Kenny Walker scored 28 points, most of them on layups, as No. 3 Kentucky routed Mississippi, 95-69, in the quarterfinals of the Southeastern Conference basketball tournament last night in Lexington, Ky.

It was the ninth victory in a row for the Wildcats and their 17th straight over an SEC foe. They advance to Friday's semifinal against Louisiana State, which beat Florida, 72-66, earlier yesterday.

Mississippi State, the SEC's cellar team, turned in the biggest upset so far with a 65-63 victory over second-seeded Auburn. The Bulldogs will play Alabama, which beat Georgia, 79-59.

Kentucky (27-3), playing at home, had 11-0 and 16-0 bursts in the first 12:15 for a 31-9 lead.

In upsetting Auburn (19-10), Chauncey Robinson scored 25 points as Mississippi State (8-21) survived three missed free throws in the final 37 seconds to win.

In earlier games, John Williams had a record 20 rebounds and 20 points and Derrick Taylor scored 27 points to lead LSU (22-10).

With Buck Johnson (21 points) and Derrick McKey (15) controlling the inside, Alabama (22-7) led by as many as 17 points in the first half, then pulled away. Michigan 99, Ohio State 82

Roy Tarpley scored 22 points and Antoine Joubert had 17 as the No. 7 Wolverines beat the Buckeyes in Ann Arbor, Mich.

The victory raised Michigan's record to 26-4, 13-4 in the conference. The Wolverines will play host to Indiana Saturday to determine the conference champion. The Buckeyes are 14-13, 8-9. Iowa 57, Illinois 53

In Iowa City, Roy Marble scored five points late in the game and sophomore Bill Jones hit three clutch free throws to lift the Hawkeyes over the 19th-ranked Illini.

Iowa, keeping alive its hopes of landing an NCAA berth, improved to 19-11, 9-8. Illinois is 20-9, 10-7. Pacific Coast Athletic Association

Anthony Jones and Armon Gilliam scored a total of 41 points to lead 13th-ranked Nevada-Las Vegas to a 68-49 victory over Fresno State in quarterfinals in Inglewood, Calif.

In earlier action, University of Pacific scored a 55-53 victory over San Jose State, and New Mexico State beat Utah State, 74-71. ECAC Metro Conference

Ron Winbush had four of his 28 points in overtime to lead sixth-seeded Robert Morris to a 75-69 upset victory over third-seeded Loyola (16-11) in quarterfinals in Coraopolis, Pa.

Tournament host Robert Morris advances to Friday's semifinals against Marist (17-11), an 83-64 winner over St. Francis of New York. Defending conference champion Fairleigh Dickinson (21-7), which defeated Long Island University by 86-57, faces Wagner (16-12). Western Athletic Conference

Johnny Brown scored 31 points as New Mexico (17-12) upset Brigham Young, 79-68, in quarterfinals in Laramie, Wyo. Meanwhile, top-seeded Wyoming (19-10), on Les Bolden's 20-foot jumper at the buzzer, held off long shot Air Force to advance, 67-65.

Earlier, Texas-El Paso (26-5) beat Colorado State, 58-50, and San Diego State (9-18) upset Utah, 73-71.