关键词: 资源库, 大鼠, 保种, 繁殖性能

Abstract: Objective To determine the propagation level of four SPF rats ( SD, Wistar, F344 and BN) stored in national rodent experimental animal repository. Method The closure of the closure using the recording parallel line mating method using the cycle mating method.  The average number of vegetation and the size of the four-day tires of the four kinds of spine rats. The average number of vibe and the number of daily. And recorded the initial mating age, the first production age, the initial production and intervening of the tires. Result The average number of ventricles in SD rats was 12 to 13, the first 2-breeding level was basically maintained relatively stable, the result of the detection of the three, the four testers was reduced in the first 1-25. The residual rate of SD rats was 98. 2%; the initial production of the SD rats was 84, 110. 7, 26. 7 d, the tires of the tires of 26 d to and 31 d. Wartar rats were 10-11, the average number of the first 2 tires, the average number of vibe average and the level of the system is relatively stable, 3,4 tires detection result showed that the first and second tension showed the trend of the production of the various types of tires (P<0. 05) ; the initial mating age of the Wistar rats was 98. 3%; the initial production age of the Wistar rats was 91, 118. 5, 27. 5 d, respectively, the tires were 25 to 30 d. F344 rats first to four quarters of the average number of 8, the first three trials of each product, the average number of vibes and the basis of the basic maintenance of the relatively stable, the fourth tone detection index than the front three trials showed a significant decline in phenomenon ( P < 0. 05) ; variance analysis result also showed a significant difference in the number of hunting of the enemy (P<0. 05) ; the first mid-term age of F344 rats was 98. 4%; the first production age of the F344 ratio was 92. 7, 122. 7, 30 d, the tires of the various times of the tires were 27 degrels and 40 d. BN rats first to four quarters of the average number of 5 to the average number of four-day, the average number of vibe average and the number of daily system is relatively stable, and the ratio of BN rats was 98. 9%; the initial mating age of the BN rats was 82. 8, 124. 6, 41. 8 d, respectively, and the tires of the tires of the tires of 33-37 d. Conclusion The proportion of 4 kinds of SPF rats in the resource library was significantly higher than the proportion of the proportion of the breeding levels of the scale production and national rodents of the national rodents.

Key words: Resources Center, rat, seed conservation, reproductive performance