To obtain baker's yeast which is provided with freeze resisting ability or has enhanced freeze resistance by elucidating a gene related to freeze resistance character of practical baker's yeast by a genetic method and to provide a new method for breeding freeze-resistant baker's yeast and a screening method.
This baker's yeast is provided with freeze resistance or has enhanced freeze resistance by raising the expression amount of YLR023C gene and/or YMR126C gene. The rise of the expression amount of YLR023C gene and/or YMR126C gene can be carried out by transformation using YLR023C gene and/or YMR126C gene, hybridization of baker's yeast having a large expression amount of YLR023C gene and/or YMR126C gene with another baker's yeast, etc. Freeze-resistant yeast can be selected by using the expression amount of YLR023C gene and/or YMR126C gene as an index.
KYOGOKU KENJI
SHIMIZU ICHIRO
HARASHIMA TAKASHI
KANEKO YOSHINOBU
