scholarly journals Effects of c.494A>C and c.267T>G SNPs in OCX-32 Gene of Korean Native Chicken on Egg Production Traits

2014 ◽  
Vol 41 (3) ◽  
pp. 191-196
Author(s):  
Ji-Yeon Lee ◽  
So-Young Choi ◽  
Chong-Dae Kim ◽  
Yeong Ho Hong ◽  
Dong Kee Jeong ◽  
...  
Keyword(s):  
Egg Production ◽  
Production Traits ◽  
Native Chicken ◽  
Korean Native Chicken

scholarly journals Production Traits and Stress Responses of Five Korean Native Chicken Breeds

2020 ◽  
Vol 47 (2) ◽  
pp. 95-105
Author(s):  
Eun Jung Cho ◽  
Eun Sik Choi ◽  
Hyeon Cheol Jeong ◽  
Bo Kyung Kim ◽  
Sea Hwan Sohn
Keyword(s):  
Stress Responses ◽  
Production Traits ◽  
Native Chicken ◽  
Chicken Breeds ◽  
Korean Native Chicken

scholarly journals Estimation of Combining Ability of Production Traits from Diallel Crosses of Korean Native Chicken Strains

2017 ◽  
Vol 44 (3) ◽  
pp. 189-198 ◽  
Author(s):  
Eun Sik Choi ◽  
Min Hee Bang ◽  
Ki Gon Kim ◽  
Jae Hyun Kwon ◽  
Ok Young Jung ◽  
...  
Keyword(s):  
Combining Ability ◽  
Production Traits ◽  
Diallel Crosses ◽  
Native Chicken ◽  
Korean Native Chicken

scholarly journals Heterosis for egg production in native by exotic by inbred chicken crosses

2021 ◽  
Vol 32 (1) ◽  
pp. 7-20
Author(s):  
I. Udeh ◽  
S. I. Omeje
Keyword(s):  
Egg Production ◽  
Production Performance ◽  
Egg Mass ◽  
Production Traits ◽  
Short Term ◽  
Gene Effects ◽  
Egg Weight ◽  
Native Chicken ◽  
Backcross Populations ◽  
Dominant Genes

Inbred lines generated from the native and exotic chickens were compared with their F1 and backcross populations for a range of short term egg production traits. The experimental birds were brooded for 8 weeks and raised on a deep litter pens from 8 to 40 weeks of age. Age at first eggs were longer in the crossbred groups and the delay was mostly caused by the dominant genes from the exotic parents. Highly significant (P>0.01) heterosis were obtained by the crossbred groups in hen day rate and total egg mass respectively. The heterosis observed in the crossbred groups for egg weight was low and mostly non significant. the backcross groups recorded residual heterosis in egg production traits ( hen day rate, total egg mass and egg weight) and the magnitude was higher in the exotic than the native backcrosses. The results further indicate that the egg production performance of the crossbred groups were mostly influenced by maternal, sex linked, dominance and epistatic gene effects. It was suggested that the egg production potential of the native chicken could be improved further by cross mating-selected native and exotic backcross groups. This should be followed by crisscrossing.

Estimation of genetic parameters for body weight and egg production traits in Mazandaran native chicken

2012 ◽  
Vol 44 (7) ◽  
pp. 1437-1443 ◽  
Author(s):  
Shahram Niknafs ◽  
Ardeshir Nejati-Javaremi ◽  
Hassan Mehrabani-Yeganeh ◽  
Seyed Abolghasem Fatemi
Keyword(s):  
Body Weight ◽  
Egg Production ◽  
Genetic Parameters ◽  
Production Traits ◽  
Native Chicken ◽  
Estimation Of Genetic Parameters

Phenotypic characterisation of native chicken lines in South Africa

2001 ◽  
Vol 29 ◽  
pp. 71-78 ◽  
Author(s):  
E. van Marle-Köster ◽  
N.H. Casey
Keyword(s):  
South Africa ◽  
Food Security ◽  
Egg Production ◽  
Scientific Data ◽  
Household Food Security ◽  
Phenotypic Traits ◽  
Production Traits ◽  
Household Food ◽  
Native Chicken ◽  
Phenotypic Characterisation

SummaryNative chicken lines in South Africa are associated primarily with rural households. A programme was established only as recently as 1994 to conserve the different lines found in South Africa. As no scientific data was available on the production traits of these lines, a research trial was conducted to describe them phenotypically in terms of their growth, carcass traits and egg production. Four different native lines, the Koekoek, Naked Neck, Lebowa-Venda and Ovambo chicken were included in the study. Significant differences were observed among the lines, which means that the lines could be described as different native lines in terms of their phenotypic traits. The Ovambo chicken had the best growth performance, while the Koekoek showed the highest performance for egg production. Although production is poor in comparison with commercial lines, the contribution of these birds to household food security and application in low-input systems should be recognized and further investigated.

