After electing to bat, the hosts were struggling at 55 for three when Jackson joined Jogiyani at the crease and the two batsmen lifted their team out of trouble.
Jackson was batting on 102 off 184 balls while Jogiyani was scalped by leg-spinner Piyush Chawla after making 74 off 237 balls.
Giving Jackson company was Aarpit Vasavada on 17.
Saurashtra lost both the openers inside seven overs. Paceman Imtiaz Ahmed had Bhushan Chauhan caught behind for a duck while Chirag Pathak (4) was trapped by India discard paceman RP Singh.
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However, it was a long drawn battle for UP bowlers after that as Jogiyani and Jackson steadily built the innings.
Jogiyani hit 12 fours in his sedate knock while Jackson hit 14 fours and a six.
They batted together for 50 overs to ensure that momentum is withdrawn from the rivals. Chawla broke the stand when he had Jogiyani caught by Mukul Dagar.
Brief Scores:
Saurashtra 1st innings: 235 for 4 in 90 overs.(Sheldon Jackson 102 batting, Sagar Jogiyani 74; Piyush Chawla 2/61).