International Journal of Animal Science, Husbandry and Livestock Production ISSN: 2141-5191 Vol. 6(1), pp. 285-291, February, 2020.  © Advanced Scholars Journals 

Review paper

Review on quantitative trait locus (QTLs) for yield and quality of milk, meat, fibre, eggs and their application

Yaekob Lorato Lomba

WoliataSodo University Dawuro Tarcha Campus, Departments of Animal and Range Science

E-mail:[email protected]

Accepted 29 January, 2020.

Abstract

Multiple estimated QTL effects and multiple trait selection could help to make better decisions regarding the use of MAS in animal improvement. Markers have been identified for almost all farm animal species, including milk production in dairy cattle, buffalo, sheep and goats; growth and carcass traits of beef cattle, chicken and goat; fibre and egg quality.QTL affecting milk yield has been identified on 20 of the 29 bovine chromosomes. QTL for milk yield on chromosome 1, 3, 9 and 20 are with evidence of QTL at lower reported frequency on other chromosomes (5, 7, 10, 12, 14 17, 18, 21, 23, 27 and 29). A number of gene detection projects have resulted in significant QTL for muscle, fat and other carcass traits as well as wool production efficiency is mainly determined by fleece weight and wool quality. Studies have been conducted in poultry that have focused on identifying QTL regulating body weight, carcass characteristics and egg traits; egg production and egg quality traits.  Hence,this paper was aimed to review of quantitative trait locus (QTLs) for milk yield/quality, meat quality, fibre quality,   eggs quality and their application.

Keywords: QTL, milk, meat, fibre, egg, quality.