| Popis: |
One of the key opportunities to improve nitrogen efficiency on dairy farms is to produce more milk because it is the major source of nutrient exported from the farm. Milk yield is influenced both by environmental and genetic factors. The improvement in this trait is based on phenotype observations and evaluation of the progeny. However, the increasing advances in DNA based technologies can help more efficient improvement in this trait than classic selection methods alone. The paper discusses seven potential functional and positional genes (casein αS1, casein αS2, β casein, κ casein, leucine aminopeptidase 3, family with sequence similarity 13, member A and perixosome proliferator activated receptor gamma coactivator 1 alpha), all located on bovine chromosome 6, with 33 QTLs affecting milk yield reported. |
