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Bayesian inference of genetic parameters for reproductive and performance traits in White Leghorn hens
egg production fertility genetic correlation hatchability heritability
2018/11/23
This study estimated the genetic parameters for reproductive and performance traits and determined which ones can be used as selection criteria for egg production in laying hens using the Bayesian inf...
Actigraph as a Device for Estimation of Heat Production of White Leghorn Hens under High Ambient Temperature
heat production activity count standing time ambient temperature feed intake
2009/8/3
Eight commercial Single Comb White Leghorn hens were used to study the effects of high ambient temperature on behavioral activities and to select a better parameter for the estimation of heat producti...
Effect of Physical Activities on Heat Production of White Leghorn Hens under Different Lighting Regimes
heat production activity count standing time lighting regime laying hen
2009/7/31
Six Single Comb White Leghorn laying hens (Shaver, Star cross 288) were used to estimate heat production (HP) for physical activities under different lighting regimes (LR) of 12L : 12D, 14L : 10D and ...
Changes in Thickness and Weight of Shell Portion of Egg and in Weight and Size of Whole Egg during the Stay in the Uterine Part of the Oviduct (Shell Gland) in the Guineafowl:Comparison with White Leghorn Hens
guineafowl shell gland eggshell formation egg size
2009/7/31
The thickness and weight of the shell portion (shell with shell membrane) of eggs at various times during the stay in the uterus and at oviposition were found to be greater in the guineafowl than thos...
Behavioral Activities and Energy Expenditure of White Leghorn Laying Hens under Day-Night Cyclic Temperatures
behavioral activities energy expenditure cyclic temperature laying hen
2009/7/31
Single Comb White Leghorn laying hens (Hyline) were fed ad libitum in order to estimate energy expenditure of behavioral activities (BA) such as standing, eating or body movements et cetera under arti...
Cryopreservation of Primordial Germ Cells (PGCs) from White Leghorn Embryos Using Commercial Cryoprotectants
chicken cryoprotectants PGCs recovery-rate viability
2009/7/30
Cryopreservation of poultry semen has been reported, but preservation of female genetic material has not been possible because of the large size of their yolk structure. Cryopreservation of primordial...
Growth Performance of Single Comb White Leghorn Chicks Fed Diets Containing Blood Meal Supplemented with Isoleucine
blood meal body weight gain feed consumption feed conversion Single Comb White Leghorn
2009/7/29
The suitability of blood meal supplemented with isoleucine as protein source for Single Comb White Leghorn (SCWL) chicks was evaluated. In four replicates, four hundred and eighty SCWL chicks were fed...
Histological Study of the Caecal Tonsil in the Cecum of 4- 6 Months of Age White Leghorn Chicks
Cecum caecal tonsil nodular unit histology
2009/1/19
Cecum, the largest part of chicken’s large intestine, has an important role in liquid absorption and cellulose digestion. It acts as a defensive organ as well due to the presence of large masses of di...
Lmbr1 Expression in Early Embryo Development Stages in White Leghorn and Chinese Silky
Polydactyly Lmbr1 Embryo Development White Leghorn Chinese Silky
2016/4/28
Lmbr1 is regarded as a key gene that controls the digital model formation in early developmental stages of the chicken. However, there are few reports of lmbr1 expression levels and tendencies in 4-to...
Relative Performance and Immune Response in White Leghorn Layers Fed Liquid DL-methionine Hydroxy Analogue and DL-methionine
Performance Immune Response DL-methionine DL-methionine Hydroxy Analogue Free Acid White Leghorn Layer
2016/4/26
The relative performance and immune response was evaluated in White Leghorn layers fed liquid DL-methionine hydroxyl analogue-free acid (MHA-FA) relative to dry DL-methionine (DLM) in maize-soybean-su...
Influence of Supplemental Vitamin D3 on Production Performance of Aged White Leghorn Layer Breeders and Their Progeny
Vitamin D3 White Leghorn Layer Breeders Production Performance
2016/4/22
An experiment was conducted to elucidate the effect of graded levels of vitamin D3 in White Leghorn (WL) layer breeders on egg production, shell quality, hatchability of eggs and juvenile performance ...
Effects of Dietary Non-phytate Phosphorus Levels on Egg Production, Shell Quality and Nutrient Retention in White Leghorn Layers
Non Phytate Phosphorus Egg Production Shell Quality Nutrient Retention White Leghorn Layers
2016/4/19
An experiment was conducted (28 to 44 weeks) to study the laying performance, shell quality, and nutrient retention of White Leghorn layers fed different levels of non-phytate phosphorus (NPP). Six le...
Relationship between Intersequence Pauses, Laying Persistency and Concentration of Prolactin during the Productive Period in White Leghorn Hens
Bromocriptine Inter Sequence Pauses Ovulatory Sequences Oral Feeding Prolactin White Leghorn
2016/4/19
Prolactin is considered to influence the taking of pauses in between ovulatory sequences in White Leghorn hens. Therefore modulating concentrations of prolactin using bromocriptine - a dopamine agonis...