Study On The Features And Candidate Genes Of Egg Production In The Base Breeding Group Of Leizhou Black Duck

Egg weight, egg quality and number of eggs produced were main economic characters of ducks, they’re influenced by many factors. This study took Leizhou black duck as test material, and series of black duck’s performance were tested,such as egg Production curve fitting,different time periods of body weight with relationship of parts for egg production,ratio of material and egg, fertilization rate, fertile egg hatchability, cloning and analysis of FSH- beta gene and TSH- beta Gene in Leizhou peninsula in its egg producing peak period,et al. To provide reference for subsequent breeding to improve the characteristics of Leizhou black duck egg production and culture promotion. The results show that:(1) Peninsula compartment model of FIT of Black duck weeks laying rate in Leizhou is 0.9460. Wood model fitting is 0.9383. Wood modification of the model fitting was0.9378. Yang Ning model goodness-of-fit was 0.9503 and it was the best one. The representation of Yang Ning model was y(t)=0.86520*e0.00152t/(1+e-0.60680*(t-5.19900)), 18 weeks to 26 weeks of age rapid increase period for the Leizhou black duck egg production rate. 27 weeks to 41 weeks of age for the Leizhou black duck were egg production peak. After 42 weeks of age, weeks of Leizhou black duck egg production rate was slow decline, and corner weeks of Leizhou black duck laying rate was the 35 weeks of age.(2)The black duck breeding base in Leizhou F 2 group body weights, body oblique length, keel length, crista breadth, neck length in 5 weeks, and depth of chest, keel length,Semi- submersible long, neck length in 8 weeks, The Coefficient of variation in primary egg weight and 300- day- old egg number, and other indicators are greater than 10%. Still Have a large selection of space. Leizhou black duck egg-laying maturity egg weight in 5weeks of age and the half long dive significantly positive correlation(P﹤0.05), Select through 5 weeks of diving duck length to improve the breeding of Leizhou black egg weight. Leizhou black duck opening day had a significantly negative correlation with the pelvis width of the body weight at 5 weeks, 8 weeks of age(P﹤0.05), and we can use the body weight at 5 weeks,pelvis width of 8 weeks to change opening day of Leizhou black duck. The weight and 8- week- old coots open chest depth of Leizhou black duck had a significant positive correlation(P﹤0.01), and open weight with a 8- week- old shanklength has a significantly positive correlation(P﹤0.05). Through selecting 8- week- old chest deep and 8- week- old tibia length to change open- weight of Leizhou black duck.The number of 300 day- old black of Leizhou black duck egg production and open age had a significantly negative correlation(P﹤0.05). So we can delay age of Leizhou black duck drive to increase number of 300 day- old black duck eggs in Leizhou peninsula within limits. Canonical Correlation Analysis Between characters suggested, we should take into account more factors for increasing of breeding egg performance of Leizhou black duck.(3) Ratio of material and egg of Leizhou black duck in captivity was 2.24 in peak period of egg production, while 2.13 in cage cultured, Individual average daily feed intake in captivity duck was more than the ducks in cage. Individual average egg weight was lighter than the ducks in cage. Captive group of Leizhou black duck’s fertility rate was93.85 plus or minus 3.59, Group of Leizhou fertilization rate was 84.96 black ducks in cage 7.68, Fertilization rate of ducks in cage was significantly higher than captivity group( P<0.01). Strong typhoon weather conditions, Leizhou black ducks in cage mortality rate was 4.33 %, while was 1 % in captivity Leizhou black duck. After the typhoon weather,group of ducks in cage egg production rate slightly slower than the speed of recovery groups in captivity, and group of ducks in cage egg production rate slightly slower than the speed of recovery groups in captivity. After the 6th day, basically recovered to the level of laying before the typhoon.(4)Taste of Leizhou ranking black duck eggs took the flavor followed by the beach of grazing land grazing green shell eggs, white- shell eggs, cage green shell eggs, cage white shell eggs, captive green shell eggs, captive white- shell eggs, But the same breed aquatics mode no significant difference in the scores of different shell color eggs﹙P﹤0.05﹚. Making treference to the black duck flavor of Leizhou rating model study. Dark shell eggs more suitable for long-distance transport, while fresh light green shell eggs and white shell egg consumption in the local market – oriented.(5) Leizhou black duck fsh beta protein secretion of Extracellular hydrophobic- type protein, which belongs to the unstable proteins. While Leizhou black duck TSH- beta protein secretion of Extracellular hydrophilic protein, which belonging to the stability of protein.