GESTATION LENGTH AND AGE AT FIRST CALVING OF CROSSBRED COWS IN CAMEROON

Q4 Veterinary

Veterinaria Pub Date : 2021-03-29 DOI:10.51607/22331360.2021.70.1.73

Flora Hakoueu, Niba Aziwo Tatanja, Henri Bayemi, Tchoumboué

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引用次数: 1

Abstract

Data on 139 crossbred cows obtained from the database of the Bambui Centre of the Institute of Agricultural Research for Development (IRAD) in the Sudano-Guinean altitude zone of West Cameroon were used to evaluate the effect of calf’s sex, parity and season on gestation length and age at first calving. These animals, reared between 1985 and 1995, were crosses between the imported Jersey (J) and Holstein (H) bull semen with local White Fulani (WF) and Gudali (G) cows. Gestation length (GL) varied significantly between the different genetic crossbred groups, whereas no effect of genetic composition was observed on AFC. These traits were affected by the lactation number, but not by calf sex and season. 50%Hx50%G recorded the shortest GL (279.87±2.66 days) with 40% of cows calving between 24-28 months. 87.5%Jx12.5%WF registered the longest (289.14±3.89 days) gestation period. The highest (30.63±8.21 months) age at first calving was in75%Jx25%WF group. Performances obtained for both GL and AFC with Holstein-Gudali (50%Hx50%G) crossbreed as compared to Jersey crossbreed revealed their high reproductive potential through their adaptability capacity to harsh conditions of tropics.

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喀麦隆杂交奶牛的妊娠期长度和初产犊龄

来自喀麦隆西部苏丹-几内亚高原地区农业研究促进发展研究所(IRAD) Bambui中心数据库的139头杂交奶牛的数据被用于评估小牛的性别、胎次和季节对妊娠期和首次产犊年龄的影响。这些动物在1985年至1995年间饲养，是进口泽西(J)和荷尔斯坦(H)公牛精液与当地白富拉尼(WF)和古达利(G)奶牛的杂交。不同遗传组合间妊娠期长度(GL)差异显著，而遗传组成对AFC无显著影响。这些性状受哺乳次数的影响，而不受犊牛性别和季节的影响。50%Hx50%G产犊期最短(279.87±2.66 d)， 40%产犊期在24 ~ 28月龄。87.5%Jx12.5%WF组妊娠期最长(289.14±3.89 d)。75% jx25% wf组初产犊龄最高(30.63±8.21个月)。与泽西杂交品种相比，荷斯泰因-古达利(50%Hx50%G)杂交品种GL和AFC的表现表明，其对热带恶劣条件的适应能力较高。

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来源期刊

Veterinaria 农林科学-兽医学

CiteScore

0.10

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： VETERINARIA is the official scientific journal of the Italian Companion Animal Veterinary Association (SCIVAC) and is published bimonthly by Edizioni Veterinarie (E.V.). Its aim is to promote the spread and development of new ideas and techniques in the field of clinical and veterinary practices, with the ultimate goal of improving and promoting the continuing education of veterinary practicioners. VETERINARIA publishes literature reviews, original articles, diagnostic corners and clinical cases on different topics related to medicine and surgery of the dog, cat and of other companion animals, as well as short communications from congresses.