滩羊的毛色及其遗传

研究表明,滩羊的毛色遗传是比较复杂的,但仍表现出了一定的规律,即同类型毛色的公母羊相配,后代中多数或大多数甚至全部个体的毛色表现与其亲代毛色一致;不同类型毛色的公母羊相配时,若以头部有黄色斑点和纯白毛色的公母羊互配.则大部分后代表现为父系毛色,但若以此两种毛色的公羊与头部有灰色斑点或头部黑色斑点的母羊相配时,后代多表现为母系毛色特征。文中还初步分析了滩羊毛色类型间的显隐性关系,同时指出了可能存在的修饰基因及基因互作关系,显性等级关系等尚需进一步研究。研究还指出,改良滩羊毛色的分布范围比控制毛色炎型的一致性较为容易。在滩羊选育工作中,选用标准毛色的种公羊是改良滩羊毛色的简便而有效的方法。

Fleece Color Inheritance on Tan-Sheep

The authors have been studying flecce color inheritance on Tan-Sheep.The results obtained show that though fleece color inheritance is more complicated,some laws exist. Mating between the same color sheep,most of the lambs showed the same color with their parents;Mating between different color sheep,if one of the parents showed yellow spots on the head and another showed white,most of the lambs showed fatherly color;If these two color rams were mated with ewe showihg black or grey spots on the head,most of the lambs showed maternal color.The authors analysed initially the dominant and recessiveness relation beween types of fleece color on Tan-Sheep and indicated that the gene interaction or modifying gene,and dominant grade might exist.These need studying further.The study also showed it is easier to improve range of color than to control the unifomity of color on the body,and it is an effective and simple method to use standard color ram in order to improve Tan-Sheep color.