The University of Nebraska has reportedly applied to join the Big Ten and become the conferenceâÄôs 12 member.The announcement came Friday on the last day of a rumored ultimatum issued to Nebraska to either join the Big Ten or remain in the Big 12.

The Big Ten is expected to act quickly on the school’s invitation.

It would be the first team to join the Big Ten since Penn State was added in 1990.

Nebraska would also become the second in two days to leave the Big 12. The University of Colorado announced Thursday that it was leaving the conference in favor of the Pac-10.

Nebraska’s decision was made after an emergency meeting of the school’s Board of Regents.

“One school leaving a conference does not destroy a conference,” Chancellor Harvey Perlman said, according to the Associated Press. “Nebraska did not start this discussion. After the Big Ten announced it planned to consider expansion, we saw reports that Missouri would want to go to the Big Ten, including a statement by their governor, a member of board of curators and chancellor — comments that weren’t clearly supportive of the Big 12.”

The Big Ten is reportedly not looking to add any school other than Nebraska at the current time.

Both the ultimatum and Big 12 exodus are believed to be triggered by a weekend announcement by Pac-10 officials that the conference was interested in adding six teams from the Big 12.

In addition to Colorado, the Pac-10 is expected to add Texas, Texas A&M, Texas Tech, Oklahoma and Oklahoma State by Tuesday.