scholarly journals Effects of Essential Oils-Based Supplement and Salmonella Infection on Gene Expression, Blood Parameters, Cecal Microbiome, and Egg Production in Laying Hens

Animals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 360
Author(s):  
Georgi Yu. Laptev ◽  
Elena A. Yildirim ◽  
Larisa A. Ilina ◽  
Valentina A. Filippova ◽  
Ivan I. Kochish ◽  
...  
Keyword(s):  
Egg Production ◽  
Salmonella Enteritidis ◽  
Laying Hens ◽  
Expression Profiles ◽  
Blood Parameters ◽  
Post Inoculation ◽  
Production Traits ◽  
Immunological Parameters ◽  
Specific Expression ◽  
Blood Biochemical

One of the main roles in poultry resistance to infections caused by Salmonella is attributed to host immunity and intestinal microbiota. We conducted an experiment that involved challenging Lohmann White laying hens with Salmonella Enteritidis (SE), feeding them a diet supplemented with an EOs-based phytobiotic Intebio®. At 1 and 7 days post-inoculation, the expression profiles of eight genes related to immunity, transport of nutrients in the intestine, and metabolism were examined. Cecal microbiome composition and blood biochemical/immunological indices were also explored and egg production traits recorded. As a result, the SE challenge of laying hens and Intebio® administration had either a suppressive or activating effect on the expression level of the studied genes (e.g., IL6 and BPIFB3), the latter echoing mammalian/human tissue-specific expression. There were also effects of the pathogen challenge and phytobiotic intake on the cecal microbiome profiles and blood biochemical/immunological parameters, including those reflecting the activity of the birds’ immune systems (e.g., serum bactericidal activity, β-lysine content, and immunoglobulin levels). Significant differences between control and experimental subgroups in egg performance traits (i.e., egg weight/number/mass) were also found. The phytobiotic administration suggested a positive effect on the welfare and productivity of poultry.

Isolation and Characterization of a Novel H9N2 Influenza Virus in Korean Native Chicken Farm

2011 ◽  
Vol 6 (4) ◽  
pp. e68-e69
Author(s):  
Yu-Na Lee ◽  
Dong-Hun Lee ◽  
Jae-Keun Park ◽  
Tea-Hyun Lim ◽  
Ha-Na Youn ◽  
...  
Keyword(s):  
Influenza Virus ◽  
H9n2 Influenza Virus ◽  
Isolation And Characterization ◽  
Native Chicken ◽  
Chicken Farm ◽  
Korean Native Chicken

​Identification of Single Nucleotide Polymorphism (SNP) C-2161G in the Promoter Region of Prolactin Gene and its Association with Egg Production in Tellicherry Native Chicken

2021 ◽  
Author(s):  
Azhaguraja Manoharan ◽  
S. Sankaralingam ◽  
P. Anitha ◽  
Binoj Chacko ◽  
T.V. Aravindakshan
Keyword(s):  
Single Nucleotide Polymorphism ◽  
Promoter Region ◽  
Egg Production ◽  
Rflp Analysis ◽  
Genotypic Frequency ◽  
Nucleotide Polymorphism ◽  
Single Nucleotide ◽  
Chicken Population ◽  
Native Chicken ◽  
Prolactin Gene

Background: Prolactin is a physiological candidate gene which has significant effects on egg production in poultry. Also, it plays a major role on incubation behaviour (broodiness) in birds. The main objective of the present study was identification of single nucleotide polymorphism (SNP) C-2161G in the promoter region of prolactin gene and its association with egg production in Tellicherry native chicken population. Methods: A total of 200 blood samples were collected from the randomly selected birds of Tellicherry native chicken in All India Co-ordinated Research Project on Poultry improvement (AICRP) farm, Mannuthy, Thrissur, Kerala. Isolation of Genomic DNA was done and the isolated samples were subjected to polymerase chain reaction (PCR) followed by restriction fragment length polymorphism (RFLP) analysis to identify the SNP C-2161G of prolactin gene. Result: On the basis of RFLP patterns, birds were designated with three different genotypes namely CC, CG and GG. The allelic and genotypic frequency was calculated. The observed genotypic frequency at the SNP site C-2161G was CC (0.61), CG (0.160) and GG (0.23) and the frequency of allele was 0.69 for C and 0.31 for G. The egg production was shown to be statistically similar for the genotypes of SNP C-2161G.

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