World Rabbit Science - Vol. 04 (3)-1996

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DIALLEL CROSSBREEDING EXPERIMENT IN DANISH AND HUNGARIAN MEAT RABBITS 2. QUALITY EVALUATION, DISSECTION, AND CHEMICAL ANALYSIS OF CARCASSES
DIALLEL CROSSBREEDING EXPERIMENT IN DANISH AND HUNGARIAN MEAT RABBITS 1. REPRODUCTIVE PERFORMANCE, GROWTH, AND FEED CONVERSION
GENETIC CHARACTERISTICS AND DISTANCES AMONGST SPANISH AND FRENCH RABBIT POPULATIONS
THE ROLE OF FOLIC ACID AND IRON IN REPRODUCTIVE PERFORMANCE OF NEW ZEALAND WHITE DOES AND THEIR KITS
ADRENAL WEIGHT AND SERUM CHOLESTEROL CONCENTRATION IN RABBITS WITH DIFFERENTIAL CHOLESTEROLAEMIC RESPONSE TO CHOLESTEROL FEEDING.
COMPARATIVE EVALUATION OF RAW AND COOKED JACKBEAN (Canavalia ensiformis) ON THE PERFORMANCE OF WEANER RABBITS.
ETUDE PATHOLOGIQUE DE LA PODODERMATITE CHEZ LES LAPINS REPRODUCTEURS DE SOUCHE LOURDE SUR GRILLAGE
CHARACTERISTICS OF ANGORA RABBIT FIBRE 1 - THE INFLUENCE OF FIBRE ORIGIN ON FIBRE AND MEDULLA DIAMETER IN ANGORA WOOL
CHARACTERISTICS OF ANGORA RABBIT FIBRE 2 -THE INFLUENCE OF THE METHIONINE CONTENT IN FEED AND OF THE ENVIRONMENTAL TEMPERATURE ON FIBRE AND MEDULLA DIAMETER IN ANGORA WOOL
ETUDE DE LA RESISTANCE ACQUISE PAR LA LAPINE REPRODUCTRICE IMMUNISEE AVEC UNE LIGNEE PRECOCE d'Eimeria magna ET DE SA TRANSMISSION A SA PORTEE.
DESCRIPTION OF A SIMPLE METHOD FOR IN VIVO FOLLICULAR OOCYTE RECOVERY IN THE RABBIT

