Kempe R, Koskinen N, Strandén I
Biotechnology and Food Research, Biometrical Genetics, MTT Agrifood Research Finland, Jokioinen, Finland.
J Anim Breed Genet. 2013 Dec;130(6):445-55. doi: 10.1111/jbg.12044. Epub 2013 Jun 17.
Pelt character traits (size, quality, colour clarity, darkness) are important economic traits in blue fox breeding. Better feed efficiency (FE) is another economically important and new breeding goal for fur animals. The purpose of this study was to determine the correlations between pelt character traits, FE and size traits and to estimate genetic parameters for pelt character traits. Pelt size (pSIcm ) had a high positive genetic correlation with animal grading size (gSI), final body weight (BWFin), body length and daily gain (DG), and a moderate correlation with body condition score (BCS). Animal body length and BCS (describing fatness) were considered as genetically different traits. Genetic correlations between pelt quality and size traits were estimated without precision and did not differ from zero, but colour clarity (pCL) had a low antagonistic genetic correlation with FE. Pelt size and DG had a favourable genetic correlation with FE but a fairly high unfavourable genetic correlation with dry matter feed intake. The current emphasis on selection for larger animal and pelt size improves FE indirectly, but selection for larger pelt size favours fast-growing and fat individuals and simultaneously increases feed intake. The detected genetic connections between FE, size, feed intake and pCL should be taken into account in the Finnish blue fox breeding programme.
皮张性状（大小、质量、颜色清晰度、深浅度）是蓝狐养殖中的重要经济性状。更好的饲料效率（FE）是毛皮动物另一个具有经济重要性的新育种目标。本研究的目的是确定皮张性状、饲料效率和体型性状之间的相关性，并估计皮张性状的遗传参数。皮张大小（pSIcm）与动物分级大小（gSI）、最终体重（BWFin）、体长和日增重（DG）具有高度正遗传相关性，与体况评分（BCS）具有中等相关性。动物体长和体况评分（描述肥胖程度）被认为是遗传上不同的性状。皮张质量与体型性状之间的遗传相关性估计不精确且与零无差异，但颜色清晰度（pCL）与饲料效率具有低拮抗遗传相关性。皮张大小和日增重与饲料效率具有有利的遗传相关性，但与干物质采食量具有相当高的不利遗传相关性。当前对更大动物和皮张大小的选择间接提高了饲料效率，但对更大皮张大小的选择有利于快速生长和肥胖的个体，同时增加采食量。在芬兰蓝狐育种计划中应考虑检测到的饲料效率、体型、采食量和颜色清晰度之间的遗传联系。
