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饲养恩达马牛、富拉尼瘤牛及其杂交牛的农户的生产目标、性状和品种偏好以及对育种计划的影响。

Production objectives, trait and breed preferences of farmers keeping N'Dama, Fulani Zebu and crossbred cattle and implications for breeding programs.

作者信息

Traoré S A, Markemann A, Reiber C, Piepho H P, Valle Zárate A

机构信息

1Department of Animal Breeding and Husbandry in the Tropics and Subtropics,University of Hohenheim,Garbenstrasse 17,70599 Stuttgart,Germany.

2Institute of Crop Science,Biostatistics Unit,University of Hohenheim,Fruwirthstrasse 23,70599 Stuttgart,Germany.

出版信息

Animal. 2017 Apr;11(4):687-695. doi: 10.1017/S1751731116002196. Epub 2016 Oct 27.

Abstract

Many local livestock breeds in developing countries are being replaced by exotic breeds, leading to a loss of genetic resources. In southern Mali, for the past two decades, a trend towards increasing crossbreeding between the trypanotolerant N'Dama cattle and the trypano-susceptible Fulani Zebu cattle has been taking place. A survey with 160 farmers owning a cattle herd was carried out in southern Mali to investigate their production objectives, as well as trait and breed preferences and correlated socio-economic determinants in order to understand farmers' breeding decisions and to identify comparative advantages of three breed groups (N'Dama, Fulani Zebu and crossbreds) raised in the study area. Data were analyzed using an exploded logit model. The reasons for raising cattle, as well as trait and breed preferences reflected the multiple objectives of the farmers. Draught power and savings were the most important production objectives. Productive traits were ranked highest; farmers reported large body size as the most preferred trait, followed by fertility, draught ability and milk yield. Crossbreds were the favored breed group. Breed preferences were mainly explained by 'resistance to disease' for N'Dama cattle and 'high market price' for Fulani Zebu and crossbred cattle. Production objectives, trait and breed preferences were mainly influenced by farmer group (local farmers and settled transhumants). Local farmers put comparatively more emphasis on livestock functions linked to crop production such as draught power. They had a higher preference for traction ability as a selection trait and preferred N'Dama over Fulani Zebu cattle. Settled transhumants emphasized milk yield as a selection trait and preferred Fulani Zebu over N'Dama. The results indicate that the trend towards more crossbreeding will continue putting the N'Dama breed under high risk of genetic dilution in southern Mali. The N'Dama cattle remain a valuable breed due to their adaptive traits such as disease and drought tolerance and their good traction ability, fulfilling the diverse objectives of local farmers. Crossbreeding was found to be a promising breeding strategy, which might contribute to the maintenance of the local breed, provided that breeding schemes are thoroughly planned and organized.

摘要

发展中国家的许多本地家畜品种正被外来品种所取代,导致遗传资源丧失。在马里南部,过去二十年来,耐锥虫的恩达马牛和易感染锥虫的富拉尼瘤牛之间的杂交趋势一直在增加。在马里南部对160名拥有牛群的农民进行了一项调查,以调查他们的生产目标、性状和品种偏好以及相关的社会经济决定因素,以便了解农民的育种决策,并确定在研究区域饲养的三个品种组(恩达马牛、富拉尼瘤牛和杂交牛)的比较优势。使用扩展logit模型对数据进行了分析。养牛的原因以及性状和品种偏好反映了农民的多重目标。役力和储蓄是最重要的生产目标。生产性状排名最高;农民报告说,体型大是最受欢迎的性状,其次是繁殖力、役用能力和产奶量。杂交牛是最受欢迎的品种组。品种偏好主要由恩达马牛的“抗病性”和富拉尼瘤牛及杂交牛的“高市场价格”来解释。生产目标、性状和品种偏好主要受农民群体(当地农民和定居的游牧民)的影响。当地农民相对更强调与作物生产相关的家畜功能,如役力。他们对牵引能力作为选择性状的偏好更高,并且比起富拉尼瘤牛更喜欢恩达马牛。定居的游牧民强调产奶量作为选择性状,比起恩达马牛更喜欢富拉尼瘤牛。结果表明,更多杂交的趋势将继续使恩达马品种在马里南部面临高遗传稀释风险。恩达马牛仍然是一个有价值的品种,因为它们具有诸如抗病和耐旱等适应性性状以及良好的役用能力,满足了当地农民的多样化目标。杂交被发现是一种有前景的育种策略,前提是育种计划得到充分规划和组织,这可能有助于当地品种的维持。

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