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THE ROLE OF FOLIC ACID AND IRON IN REPRODUCTIVE PERFORMANCE OF NEW ZEALAND WHITE DOES AND THEIR KITS
(World Rabbit Science. ICTA. UPV, 1996) El-Masry, K.A.; Nasr, A.S.
[EN] Forty eight lactating non-pregnant New Zealand White does 9 months of age and weighing 3468 g and in the third parity were used in the present study. The does were randomly divided into 4 equal groups of 12 each and were mated twice. The four groups of the pregnant does were given an unsupplemented diet (control) or a diet supplemented 5 mg folie acid (FA), 80 mg Fe (as Ferrous Sulfate, FeS04) or 5 mQ FA + 80 mg Fe/kg dry matter, respectively, fOr a period of two parities with two lactation cycles. All treatments had increased (P<0.05) maternal weight at 14, 21 and 28 days of gestation, as comparad to the control group. In does receiving FA or Fe, both litter size at birth and at weaning increased (P<0,05), while FA + Fe group insignificantly increased litter size at weaning only. Total mortality of young rabbit was significantly (P<0.05) lower in all treatments. FA, Fe, and FA+ Fe treatments increased (P<0.05) litter weight at weaning (5080, 3730 and 3160, respectively vs .. 2069 g) and improved (P<0.05) kit weight at weaning (666, 598 and 638, respectively vs 559 g) comparad to the control group. On day 28 of gestation, plasma progesterone level is increased in FA supplemented does and both progesterone and estradiol-171} levels are increased in does supplemented with Fe treatment. Plasma concentrations of T4, estradiol-171} and progesterone were significantly higher on day 28 of gestation in does supplemented with FA + Fe. Total milk yield/doe/lactation cycle was significantly higher in all treated groups than in the control (P<0.05). lt was concluded that the supplementation of FA or FA + Fe to a basal diets of pregnant does will improve their reproductlve performance.
GENETIC CHARACTERISTICS AND DISTANCES AMONGST SPANISH AND FRENCH RABBIT POPULATIONS
(World Rabbit Science. ICTA. UPV, 1996) Martin-Burriel, I.; Marcos, S.; Osta, R.; García-Muro, E.; Zaragoza, P.
[EN] A total of 990 rabbits were tested using 18 blood electrophoretic markers. These animals belong to 6 breed populations presently breed in Spain (Spanish Common, Spanish Giant, Butterfly, Burgandy Fawn, New Zealand White and Californian), one Spanish cross-breed population, three French crossbreed populations originated from the INRA selected lines (1077, 2066 and 9077) and one Wild Spanish population. 12 markers were found to be polymorphic (Dia-2, 6-Pgd, Es-1, Es-2, Es-3, Es-7, Ada, Hp, Tf, Ca-2 and Hb), each one being controlled by one locus and showing autosomal co-dominant Mendelian inheritance. We have found large differences in gene frequencies of Dia-2, 6-Pgd, Ada, Es-1, Es-2 and Es-3 loci in French populations. The genetic variabiliy estimated using the average degree of heterozygosity was lower in French than in Spanish populations. The results obtained from genetic distance analysis showed differences between French and Spanish populations. France 3 was the most divergent population. The genetic distance values obtained revealed that French populations are as different amongst themselves as they are between Spanish populations (the value obtained was corresponding to subspecie, NEI, 1987). These differences could have originated from the high selectiva pressure applied to parental lines. In the Spanish group, Spanish Giant was the most divergent population.
ETUDE PATHOLOGIQUE DE LA PODODERMATITE CHEZ LES LAPINS REPRODUCTEURS DE SOUCHE LOURDE SUR GRILLAGE
(World Rabbit Science. ICTA. UPV, 1996) Drescher, B.; Schlender- Böbbis, I.
[EN] Paws from female breeding ZIKA-rabbits out of a conventional husbandry - single caged on wired floor - have been investigated pathologic-anatomically and -histologically. The found alterations could be classified in 6 stages, which are demonstrated in detail to show the pathogenesis of the pododermatitis. The 6 stages of the histological findings are presentad in a histo-dermogram, making evident the progressing loss of histological structures up to the end of total necrosis. The possibilities of regeneration and reparation are discussed as well as the valuation of the damage under animal protection aspects.
ETUDE DE LA RESISTANCE ACQUISE PAR LA LAPINE REPRODUCTRICE IMMUNISEE AVEC UNE LIGNEE PRECOCE d'Eimeria magna ET DE SA TRANSMISSION A SA PORTEE
(World Rabbit Science. ICTA. UPV, 1996) Drouet-Viard, F.; Coudert, P.; Roux, C.; Licois, D.; Boivin, M.
[EN] Fifty two coccidia free rabbit does were used in this experiment an~ 26 of them were immunized by repeated per os inoculations of 10 oocysts of Eimeria magna precocious line during gestation.The oocyst output was completely controlled after the third inoculation and signs of disease were never observed. The serum antibodies (Ab) were titrated by an ELISA method. In the controls, the Ab titers were constantly below the optical density 0.25 at the wave length 405nm. In immunized does, the Ab level began to increase 4 weeks after the first inoculation. Booster inoculations given 7 and 4 days before parturition produced a high increase of Ab level. 26 females received an injection of sporozoites extracts 2 and 17 days atter parturition; these injections produced a dramatic lncrease of the Ab level compared with that of the untreated females. The serum Ab of the weanlíngs were titrated at 29 and 39 days of age. In all groups, the Ab titers were very low but a slightly higher level was observed in the goups corresponding to the immunized does. The dramatic increase of the Ab titers of the does injected with sporozoites had no effect on the Ab titers of their litters. To test the protectlog transmitted by the mothers, the weanlings were inoculated with 10 oocysts of the same Eimeria magna precocious line and the oocyst output 'fªs measured. The whole excretion of oocysts was identical (6 x 10 oocysts) in all groups, and the decrease in welght galn was identical to that of inoculated controla. We can conclude that the does' immunity did not protect the litter against an infection with E.magna.
DIALLEL CROSSBREEDING EXPERIMENT IN DANISH AND HUNGARIAN MEAT RABBITS 2. QUALITY EVALUATION, DISSECTION, AND CHEMICAL ANALYSIS OF CARCASSES
(World Rabbit Science. ICTA. UPV, 1996) Jensen, J.F.; Jensen, J.A.; Szendrö, Z.; Sorensen, P.; European Commission
[EN] The two rabbit meat breeds, Danish White (O}, represented by a 3-way cross of 3 lines from the Danish lnstitute of Animal Science (DIAS), and Pannon White (H), represented by a synthetic breed from the Pannon Agricultura! University (PAU) were used in a diallel crossing experiment carried out simultaneously at the two locations. In the four combinations: DO, OH, HD, and HH the male breed is mentioned first. Carcass weight averaged 1,650 g for ali carcasses. Body length was longest in (HD) carcasses. The dressing percentage was biggest in group (OH). For fleshiness and confonnation of carcasses, group (HD) got the highest score - 7.50 points. Group (DO) got 7.46 points and the two groups (OH) and (HH) got 7.36 and 7.34 points, respectively. Group (DO) and (HD) got the highest score for leg. At the cutting-up programme, no significant differences in the percentage for forepart were recorded between the four groups. The male carcasses had a significantly higher percentage forepart, 21.5 versus 20.9 for female carcasses. For loin the opposite was found, 35.8% for male and 36.8% for female carcasses, while no significant difference between the sexes was seen for hind part. So, the anatomy of the sexes seems to be different. M.long.dorsi as a percentage of the carcass weight was significantly higher in group (HD) than in the other groups. lt was smallest in group (DO), 10.1%. The groups (HH) and (OH) showed 11.0 and 10.6%. The percentage of fat free meat was significantly larger in the groups (HD) and (DO) than in the groups (OH) and (HH). The content of fat was significantly higher (P<0.001) in female than in male carcasses, 10.10%' and 8.89%, respectively. In the female carcass, there was a highly significant correlation betweml the judged amount of fat and percentage fat in the analysis, r = 0.54 . In male carcasses the correlation was smaller and not sígnificant, r = 0.12. Between carcass weight an.P points fotJleshiness, the correlation was highly significant, r = 0.64 and 0.63 for males and females, respectively, but between carcass weight and percentage of protein in the carcasses the correlation was negative and non-significant. The visual judgement of fleshiness/confonnation was, in this investigation, much influenced by the weight of the carcass, and only for female carcasses it was related to the fat content of the car-case. Significant differences between groups were found for M.long.dorsi (length as well as relative weight) and for fat free meat, too.

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