齐卡（ZIKA）配套系肉兔在四川的选育

The Selection and Breeding of ZIKA Robbits in Sichuan Province

齐卡（ＺＩＫＡ）兔系１９８８年从德国引进的高产肉兔配套系，共６０只。兔群引进后由德国封闭式小环境变为我国开放式饲养，经历了气候、饲料及饲养条件等的巨大变化，通过４年３个世代的扩群、选育，齐卡配套系兔由６０只扩展到了年龄一致的二世代种用核心群３３０只，并向９个祖代场配套输送种兔８００余只，向全国出售各代种兔６０００余只。三系种兔的繁殖性能、生长发育逐代提高，二世代前三胎平均产仔数分别为：德国巨型白兔—Ｇ系６．６６±２．４０只；德国大型新西兰—Ｎ系６．７９±２．０７只；德国合成白兔—Ｚ系５．８１±２．６３只。比１９８８年基础群分别提高２１．１％（Ｐ＜０．０１）、３０．６％（Ｐ＜０．０１）和７．６％。６月龄重分别为Ｇ系４．５０±０．４９ｋｇ；Ｎ系３．５０±０．２４ｋｇ；Ｚ系３．３５±０．２３ｋｇ，比基础群分别提高１２．５％（Ｐ＜０．０５）、３．９％和１０．６％（Ｐ＜０．０５）。三系兔的繁殖性能分别接近和达到引进原种兔的生产水平，其中Ｇ系产活仔数超过引进原种１０．９％。三系兔６月龄和成年体重也达到引进原种水平。

Zika rabbits including its G,N,Z strains,totallg 60 of,them were introduccd form Germany in 1988,which is an exellent ment brecd,The rabbit herd suffered grect changes in weather,feed stuff and raising conditions,especially from rearing in confinemeht to open-air house affter introduced to Sichuan Province.This paper reported the results of selecting and breeding of these rabbits in 4 years and 3 generationy.The herd size increased to 330 in second generation from initial 60.Meanwhile,over 800 breeding animals were introduced to nine foundation breeders and morethan 6,000 breeding rebkits were sold nationwide.The reswlts showed that continuous improvemcnts in reproduction and growth of the anmals were achived.The siaes of the first three tiffers in second generation avernged 6.66±2.40,6.79±2.07 and 5.81±2.63 for G N and Z strains;respectively increa-sed by 21.1%(p<0.01),30.6%(P<0.01)and 7.6%;the liveweight at the age of 6-month was 4.50±0.49kg,3.35±0.24kg and 3.50±0.23kg respeively for G.N and Z strains,improvd 12.5%(P<0.05),3.9%and 10.6(P<0.05) Their reproduetive capacity reached the level of initial rabkits and the number of live litter at kirth of G stiayn exceeded 10.9% The liveweight at 6 months and adult of the three strains also reached its original.