摘要
【目的】探索茶花鸡产蛋规律,为提高茶花鸡的产蛋性能提供参考。【方法】测定茶花鸡的产蛋性能指标(开产日龄、开产日龄体重、30周龄和43周龄产蛋数和蛋重),并进行皮尔逊相关性分析。采用不同的非线性模型对茶花鸡20~45周龄的产蛋率和累计产蛋数进行曲线拟合分析,并与观测值进行比较。【结果】茶花鸡的开产日龄、30周龄和43周龄蛋重的变异系数均低于10%,开产日龄体重、30周龄及43周龄产蛋数的变异系数则高于10%。产蛋性能指标相关分析结果显示共有10对性状之间具有显著相关性(P<0.05),茶花鸡开产体重与开产日龄呈显著负相关,开产日龄与30周龄及43周龄产蛋数显著负相关,30周龄蛋重与30、43周龄产蛋数显著负相关。开产体重与30周龄及43周龄蛋重显著正相关,开产日龄与30周龄蛋重显著正相关,30周龄蛋重与43周龄蛋重显著正相关,30周龄产蛋数与43周龄产蛋数显著正相关。产蛋率曲线拟合结果表明:拟合度最好的是杨宁模型(R^(2)=0.990);累计产蛋量曲线拟合结果表明,3种模型拟合度都在0.991以上,其中Von Bertalanffy的拟合度最高(R^(2)=0.999)。【结论】茶花鸡开产体重、30周龄和43周龄产蛋数有改良空间,开产日龄、30周龄和43周龄蛋重整齐度较好。由于蛋重跟产蛋数呈负相关,育种过程中应兼顾蛋重与产蛋数,且开产日龄等指标是茶花鸡产蛋性能选育过程中重要的衡量指标。杨宁和Von Bertalanffy模型分别适用于茶花鸡产蛋率和累计产蛋数拟合,可对茶花鸡的产蛋规律进行评估和预测。
【Objective】The egg-laying of Chahua chickens was analyzed,and applicable prediction models evaluated.【Methods】The indicators of egg-laying performance,including the age and body weight of chicken at start of egg-laying and the individual weight and number of eggs of 30-and 43-week-old chickens,were recorded for a Pearson correlation analysis.Various nonlinear models for curve fitting on egg production rate and cumulative egg production of 20-to 45-week-old chickens were compared.【Results】The coefficients of variation on the initial egg-laying age and the egg weight of 30-and 43-week-old chickens were below 10%.But those on the body weight at start of egg-laying and the numbers of eggs laid at 30-and 43-week were higher than 10%.There were significant correlations among 10 characteristics of the egg-laying performance(P<0.05).For instance,a significant inverse correlation was observed between the chicken body weight and age at first egg-laying,between the age at start of egg-laying and the egg number of 30-and 43-week-olds,and between the egg weight of 30-week-olds and the numbers of eggs laid by the 30-and 43-week-old chickens.Whereas significant positive correlations were found between the body weight of chickens at time of initial egg-laying and the egg weights of 30-and 43-week-olds and between that and the egg weight of 30-week-olds.Significant correlations were also shown between the egg weight of 30-week-old chickens and that of 43-week-olds,and between the number of eggs laid by the 30-week-olds and that by 43-week-olds.Among the tested models,Yang-Ning had the highest R^(2) of 0.990 on curve fitting for the egg yield.For the cumulative egg yield,all 3 models yielded R^(2) above 0.991 with Von Bertalanffy being the highest at 0.999.【Conclusion】There appeared rooms for performance improvements on the body weight of the birds that started laying eggs and the weights of individual egg laid by the 30-and 43-week-old Chahua chickens,but less so on the starting age of egg-laying and the weights o
作者
刘永
自先念
杜彦丽
李子健
康佳佳
高振东
王坤
豆腾飞
贾俊静
葛长荣
LIU Yong;ZI Xiannian;DU Yanli;LI Zijian;KANG Jiajia;GAO Zhendong;WANG Kun;DOU Tengfei;JIA Junjing;GE Changrong(Faculty of Animal Science and Technology,Yunnan Agricultural University,Kunming,Yunnan 650201,China)
出处
《福建农业学报》
CAS
CSCD
北大核心
2021年第12期1387-1394,共8页
Fujian Journal of Agricultural Sciences
基金
国家自然科学基金项目(U1702232、31572359、31560618)
云南省自然科学基金重点项目(2016FA046)
云南省科技厅南希·莱恩院士工作站(2017IC048)
云南省科技厅邱声祥院士工作站(202005AF150039)
云南省“云岭学者”专项(2021)
云南省创新团队项目(2019HC011)。
关键词
茶花鸡
产蛋性能
产蛋率
累计产蛋数
曲线拟合
Chahua chickens
egg-laying performance
egg-laying rate
cumulative egg numbers
model fitting
