on feed intake, egg production, feed conversion, egg mass and egg number except final body weight. No significant effects (P>0.05) were found on all of the performance parameters measured due to feeding levels of SSF except feed intake and final body weight. The interaction of form and feeding level was significant (P<0.05) on egg and body weights. Low performance and egg quality were observed in the birds fed a diet containing the dried SSF. It can be suggested that local ducks required 20% SSF as a single protein source for maximum egg production (41.2%) and total egg number per wk (3.1 eggs/bird/wk) during 8 wk of rearing period. Egg quality can be improved by feeding the fresh SSF. However, due to be sufficiently better processing technique, the dried SSF would be potential to replace the common fish for laying ducks.

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DOMINANCE AND EPISTASIS IN HETEROSIS OF WHITE LEGHORN STRAIN CROSSES

Canadian Journal of Animal Science ◽

10.4141/cjas87-070 ◽

1987 ◽

Vol 67 (3) ◽

pp. 663-680 ◽

Cited By ~ 20

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

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Performance Evaluation of Kuroiler and Sasso Chicken Breeds Reared under On-farm and On-station Management Conditions in Tanzania

European Journal of Agriculture and Food Sciences ◽

10.24018/ejfood.2021.3.2.254 ◽

2021 ◽

Vol 3 (2) ◽

pp. 53-59

Author(s):

Fadhili S. Guni ◽

Said H. Mbaga ◽

Andalwisye M. Katule

Keyword(s):

Body Weight ◽

Egg Production ◽

Linear Models ◽

Farm Management ◽

General Effect ◽

Production Traits ◽

Gxe Interaction ◽

Live Body Weight ◽

Egg Production Rate ◽

On Farm

A study was conducted to evaluate the effect of management, breed, and their interaction on growth performance, egg production, and survivability under on-station and on-farm management conditions in Tanzania. A total of 1200 chicks, 600 for each breed, Kuroiler, and Sasso of mixed sexes were used. Birds under on-station management were confined and fed commercial ration throughout the experiment while those under on-farm management were allowed to semi-scavenge and supplemented with available feeds in the household. Brooding was carried out on-station for six weeks. Thereafter, birds were sub-divided for on-station and on-farm evaluation where data on body weight, egg production traits, and survival rate were taken at different ages from week 6 up to 52. The General Linear Models procedure fitting management, breed, and interaction between management and breed was used to analyze the data. Results show that management conditions had a significant influence on the performance of the breeds. Birds reared on-station performed better in all traits measured than those reared on-farm. The general effect of the breed was significant only for hen-day egg production (HDEP %) and hen-housed egg production (HHEP) in favour of Sasso chickens. Similarly, Sasso was more efficient at converting feed to live body weight. Interactions between management and breed were observed for all traits except peak egg production rate and mortality rate. While Sasso performance was better than that of Kuroiler on body weight, age at first egg, HDEP, age at peak egg production, and HHEP under the on-station management system, their performance in these traits were similar under the on-farm management except for body weight and age at first egg where Kuroiler was superior to Sasso. The survivability was also higher for Kuroiler than for Sasso under both management systems. It is concluded that genotype by environment (GxE) interaction had significant effects on the performance of the two breeds thus, a need to consider such effect when promoting them for either on-station or on-farm rearing.

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