H. Lee(Department of Animal Science, Chonnam National University)
B. R. Lee(Department of Animal Science, Chonnam National University, Korea Pear Research organization, Chonnam National university)
S. H Park(Department of Animal Science, Chonnam National University, Institute of Environmentally-Friendly Agriculture (IEFA), Chonnam National university)
T. H. Kim(Department of Animal Science, Chonnam National University)