全州禾花鲤主要生长性状的遗传参数估计

Genetic Parameters Estimation for Main Growth Traits of (Cyprinus carpio var. Quanzhouensis)

关键词:  全州禾花鲤  生长性状  遗传力  遗传相关  表型相关  育种值

Key words:  Cyprinus carpio var.Quanzhouensis  growth traits  heritability  genetic correlation  phenotypic correlation  breeding value

摘要:

为估计全州禾花鲤（Cyprinus carpio var.Quanzhouensis）生长性状的遗传参数，采用嵌套交配设计和人工授精法构建了23个全州禾花鲤家系，利用混合线性模型估计全州禾花鲤体质量、体长、体宽、体长/体宽、日增重的遗传力、表型相关、遗传相关及育种值。结果表明：体质量（0.45，P<0.01）、体长（0.42，P<0.01）、体宽（0.36，P<0.01）和日增重（0.39，P<0.05）为高遗传力，体长/体宽（0.12，P>0.05）为低遗传力。体质量、体宽、全长、日增重性状相互之间有较高的表型相关与遗传相关（0.76-0.99），体质量与体长/体宽、日增重与体长/体宽之间表型相关与遗传相关（0.55-0.67）较低。育种值分析显示日增重与体长、日增重与体宽、体长与体宽性状育种值之间极显著相关（P<0.01），采用育种值开展个体选择与表型值选择结果存在明显差异。全州禾花鲤选育应采用多性状综合选育策略，同时改良生长速度、体型和体色性状，从而获得优质高产禾花鲤新品种。

Abstract:

To estimate the genetic parameters for growth traits of Cyprinus carpio var.Quanzhouensis, 23 families of C.carpio var.Quanzhouensis were constructed by nested mating design and artificial insemination.A mixed linear model was used to estimate the heritability, phenotypic correlation, genetic correlation and breeding value of weight, body length, body width, body length to body width ratio, daily gain of C.carpio var.Quanzhouensis. The results showed that body weight (0.45, P<0.01), body length (0.42, P<0.01), body width (0.36, P<0.01) and daily gain (0.39, P<0.05) were high heritability, and the body length to body width ratio (0.12, P>0.05) was low heritability.There were high phenotypic correlation and genetic correlation (0.76-0.99) among body weight, body width, total length and daily gain traits.The phenotypic correlation and genetic correlation (0.55-0.67) between body weight and body length to body width ratio, daily gain and body length to body width ratio were low.The analysis of breeding value showed that there was a very significant correlation between daily gain and body length, daily gain and body width, body length and body width (P<0.01).There were significant differences in the results of individual selection and phenotypic value selection using breeding value.The multi-trait comprehensive breeding strategy should be adopted in the breeding of C.carpio var.Quanzhouensis, and the growth rate, body shape and body color traits should be improved at the same time, so as to obtain new varieties of C.carpio var.Quanzhouensis with high quality and high yield.